Lahmeyer - Aktuell 2010 08

InformatIon on the Lahmeyer InternatIonaL Group, no. 55 / auGust 2010

sudan:hydroeLectrIc power pLants shereIk and kajbar

unIted arab emIrates:abu dhabI – aL reem IsLand deveLopment

saudI arabIa:combIned cycLe power pLant Qurayyah II

seneGaL:new cadastre system

2

Contents

cover

Waldeck Pumped Storage Plants at Lake Eder in Germany

E.ON Wasserkraft operates the pumped stor-age plants of Waldeck 1 and 2 close to Lake Eder. After more than 75 years of operation the original Waldeck 1 scheme was replaced by a modern 70 MW pump turbine in a new shaft powerhouse. For the Waldeck 2 scheme (2 x 240 MW) an extension is planned with an ad-ditional 300 MW unit.

ma s t h e a d

Publ isher: Lahmeyer Internat ional GmbH, Bad V i lbe l , Germany

Design and L i thography: SaarRepro, Ottwei ler, GermanyPr int : Ottwei ler Druckerei und Verlag GmbH,

Ottwei ler, Germany

Photographic Ev idence: Lahmeyer Internat ional ‘s Photo Archive, E.ON Wasserkraf t , cover, p. 13 and p. 14; GTB Olpe, p. 13

© Lahmeyer Internat ional GmbH 08/10

p. 3 U.A.E.: Abu Dhabi – Al Reem Island Development

p. 4 Russia and Ukraine: Development of the Electricity Carbon Emission Factors for Russia & Ukraine

p. 5 Sudan: Khartoum North Power Station I & C Rehabilitation

p. 6 Power Plant Performance Calculation and Investment Cost Estimation

p. 8 Cyprus: Vasilikos Power Station, Phase IV – Unit 5 CCGT, 220 MW

p. 9 Saudi Arabia: Qurayyah Combined Cycle Power Plant QCCPP II, 3.200 MW

p. 10 Hydropower Projects of Lahmeyer International in the Nile Basin (Graphic)

p. 12 Sudan: The Development of the River Nile in the Sudan – The Shereik and the Kajbar Hydropower Project

p. 13 Germany: Extension of Waldeck 2 Pumped Storage Plant

p. 14 Sudan: Merowe Dam and Power Station – Assistance for Operation & Maintenance

p. 16 Senegal: Design and Implementation of a New Cadastre System using Open Source Software

p. 18 Middle East: Lahmeyer International creates New Ways for Transportation Systems

p. 19 Germany: Advanced Service Range at Lahmeyer Rhein-Main

p. 19 Germany: 15th German Symposium on Dams in Aachen

3

En

Er

gy

Project ObjectiveAbu Dhabi is the largest of the

seven Emirates of the United Arab Emirates on the Arabian Gulf, with the Capital Abu Dhabi City on Abu Dhabi Island. The development of Al Reem Island is one of several Mega Development Projects in the region and the largest of it’s kind in Abu Dhabi. All Mega Projects aim at increasing the facilities for a growing population in Abu Dhabi City and it’s surroundings, and to eliminate the actual lack of living accommo-dations.

Al Reem is a natural island, located 500 m off the coastline of Abu Dhabi Island. The total area is approx. 9 km2. The Al Reem devel-opment project comprises the plan-ning, design and construction of a large number of high rise buildings for residential accommodation and business, as well as the entire infra-structure of the island. After com-pletion of all works, Al Reem will be like a city in the city, with all infra-structure and amenities for a mod-ern lifestyle.

Electrical Power Demand ForecastThe overall Project Developer

established the Integrated Master Plan for the city. Because all instal-lations and the infrastructure were planned simultaneously in advance, the electric power demand forecast had to base on land usage with the

Gross Floor Area (GFA) Method. The hot and humid climate of the region is reason for a very high demand for cooling in summer, and consequently a high demand for electric power. In order to relieve the electric power network, efficient District Cooling Plants (DCP) are being introduced instead of the tra-ditional wall A/C units, the “Split Units”, or the self contained building central cooling plants.

The large number of high rise buildings thus causes a very high power demand per unit area. This fact, together with the demand from the “District Cooling Plants”, results in a higher load density than on the main island of Abu Dhabi. In order to satisfy the requirements, Abu Dhabi Distribution Company (ADDC), which is responsible for the electric energy supply, introduced the new 22 kV distribution voltage level instead of the traditional 11 kV. By doing so, the number of neces-sary distribution substations and medium voltage cables, and there-fore the investment cost, is reduced.

The total electric power demand of Al Reem Island will reach almost 1,200 MVA.

Electrical InfrastructureBesides one 400/132 kV Grid

Station and three 132 kV Substa-tions, approx. 250 Distribution Sub-

stations, together with the related 22 kV cable network are in various execution stages.

Involved InvestorsThe island is divided into three

regions, for which three main devel-opers are responsible: Tamouh Investments, Sorouh Real Estate and Reem Investments. The devel-oper Bunya LLC is responsible for the roads and other overall infra-structure. The development is planned in several phases, the first phase is under execution and will be completed soon.

Involvement of the Lahmeyer Office Abu Dhabi (LOAD)Lahmeyer Office in Abu Dhabi

(LOAD) has a decisive function in the described development works. Besides the Consultancy for the mentioned 400 kV Grid Station and 132 kV Substations, ADWEA has placed a contract with LI, for super-vising all phases of the planning and execution of the 22 kV network by the developers until handing over of the installations to the end user ADDC. Abu Dhabi Water & Electric-ity Authority (ADWEA) is the author-ity which is responsible for ensuring compliance with the govenment’s rules for electricity and water supply in the Emirate.

ChallengesEach of the regional project

developers are responsible for one defined region, in which they plan and execute the 22 kV electric power network with distribution substations and power cables. However, in order to optimize the network in the whole island, the supply coverage areas of individual primary substations have to overlap with the individual developers’ areas.

The first challenge for LOAD is the integration and co-ordination of the project developers’ planning, in order to optimize the load distribu-tion and loading of the substations and also to avoid overloading.

The second challenge is the construction across the region bor-ders, for the 22 kV cable network as well as for a glass fibre optical

U.A.E.

Abu Dhabi – Al Reem Island Development

3

The Al Reem island at the shore of Abu Dhabi.

4

En

Er

gy

cable network for centralized super-vision of the substations. The inter-faces at the region borders have to be defined very carefully.

The third challenge results from delay in the construction of one of the primary substations, making necessary temporary solutions in order to supply energy to several

important facilities from a substa-tion which is already in service. Due to the temporary solution, two dif-ferent network scenarios have to be followed up simultaneously, one for the initial network and one for the planned final configuration after completion of the delayed primary substation.

In the first stage of the develop-ment, of three primary substations’ networks, both Single Line Diagrams and geographical layouts are final-ized and installations are in progress. The above challenges are still ahead for the other primary stations.

Raju M. K.

rUssiA And UkrAinE

Development of the Electricity Carbon Emission Factors for Russia & Ukraine

The project “Development of the electricity carbon emission factors for Russia and Ukraine” was assigned by the European Bank for Reconstruction and Development (EBRD) to Lahmeyer International with Perspectives as subcontractor in July 2009.

It is a Baseline Study with the overall goal to calculate reliable car-bon emission factors for Russia and Ukraine for the period from 2009 to 2020. These electricity carbon emis-sion factors for the seven Russian electricity systems as well as the united Ukrainian electricity system shall facilitate to derive the baseline scenario of future Joint Implementa-tion (JI) project activities under the Kyoto Protocol. EBRD considers

financing a large number of invest-ment projects.

In order to claim carbon credits under JI, a project needs to show the extent to which emissions are being reduced by comparison with a business-as-usual scenario (referred to as the baseline). Standardised baseline emission factors can be used by JI project developers and project owners to calculate emission reductions for:

• projects that reduce electricity consumption from the grid (demand side);

• projects that add new, efficient capacity or renewable energy-based production to the grid (supply side);

• projects that improve the effi-ciency of transmission and distri-bution of electricity.

As per the work schedule the project was divided into three major Work Packages (WP) of which WPI and WPII have already been com-pleted (May 2010) and WPIII will be completed during summer 2010: Work Package I dealt with load fore-casts, consumption patterns and technological characteristics of exist-ing power plants as well as the expected development of the power generation system during the next decade. During that project stage Lahmeyer International’s experts col-laborated with decision-makers of the Ministry of Economic Develop-ment (MED) in Moscow, Russia, and the National Environmental Invest-

Territorial electricity systems in Russia.

Fig.1: Daily dispatch forecast for 19.01.2017 in IPS Urals.

5

En

Er

gy

ment Agency (NEIA) in Kiev, Ukraine. Both institutions also act as the National Focal Points for the Joint Implementation scheme.

Subsequently, a sophisticated Power System Simulation Model has been developed in Work Package II. The model serves as tool in order to simulate the future operation of the Russian Integrated Power Systems IPS Center, IPS East, IPS North West, IPS Siberia, IPS South, IPS Urals and IPS Volga with more than 700 fossil fuelled thermal power gen-eration units as well as the United Power System UPS Ukraine with its 150 fossil-fuelled thermal power gen-

eration units. The model computes forecasts of the daily load and calcu-lates the most probable operation of power generation units taking into account system characteristics, such as e. g. must-run units for heat and power cogeneration during transition and winter periods. An exemplary daily dispatch of IPS Urals in the year 2017 is depicted in Figure 1. Accord-ingly, the contributions of the different types of power units for satisfying electricity demand in each hour can be seen. Differences between load and generation shapes are due to electricity imports and exports.

Having simulated annual genera-tion and the specific fuel consump-tion of the power generators, the respective grid carbon emission fac-tors have been derived in accord-ance with requirements of the United Nations Framework on Climate Change (UNFCCC). Figure 2 presents the forecasted develop-ment of the carbon emission factors in IPS Siberia. The so-called Operat-ing Margin expresses the emission factor of all actually utilised power generation units, whereas the Build Margin takes into account only recently built power generation units in order to depict trends of most recent capacity additions. The Com-bined Margin constitutes the result-ing average.

In Work Package III the TÜV SÜD in its role as Accredited Independent Entity under the Joint Implementa-tion will critically review the model and Baseline Studies prepared by LI and validate their conformity with official rules determined by the UNFCCC.

The project is realised by the Department of Economics and Energy Efficiency in close collabora-tion with the Department of Thermal Power Plants.

Achim Schreider, Philipp Eckert

Fig. 2: Forecasted Development of the Carbon Emission Factors in IPS Siberia.

sUdAn

Khartoum North Power Station I & C Rehabilitation

The Khartoum North Power Sta-tion is an oil-fired steam power plant located in the Khartoum North Industrial Area of Sudan’s Capital. The power plant consists of four units:

• Phase 1: 2 x 30 MW, commissioned in 1984 and

• Phase 2: 2 x 60 MW, commissioned in 1994.

End of 1999 LI was commis-sioned with a feasibility study to elaborate an overall rehabilitation concept for Khartoum North Power Station.

Khartoum North power station.

6

En

Er

gy

The aim of the rehabilitation meas - ures were not only to simply re place the existing systems but also to

• optimize generation (improving the plant efficiency),

• increase the availability and relia-bility,

• ensure safe operation,• minimize flue gas emissions to

follow the global trend and• upgrade of the operational level.

Whereas the project was initially intended in mainly replacing the I&C equipment and mainly the power plant control system, the feasibility study also revealed further need for rehabilitation.

For instance, it was found that there were settlements of some foundations e. g. of two turbine foun-dations. A further assessment pro-vided that the reasons of this were leakages of firefighting, cooling water and sewage pipes. Therefore the existing firefighting system was replaced and the cooling water pipes were improved in a separate short track project.

Furthermore, the electrical sta-tion service power supply had to be replaced including almost all cabling. Also some parts of the mechanical equipment such as burners and many valves needed to be replaced.

Due to the change from the exist-ing conventional control systems to a modern computerized control sys-tem with monitor-based supervision and operation it became necessary also to change and modernize the control room completely. Finally, it was also found that the firefighting

system as well as the HVAC system needed rehabilitation measures as well.

After finalization of the feasibility study the project was delayed due to financial restrictions and other more important projects like the construc-tion of new power stations. Only some urgent works were executed. But in the year 2004 the Islamic Development Bank (IDB) agreed to finance partly the project.

Therefore in April 2004 a contract for consultancy services for the Khartoum North Power Station, I & C Rehabilitation Project, was signed between the Owner, the National Electricity Corporation – Sudan (NEC), and LI.

The contract includes consul-tancy services starting with an updated rehabilitation study, prepa-ration of specifications and tender documents, evaluation of offers, site supervision and commissioning till taking over by NEC.

After the retreat of Siemens and ABB out of the Sudan, which were the participants in a first tendering process, the project had to be reten-dered and the contract was finally awarded to a Korean consortium in July 2008 under the leadership of the company DIMCO. Since the Consortium was not able to partly pre-finance the project throught their own financial resources, only parts of the rehabilitation works could be contracted directly, i. e. for the units 3 and 4 for the following equipment:• Distributed Power Plant Control

System,• local instrumentation,

• Station Services Power Supply (MV- and LV-switchgear, UPS, MV-/LV cables, control cables,

• central control room equipment,• burners, shut-off and control

valves and• parts of the firefighting system.

Such works for units 1 and 2 are included as options in the contract.

The hardware of the Distributed Control Systems was delivered by the Finnish company METSO, the software, the local instrumentation and all the electrical systems are provided by Korean companys and some important parts of the burners were produced by Hamworthy, UK.

It is worth mentioning that NEC is executing parts of the work under their own direction. For example the new super heaters were not included in the main contract and were assigned to another company. The steam blowing of the boilers was executed by NEC staff.

The works are executed within the time schedule by all parties. The design stage with design review and approval as well as workshop tests for the major equipment took about 15 months from October 2008 till December 2009. The erection works started in November 2009 and at this time the project is in the final stage of commissioning.

Latest developments show that the IDB is also willing to finance the rest of the project, so LI is looking forward to continue the successful work.

Manfred Kugler

Power Plant Performance Calculation and Investment Cost Estimation

For more than 18 years Lah-meyer International has been using the Software of Thermoflow for design performance calculations and simulations of fossil-fired power plants. Actually, Lahmeyer Interna-tional was the first user of this inno-vative software package in Europe. Furthermore, Lahmeyer supported the development and optimization of

the software of Thermoflow with suggestions and constructive criti-cism over the years. In the last years some workshops lasting several days have been organized at the Lahmeyer office. At these workshops beginners and advanced users have learned the extensive possibilities of the Thermoflow software.

The software package mainly consists of the following six pro-grams:

• GT PRO• GT MASTER• STEAM PRO• STEAM MASTER• THERMOFLEX• PEACE

7

En

Er

gy

Fig. 1: heat and mass balance diagram of the 2+1 CCPP Vasilikos.

Fig. 2: GT PRO 3D-Model.

GT PRO is used for designing of single-cycle gas turbines and com-bined-cycle power plants also in addition with:

• IGCC (Integrated Gasification Combined Cycle);

• carbon capture and• sea-water desalination:

– MSF (Multi Stage Flash Evap-oration),

– MED (Multi Effect Desalination) and

– RO (Reverse Osmosis).

STEAM PRO is used for design-ing of steam power plants with differ-ent boiler designs (conventional boiler, circulating fluidized bed boiler, grate-fired boiler).

GT MASTER and STEAM MAS-TER is used for simulation of the designed power plant types at differ-ent operating conditions (Ambient conditions, part load operation, etc.).

For the calculation of thermody-namic processes, which cannot be solved with GT PRO or STEAM PRO, the THERMOFLEX software is used. With THERMOFLEX the system to be investigated will be composed with single modules for each component. At the next step the process param-eters will be defined for each com-ponent. Afterwards the simulation of the overall process can be carried out. Most of the time this program is used at Lahmeyer for the perform-ance calculations of solar power plants, geothermal and other low caloric processes, auxiliary boilers as well as special customer require-

ments. THERMOFLEX also provides the opportunity to combine the mod-els which have been calculated using the other Thermoflow programs, e. g. solar-combined-cycle power plants.

The PEACE-Program (Plant Engi-neering and Construction Estimator) is mainly a cost data base for esti-mation of the investment cost of a power plant.

The whole software-package is used for:

• pre-feasibility studies, feasibility studies, comparison studies, design studies;

• investment cost calculations;• design basis reports;• master plans and• bid evaluations.

Due to the large number of appli-cations these programs are used interdisciplinary in the following departments:

GE3 „Privately Financed Projects“;GE4 „Thermal Power Plants“;GE5 „Renewable Energies“ and

GE7 „Economics and Energy Effi-ciency“.

The Lahmeyer projects in Cyprus are a typical example for such an interdisciplinary application of the whole Thermoflow Software.

For the „Expansion plan study and related services, Cyprus“ (GE7) different power plant options have been calculated with GT PRO and STEAM PRO. Performance calcula-tions were executed for single-cycle power plants, combined-cycle power plants and steam power plants with different capacities. The estimated CAPEX (Investment costs) and OPEX (Operation and Maintenance costs) for the different power plant options have been used for the economic analysis. In this respect the power demand has been considered depending on the load curve over the year. Therefore it was necessary to execute the part load calculations with GT MASTER and STEAM MAS-TER.

The result of the economic analy-sis was as follows: The best solution for the power demand in Cyprus is a power plant configuration with two gas turbines, two heat recovery boil-ers and one steam turbine with a total capacity of 220 MW (Figure 1).

Therefore, the project „Vasilikos Power Station, Phase IV“ (GE4) has been continued with the optimal solution of a 2+1 CCPP with 200 – 220 MW. In the Design Basis Report all 2+1 options within this range of capacity have been investigated. In addition an optional air inlet cooling for the gas turbine has been fore-seen. For the cooling the LNG (Liq-uefied Natural Gas) evaporation should be used.

In the course of the project, detailed recalculations of the design performance calculations and the part load calculations of the bidders have been executed and checked on plausibility.

A lot of further information is given by the Thermoflow Software, such as dimensions and weights of the equipment, auxiliary power con-sumers, single-line diagrams, 3D-Models (Figure 2), etc.

As shown with the example of the project Vasilikos, the capabilities of the software package of Thermo-

En

Er

gy

8

CyprUs

Vasilikos Power Station, Phase IV – Unit 5 CCGT, 220 MW

Picture 2: Vasilikos PP-Unit 4, Phase III, Site view from North to GTs, background HRSGs and Turbine Building, March 2010.

The Electricity Authority of Cyprus – EAC – has decided in 2005 to increase its power production by two new combined cycle gas turbine power plants on the area of the existing Vasilikos Power Station.

The Vasilikos Power Station site is located about 25 km east of Limas-sol on the south coast of Cyprus.

The power station consists of 3 x 130 MW steam-/oil-fired units plus one Frame 6B gas turbine (38 MW) burning distillate oil for peak power and emergency load (Phase I and II, see picture 3).

One dual-fired (natural gas/diesel) CCPP unit (Phase III – Unit 4, see picture 2) of about 220 MW was contracted in July 2006 with the Consortium J&P-AVAX/Hitachi Power Europe and started commer-cial operation in late 2009.

The additional Phase IV project (see picture 1) will incorporate the Unit 5 at a rating of approximately 220 MW dual-fired (natural gas/die-

sel) CCPP units to the existing Vasi-likos Power Station (VPS).

The already pre-designed Unit 6 has been postponed and is currently scheduled for 2013.

Lahmeyer International GmbH is providing the whole Consultancy Services for Vasilikos Power Station Phase IV – Units 5 & 6, consisting of

• Pre Contract Engineering & Con-ceptual Design Report

• Pre Qualification of Bidders • Elaborating Tender Documents• Assisting Tendering Stage• Technical Evaluation• Financial Evaluation• Award of EPC (Engineering, Pro-

curement, Construction) & LTSA (Long Term Service Agreement) Contract

• Design Review/Audits/Engineer-ing Services

• Workshop Inspection• Site Supervision• Commissioning up to FAT (Final

Acceptance Test)

The EPC contract was awarded in July 2009 to the Consortium J&P-AVAX/HPE comprising of the Greek company J&P-AVAX and the Ger-man Hitachi Power Europe. The LTSA contract was awarded at the same time to General Electric Inter-national Incorporated.

flow range from the first design dur-ing the study phase up to the detailed recalculation during the bid evaluation phase of a project.

The software package is revised and updated continuously by THER-

MOFLOW. With each update the lat-est innovative developments (new gas turbines, carbon capture tech-nologies, solar modules, etc.) are incorporated in the software and the cost data base also is updated every year.

Consequently, it is ensured that a solid basis for the whole range of applications is given where the soft-ware is used.

Wolfgang Eisenhart

Picture 3: Vasilikos PP, Phase I & II, site view from East.Picture 1: Vasilikos PP-Unit 5, Phase IV, Site view from North to GTs foundation work, background excavation of future Turbine House, March 2010.

En

Er

gy

9

The two new CCPP units are of the similar size to the ones used for Phase III (Unit 4), consisting each of two units type Frame 6FA+e – GT (GE), Heat Recovery Steam Genera-tor – HRSG (NEM) and the Steam Turbine Unit – STG (Alstom). All units under operation are now fired with light diesel oil. Finally it is scheduled to operate all 6 GT units from 2014 on with liquefied natural gas (LNG), supplied from a nearby future LNG plant (gas receiving and storage plant).

The total execution time for the completion and commercial opera-tion of the CCPP Unit 5 project,

including the engineering, erection, commissioning and testing is sched-uled to be within 30 months, finalised by the end of 2011.

The completion of the two gas tur-bines in open cycle mode is envis-aged for July 2011 after a period of 24 months. The erection work already started in November 2009.

This highly ambitious project is continuing with enormous commit-ment from all involved parties with an excellent working relationship with EAC and the EPC Consortium, that LI is confident in fulfilling stipulated dates.

Main Data:

• Phase I: net electrical 2 x 120 MWel

• Phase II: net electrical 1 x 120 MWel

• Phase III: net electrical 1 x 220 MWel

• Phase IV: net electrical 2 x 220 MWel

Pre-Contract Engineering: 2006–2009

Execution EPC: 2009–2011

Richard Wilhelm

The Saudi Electricity Company – SEC – is currently implementing the gas-fuelled Combined Cycle Power Plant „Qurayyah II“ in order to secure the power supply for the eastern parts of Saudi Arabia. The Power Plant is located approximately 100 km in the south of Dammam directly at the Persian Gulf and will supply a capacity of approx. 3,200 MW after completion.

The SEC assigned LI together with a local partner, Saudi Consult-ing Services – SAUDCONSULT – to execute the tasks project manage-ment, design review and site super-vision up to commissioning and handing over.

Since end of 2008 LI and Saud-consult execute their services on site with a team of 10 engineers and approx. 10 local inspectors. The team supports the implementation of the first phase of the project, which comprises the installation of 15 gas turbines Type 7FA (GE) with all nec-essary facilities. The works are exe-cuted under an EPC contract with the Arabian Bemco Contracting Ltd. – BEMCO –. The main components like gas turbines, generators, step-up transformers and several special parts had been ordered before under a sole procurement contract between SEC and General Electric –

GE. Till the upcoming “summer peak” 2010 all 15 gas turbines should be available to reliably supply power to the grid.

At the end of 2009 LI received the signal for the challenging second project phase in which the gas tur-bine power plant shall be extended to a combined cycle power plant consisting of 5 blocks. Each of the blocks is designed in a 3+1 configu-ration, i. e. three gas turbines with three downstream arranged heat recovery boilers deliver life steam to a condensing steam turbine.

The challenge in this project is the implementation of the new com-ponents to the already operating gas turbine power plant under the premise of minimising the effect on

system operation. The contractor is a consortium of BEMCO and Doosan Heavy Industries & Con-struction Ltd. – DOOSAN.

During this second project phase LI is integrated in the project from signature of the EPC contract (Sep-tember 2009) and assigned for the project management. During the important initial project stage meet-ings with all project members were organised and executed and execu-tion plans were defined and agreed upon.

The process of the design review has already been started in LI’s headquarter in Bad Vilbel, Germany. The site activities will fully commence shortly. The Consultant’s staff on site will be increased correspondingly with further local personnel. For this large-scale project the number of engineers and inspectors on site counts up to 50 and together with the cooperation with the client up to more than 80 people.

The tight and therefore very chal-lenging project execution plan envis-ages a construction phase of 40 months. Till February 2013 all five power plant blocks shall be handed over to the client.

Bernd Rößner

sAUdi ArAbiA

Qurayyah Combined Cycle Power Plant QCCPP II, 3.200 MW

Qurayyah CCPP II, site view.

Senn

ar

Bar

o

Bel

es

Kaj

bar

Dag

ash

Mog

rat

Mer

owe

Sher

eik

Kar

adob

i

Buj

agal

iK

alag

ala

Saba

loka

Ros

eire

s

Che

mog

a Ye

da

Asw

an

Ass

iut

Mub

arak

Pum

ping

Sta

tion

Ow

en F

alls

Del

ta B

arra

ges

Nag

a H

amm

adi

Sud

an

Liby

a

Nig

erC

had

Con

go, D

R

Egy

pt

Sau

di A

rabi

a

Eth

iopi

a

Iraq

Turk

ey

Tanz

ania

Ken

ya

Som

alia

Yem

en

Con

go

Cam

eroo

n

Gab

on

Syr

ia

Uga

nda

Cen

tral A

frica

n R

epub

lic

Tuni

sia

Erit

rea

Gre

ece

Jord

an

Italy

Isra

el

Arm

enia

Bur

undi

Rw

anda

Djib

outi

Kuw

ait

Equ

ator

ial G

uine

a

Cyp

rus

Leba

non

Gre

ece

Com

oros

Mal

ta

Sey

chel

les

Glo

rioso

Is.

Nile

Atbara

Blue Nile

White Nile

Nile

La

ke

Vic

tori

aL

ak

e V

icto

ria

La

ke

L

ak

e

Ta

ng

an

yik

aT

an

ga

ny

ika

La

ke

L

ak

e

Tu

rka

na

Tu

rka

na

La

ke

L

ak

e

Alb

ert

Alb

ert

La

ke

Urm

iaL

ak

e U

rmia

La

ke

Ta

na

La

ke

Ta

na

La

ke

Ch

ad

La

ke

Ch

ad

Cai

ro

Kam

pala

Khar

toum

Addi

s A

baba

La

ke

Ed

wa

rdL

ak

e E

dw

ard

La

ke

Ge

org

eL

ak

e G

eo

rge

40°E

40°E

30°E

30°E

20°E

20°E

10°E

30°N

30°N

20°N

20°N

10°N

10°N

0°0°

10°S

10°S

010

020

030

040

0km

Topo

grap

hic

data

: ES

RI 2

008

Hyd

rolo

gic

data

: US

GS

HY

DR

O1k

(1

km re

solu

tion)

GW

IFS,

201

0

Mub

arak

Pum

ping

Sta

tion

Abst

ract

ion

of la

rge

disc

harg

es fr

om L

ake

Nass

er to

sup

ply

Sout

h Va

lley

irrig

atio

n ne

ar

Tosh

ka D

epre

ssio

n

• Ten

der &

con

stru

ctio

n de

sign

for c

ontra

ctor

• Spe

cific

atio

ns fo

r ele

ctro

mec

hani

cal e

quip

men

t• A

ssis

tanc

e &

qua

lity

assu

ranc

e du

ring

con

stru

ctio

n

New

Nag

a H

amm

adi B

arra

ge

Con

stru

ctio

n of

a n

ew b

arra

ge w

ith

incl

usio

n of

a h

ydro

pow

er p

lant

with

64

MW

inst

alle

d ca

paci

ty

• Con

cept

ual &

feas

ibilit

y st

udy

• Hyd

raul

ic m

odel

test

s• E

nviro

nmen

tal i

mpa

ct a

sses

smen

t• T

ende

r des

ign

• Con

stru

ctio

n de

sign

& s

uper

visi

on

Kaj

bar D

am

Con

stru

ctio

n of

a d

am a

nd h

ydro

pow

er

plan

t on

the

3rd

Nile

Cat

arac

t w

ith s

ix g

ener

atin

g un

its

at 3

60 M

W in

stal

led

capa

city

• Fea

sibi

lity

stud

y• T

ende

r des

ign

& te

nder

ing

New

Ass

iut B

arra

ge

Con

stru

ctio

n of

a n

ew b

arra

ge i

nclu

ding

a

run-

of-r

iver

pow

er p

lant

with

4 b

ulb

turb

ines

w

ith 3

2 M

W to

tal i

nsta

lled

capa

city

• Hyd

raul

ic m

odel

test

s• E

nviro

nmen

tal a

nd re

settl

emen

t man

agem

ent

• Ten

der d

esig

n• A

ppro

val o

f con

stru

ctio

n de

sign

• Con

stru

ctio

n su

perv

isio

n

Mog

rat D

am

Con

stru

ctio

n of

a d

am a

nd h

ydro

pow

er

plan

t, so

me

18 k

m d

owns

trea

m o

f Abu

Ha

mad

, with

312

MW

inst

alle

d ca

paci

ty

• Fea

sibi

lity

stud

y• T

ende

r des

ign D

agas

h D

am

Con

stru

ctio

n of

a d

am a

nd h

ydro

pow

er

plan

t dow

nstr

eam

of t

he 5

th N

ile C

atar

act

with

312

MW

inst

alle

d ca

paci

ty

• Fea

sibi

lity

stud

y• T

ende

r des

ign Sh

erei

k D

am

Con

stru

ctio

n of

a d

am a

nd h

ydro

pow

er

plan

t on

the

5th

Nile

Cat

arac

t with

420

MW

in

stal

led

capa

city

• Fea

sibi

lity

stud

y• T

ende

r des

ign

& te

nder

ing

Saba

loka

Dam

Con

stru

ctio

n of

a d

am a

nd h

ydro

pow

er

plan

t on

the

6th

Nile

Cat

arac

t w

ith 2

05 M

W in

stal

led

capa

city

• Fea

sibi

lity

stud

y• T

ende

r des

ign Ros

eire

s D

am

Heig

hten

ing

of e

mba

nkm

ent d

ams

and

reha

bilit

atio

n of

the

hydr

opow

er p

lant

at t

he

Blu

e Ni

le w

ith 2

80 M

W in

stal

led

capa

city

• Det

aile

d de

sign

• Con

stru

ctio

n su

perv

isio

n

Del

ta B

arra

ge -

Ros

etta

Hydr

oele

ctric

pow

er p

lant

with

3 b

ulb

units

po

wer

hous

e w

ith 6

.7 M

W to

tal i

nsta

lled

capa

city

• Con

cept

ual s

tudy

• Fea

sibi

lity

stud

y• E

nviro

nmen

tal i

mpa

ct a

sses

smen

t

Del

ta B

arra

ge -

Dam

ietta

Hydr

oele

ctric

pow

er p

lant

with

3 b

ulb

units

po

wer

hous

e w

ith 1

3 M

W to

tal i

nsta

lled

capa

city

• Con

cept

ual s

tudy

• Fea

sibi

lity

stud

y• E

nviro

nmen

tal i

mpa

ct a

sses

smen

t• T

ende

r des

ign

• Con

stru

ctio

n su

perv

isio

n

Bel

es D

am

High

hea

d hy

drop

ower

pla

nt in

the

Ethi

opia

n Hi

ghla

nds

with

220

MW

inst

alle

d ca

paci

ty

• Fea

sibi

lity

stud

y

Che

mog

a-Ye

da D

am

High

hea

d hy

drop

ower

pla

nt in

the

Ethi

opia

n Hi

ghla

nds,

sta

ge II

89

MW

, sta

ge II

I 207

MW

• Fea

sibi

lity

stud

y• P

re-fe

asib

ility

stud

y fo

r irri

gatio

n de

velo

pmen

t

Kar

adob

i Dam

High

hea

d hy

drop

ower

pla

nt

with

8 x

200

MW

• Pre

-feas

ibilit

y st

udy

Bar

o D

am

High

hea

d hy

drop

ower

pla

nts

at B

aro

Rive

r w

ith a

tota

l ins

talle

d ca

paci

ty o

f som

e 60

0 M

W (B

aro

I 2 x

90

MW

, Bar

o II

3 x

150

MW

, G

enji

Div

ersi

on 2

x 9

0 M

W)

• Fea

sibi

lity

stud

y

Ow

en F

alls

Dam

Ow

en F

alls

ext

ensi

on, c

ompl

etio

n of

Kiir

a st

atio

n, m

onito

ring

of N

alub

aale

sta

tion

• Rev

iew

of c

ontra

ctor

's d

esig

n• S

ite s

uper

visi

on• E

labo

ratio

n of

mon

itorin

g m

anua

l• R

evie

w o

f mon

itorin

g re

ports

Buj

agal

i Dam

Run-

of-r

iver

pow

er p

lant

with

5 K

apla

n tu

rbin

es a

t 200

MW

inst

alle

d ca

paci

ty

• Rev

iew

of f

easi

bilit

y st

udy

• Ten

der d

esig

n• D

etai

led

desi

gn

Kal

agal

a D

am

Run-

of-r

iver

pow

er p

lant

with

5 K

apla

n tu

rbin

es a

t 343

MW

inst

alle

d ca

paci

ty

• Pre

-feas

ibilit

y st

udy

• Fea

sibi

lity

stud

y• E

nviro

nmen

tal i

mpa

ct a

sses

smen

t

Del

ta B

arra

ge -

Zefta

Hydr

oele

ctric

pow

er p

lant

with

3 b

ulb

units

po

wer

hous

e w

ith 5

,5 M

W to

tal i

nsta

lled

capa

city

• Fea

sibi

lity

stud

y

Hyd

ropo

wer

Pro

ject

s of

Lah

mey

er I

nter

nati

onal

in t

he N

ile

Bas

in

Bahr

el G

haza

l

Bahr el Jebel Vict

oria

Nile

Asw

an D

am

Reha

bilit

atio

n of

the

hydr

oele

ctric

pow

er

plan

t Asw

an I

with

7 K

apla

n ge

nera

ting

turb

ines

at 3

36 M

W to

tal i

nsta

lled

capa

city

• Rev

iew

and

ass

essm

ent

• Des

ign

of re

habi

litat

ion

mea

sure

s• S

uper

visi

on o

f reh

abilit

atio

n w

orks

Senn

ar D

am

Reha

bilit

atio

n of

the

dam

from

192

6, a

t the

B

lue

Nile

320

km

sou

thea

st o

f Kha

rtou

m,

with

low

hea

d hy

drop

ower

pla

nt

with

15

MW

inst

alle

d ca

paci

ty• O

ptim

izat

ion

of o

pera

tion

• Pre

-feas

ibilit

y st

udy

for r

ehab

ilitat

ion

The

Nile

is

with

a l

engt

h of

ove

r6,

500

kilo

met

res

the

long

est r

iver

inth

e w

orld

and

its

dra

inag

e ba

sin

cove

rs m

ore

than

3 m

illio

n sq

uare

kilo

met

res,

abo

ut 1

0% o

f th

e ar

eaof

Afri

ca (

gree

n ar

ea i

n th

e m

ap).

The

Nile

run

s al

mos

t per

fect

ly fr

omso

uth

to n

orth

thr

ough

a s

erie

s of

clim

atic

zon

es.

From

the

sou

ther

n-m

ost

sour

ces

at 4

° S

it c

ross

es a

sth

e on

ly p

erm

anen

t riv

er th

e S

aha-

ra,

the

larg

est

dese

rt of

the

wor

ldan

d re

ache

s th

e M

edite

rran

ean

Sea

at 3

1°N

.

The

Nile

is

fe

d by

tw

o m

ain

syst

ems:

The

Whi

te N

ile o

rigin

ates

in

the

Equ

ator

ial

Lake

P

late

au(B

urun

di,

Rw

anda

, Ta

nzan

ia,

Ken

ya a

nd U

gand

a).

Its r

emot

est

sour

ces

are

the

tribu

tarie

s of

the

Kag

era,

w

hich

its

elf

drai

ns

into

Lake

Vic

toria

. The

sec

tion

betw

een

Lake

Vic

toria

and

Lak

e A

lber

t is

calle

d Vi

ctor

ia

Nile

an

d af

ter

cros

sing

the

Sud

anes

e bo

rder

it is

know

n as

Bah

r el

Jeb

el. M

ore

than

50%

of t

he w

ater

eva

pora

tes

in th

eS

udd,

a v

ast

swam

p of

sou

ther

nS

udan

. A

fter

its j

unct

ion

with

the

Bah

r el

G

haza

l it

beco

mes

th

eW

hite

Nile

and

is jo

ined

by

the

Blu

eN

ile a

t Kha

rtoum

. The

sho

rter

Blu

eN

ile

star

ts

at

Lake

Ta

na

in

the

Eth

iopi

an

Hig

hlan

ds

and

cont

ri-bu

tes

toge

ther

with

the

Atb

ara

river

syst

em a

bout

90%

of t

he to

tal r

iver

disc

harg

e an

d ab

out

95%

of

the

sedi

men

t w

hich

ac

coun

ts

for

the

ferti

lity

of th

e N

ile d

elta

.

The

wat

er o

f th

e N

ile B

asin

ser

ves

as

livel

ihoo

d fo

r m

ore

than

40

0m

illio

n pe

ople

. Th

is

num

ber

isex

pect

ed t

o do

uble

by

2025

. B

utth

e po

pula

tion

of t

he t

en c

ount

ries

mak

ing

up

the

Nile

B

asin

ha

vedi

ffere

nt d

eman

ds fo

r wat

er a

nd a

reno

t eq

ually

dep

ende

nt.

Whi

le t

heco

untri

es o

n th

e up

per

Nile

pro

fitfro

m

high

er

prec

ipita

tion

the

41m

illio

n pe

ople

of

toda

y S

udan

rel

yon

the

Nile

for

abo

ut 7

5%.

The

78m

illio

n E

gypt

ians

ar

e ev

en

mor

ede

pend

ent

as t

hey

obta

in 9

7% o

fth

eir

fresh

wat

er fr

om th

e N

ile. M

ost

of th

is w

ater

is u

sed

for

agric

ultu

re,

86%

in E

gypt

and

99%

in S

udan

.

Lahm

eyer

In

tern

atio

nal

has

been

invo

lved

for

dec

ades

with

pro

ject

sal

l al

ong

each

of

th

e rip

aria

nco

untri

es in

the

deve

lopm

ent o

f the

Nile

Riv

er:

hydr

opow

er,

irrig

atio

n,flo

od

prot

ectio

n,

agric

ultu

re

and

wat

er s

uppl

y. T

hese

pro

ject

s ha

vebe

en

conc

eive

d by

La

hmey

erIn

tern

atio

nal

in

view

of

a

sus-

tain

able

and

env

ironm

enta

lly s

ound

deve

lopm

ent

of

the

Nile

B

asin

coun

tries

.

To a

chie

ve s

uch

goal

s, i

t ap

pear

sne

cess

ary

to h

ave,

apa

rt fro

m t

hest

ate-

of-th

e-ar

t en

gine

erin

g,

pro-

foun

d kn

owle

dge

of th

e cu

ltura

l and

relig

ious

ba

ckgr

ound

of

th

edi

ffere

nt

regi

ons

in

orde

r to

unde

rsta

nd t

he p

roje

ct n

eeds

but

also

the

need

s of

the

com

mun

ity o

fco

untri

es.

Kag

era

Mer

owe

Dam

Con

stru

ctio

n of

a d

am a

nd h

ydro

pow

er

plan

t dow

nstr

eam

of t

he 4

th N

ile C

atar

act

with

10

Fran

cis

turb

ines

at 1

250

MW

tota

l in

stal

led

capa

city

, com

plet

ed in

200

9• R

evie

w o

f fea

sibi

lity

stud

y• C

onst

ruct

ion

& te

nder

des

ign

• Con

stru

ctio

n su

perv

isio

n

12

WA

tE

r sUdAn

The Development of the River Nile in the Sudan – The Shereik and the Kajbar Hydropower Project

Within the framework of the „National Electricity Supply and Infrastructure Development Pro-gramme of the Sudan“, Lahmeyer International was contracted by the Dams Implementation Unit, DIU, in 2007 to prepare the feasibility stud-ies and the tender documents for both the Shereik and the Kajbar hydropower projects (HPPs) located on the River Nile.

As shown on the attached satel-lite picture, the Shereik HPP is located some 300 km upstream of the recently completed Merowe HPP, whose 10 power generating units with a total installed capacity of 1,250 MW will cover up to 70 % of the peak power demand in the Sudan. The Kajbar HPP will be located some 250 km downstream of the Merowe HPP, thus will benefit from the regulated outflow from the Merowe reservoir, which stores water for the irrigation of about 380.000 ha of fertile farm land.

The main structures of both hydropower projects may be sum-marized as follows:

The Shereik HPP:• a 240 m long powerhouse

accommodating 6 power gener-ating units (Kaplan turbines) with a total installed capacity of 420 MW;

• a 360 m wide and 39 m high spillway, designed to safely dis-charge a peak flood flow of 20,000 m³/s;

• an about 3,300 m long and 39 m high rockfill dam with a central earth core;

• two irrigation outlets, one on each bank of the River Nile, each designed to discharge 100 m³/s for irrigation purposes.

The Kajbar HPP:• a 230 m long powerhouse

accommodating 6 power gener-ating units (Kaplan turbines) with a total installed capacity of 360 MW;

• a 340 m wide and 36 m high spillway, designed to safely dis-

charge a peak flood flow of 19,900 m³/s;

• an about 2,250 m long and 31 m high rockfill dam with a central earth core.

Both projects will be provided with separate administration, service and SF6 gas-insulated switchgear buildings.

The average annual electric energy production and the total investment for both projects were calculated as about 4,000 GWh and 1.75 billion USD.

For both projects an international competitive tendering process was conducted in 2009, using the tender documents prepared by Lahmeyer International. Technical and financial proposals were received from 12 construction and supply companies from China for these projects. Prior to this international tendering proc-ess, DIU extended the engineering contracts of Lahmeyer International to include the conduct and manage-ment of the entire tendering proc-ess, the evaluation of the incoming proposals and the negotiation of the contracts jointly with DIU till the award of the corresponding con-struction contracts of both hydro-power projects.

At the time of printing, the evalu-ation of the proposals of both projects was carried out jointly by DIU and LI.

Egon Failer

Satellite image of the River Nile showing the Shereik HPP and Kajbar HPP sites, as well as the location of the Merowe HPP.

3-D model of the Shereik power house with Kaplan turbines.The Kajbar HPP site.

13

WA

tE

rgErmAny

Extension of Waldeck 2 Pumped Storage Plant

Lake Eder west of Kassel with its characteristic 50 m high arch gravity dam was built between 1908 and 1914 for flood protection and flow regulation of the Weser river. Already at an early stage the large 200 Mio. m³ reservoir has attracted the inter-est of hydropower planners. Since 1924 Hemfurth power plant (20 MW) harnesses the head between Lake Eder and Lake Affoldern, a regulat-ing reservoir directly downstream.

The large storage potential and the favourable topography with closely spaced high hills was the reason, the first German pump stor-age plant was built near Lake Eder. The Waldeck 1 Pumped Storage Plant with 4 ternary units (separate pump and turbine), each with an installed capacity of 35 MW, was commissioned in 1932. Lake Affol-dern forms the lower reservoir, while the upper reservoir is located on top of Peterskopf Hill, about 300 m above the lower reservoir. After more than 75 years of operation the units of Waldeck 1 were recently replaced by a modern 70 MW pump turbine, accommodated in a new shaft powerhouse (constructed from 2006 to 2009). Two turbines of the original plant were refurbished and are kept operational to provide regu-lating power. LI experts prepared the building permission applications and the functional tender docu-ments and supervised the construc-

tion, equipment installation and plant commissioning1.

A second scheme, the Waldeck 2 Pumped Storage Plant, was erected between 1969 and 1975. This cavern type scheme with two ternary units of 240 MW, which also utilizes Lake Affoldern as a lower reservoir, draws water from a sepa-rate upper reservoir on Ermerod Hill, some 30 m above the Waldeck 1 upper reservoir. This scheme has been rehabilitated and upgraded recently.

All mentioned plants are oper-ated by E.ON Wasserkraft GmbH.

Germany intends to increase the share of renewable energy con-sumed in the country to 30 % by 2030 and 50 % by 2050. This shall essentially be achieved by imple-menting large offshore wind parks. Thereby the varying demand on the consumer side will be confronted by variable power and considerable short-term fluctuations on the gen-eration side. More regulating reserve capacity must be provided to achieve an adequate balance and temporarily decouple electricity gen-eration and consumption.

Pumped storage schemes con-stitute the only mature, large-scale grid energy storage technique and are an indispensable tool for provid-

1 We reported about the project in aktuell No. 52 of

April 2007.

ing regulating reserve capacity. For that reason, an Extension of the Pumped Storage Plant of Waldeck 2 is now being considered by E.ON Wasserkraft.

In 2009 LI was commissioned to develop a technically, economically and environmentally optimised project concept within the scope of a conceptual study. Based on the study results and their own calcula-tions, E.ON Wasserkraft opted for a capacity increase of 300 MW with a variable speed pump turbine. The unit shall be installed in a separate powerhouse cavern (south of the existing cavern of Waldeck 2) and shall have its own tunnel waterways. Existing parts of the Waldeck 2 scheme can also be used for the extension.

In a very farsighted way the design of the existing Waldeck 2 already allows for an expansion, and, when constructing the scheme some 40 years ago, the required intake/outlet building for the exten-sion at the upper reservoir was built. Thus, the project can now be real-ised practically without operational restrictions to the existing plants.

In the beginning of 2010 E.ON Wasserkraft commissioned LI with the further project planning works.

Eder Dam and Lake Eder (photo: E.ON Wasserkraft).

Geotechnical investigations in winter 2009/2010, drilling works (photo: GTB Olpe).

14

WA

tE

r

The location of the project within the 57 km² Kellerwald-Edersee

National Park, which was inaugu-rated in 2004 to protect the copper

beach forest and the multitude of flora and fauna, requires special con-sideration in the planning process. Temporary impacts on the National Park have to be strictly minimised and environmentally compatible, while permanent impacts (e. g. by new structures) have to be avoided. The project has the favourable effect that – with the exception of parts of the intake/outlet building at the lower reservoir – all structures of the exten-sion can be located underground. Approval authorities, national park administration, as well as forest und nature conservation organisations, are periodically informed about the project and involved in the planning process.

The geotechnical investigations for the extension, which LI super-vised in cooperation with GTB Olpe, included four 280 to 350 m deep bore holes in the future cavern area. The results show geologically favour-able conditions for the realisation of the envisaged concept. Further investigations are planned for 2010.

Dr. Gerhard Eickmann

The Merowe Dam and Hydro-power Plant is located on the Nile River some 350 km north of Khar-toum and 550 km upstream of the Aswan High Dam in Egypt. The project serves several purposes: electricity generation from the 1,250 MW hydropower station; water releases to existing and planned irri-gation schemes (totalling some 380,000 ha); and flood protection in the Nile River itself. The sediment trapped by the Merowe Dam will reduce sedimentation within the Aswan High Dam in Egypt, and the power plant is also an economic green energy generation option with very low CO2 emissions.

In February 2002 LI was awarded the contract to provide engineering and contract administration services

sUdAn

Merowe Dam and Power Station – Assistance for Operation & Maintenance

Merowe Dam and Hydropower Plant (fig. 1).

Aerial view showing existing Waldeck 1 und Waldeck 2 schemes and planned extension (photo: E.ON Wasserkraft).

15

WA

tE

r

for the construction of the project. The contracts for construction of the dam, power plant and transmission system, totalling some € 1.5 billion (price level 2009), were awarded to international contractors from China and France between June and December 2003.

The first two of the ten power generating units came on stream in March 2009, and the final unit began commercial operation in early April 2010. During this 13-month build-up period the power plant has generated some 2,900 GWh of energy, representing a financial value of more than € 300 million. The cumulative operating hours and energy generated by each of the ten units over the build-up period are presented in figure 2.

The executing agency and owner of the plant, the Dams Imple-mentation Unit (DIU), is still in the process of establishing its operation and maintenance organisation and personnel for the project. Therefore in January 2009 LI was appointed to provide operational and technical expertise to support and train these DIU staff for a period of two years. The main objectives of this Technical Assistance (TA) contract are to:• review and advise DIU on the

establishment and management of the O&M organisation and staffing levels;

• provide Technical Assistance for the operation and maintenance of the dam and power plant (res-ervoir operation, dam safety monitoring, O&M activity sched-uling, tools and equipment, doc-umentation and guidelines, spare parts management, HSE matters etc.);

• manage and supervise compre-hensive programmes of training of the DIU O&M staff;

• develop and bring into operation a computer-based Management Information System (MIS) for the O&M activities.

The MIS will contain the informa-tion and guidelines concerning all the facilities which are to be oper-ated and maintained, and will allow operational data to be stored, retrieved and displayed for maxi-mum efficiency. The application of the MIS program therefore helps significantly to optimise the availabil-ity of the power plant and provides at any time a status overview. The MIS is split into ten modules (basic functionalities) with full intercommu-nication between them, as shown in figure 3. The most important mod-ules are:• Failure Reporting System: a

database system, to be operated primarily by the control room staff, to register and notify all details regarding malfunctions of the plant and the repair actions required, and providing mainte-

nance staff with a history of all malfunctions and repairs;

• Maintenance Reporting System: provides complete information support for all maintenance activities, based on the O&M manuals and the experience of senior O&M engineers, including detailed descriptions, resources (personnel, tools, materials, etc.) and time requirements for each inspection or maintenance action, maintenance work scheduling, information on com-ponent suppliers, and automatic reprogramming of future work on completion of each maintenance activity;

• Reservoir Operation: storage and display of all operational data from the reservoir/river (res-ervoir/tailwater levels, upstream hydrological gauging data), the various hydraulic gates in the dam (opening and discharge), the generating units (power out-put, turbine discharge) and all internal and external energy con-sumption/deliveries;

• Spare Part Management: provid-ing a full record of all spare parts and consumables, including supplier information, data on their application, exact storage locations, current stock levels, previous orders and observed delivery times, and performing continuous monitoring of the inventory and replacement scheduling.

Within the Merowe O&M organi-sation LI is providing, through these TA services, five long-term and up to six short-term experts at the Merowe facilities, with additional support from the head office staff as required.

Martin Brown

Cumulative operating hours and energy generated by Merowe hydropower units during build-up period (fig. 2).

Modular structure of

Manage-ment

Information System (fig. 3).

16

WA

tE

r

Poor land administration and land management are among the factors hindering sustainable devel-opment in many developing coun-tries. Rapidly growing cities on the one hand and the need for develop-ing agricultural land for food produc-tion on the other hand raise aware-ness that capable land admini stra - tion and management are needed in order to make best use of limited resources. This involves the use geo-graphical information systems and databases to manage efficiently the spatial data for administrative and management purposes.

The Republic of Senegal has obtained a donation from the Euro-pean Development Fund (EDF) in the framework of the EU’s “Good Gov-ernance Project” for the develop-ment and implementation of a new digital cadastre system for the Direc-tion du Cadastre of the Direction Générale des Impôts et des Domaines in Dakar. The system comprises a GIS, a database and interfaces to the national taxation system. The project was awarded to Lahmeyer International and carried out between 2007 and 2009 in three phases: analysis, development and implementation.

At the same time the Directorate of Cadastre had the occasion to reinforce the technical and profes-

sional standard of its staff, to amelio-rate the production and to organize future maintenance of the cadastral database and the GIS.

The design of the system was started by the elaboration of a con-ceptual model of the whole system, a model which covered at the same time the infrastructure, the hard- and software, the database and the nec-essary applications such as import and export of data as well as regular updates and data maintenance.

The data model used was an adapted version of the “Core Cadas-tral Domain Model” of the Interna-tional Federation of Surveyors (FIG) which can easily be customised according to particular requirements of any country.

The solution is mainly based on Open Source Software (OSS). OSS is increasingly used for the develop-ment of many applications in the pri-vate sector and in public administra-tion and proved to be cost-effective. In developing countries the use of Open Source Software was often limited to web hosting and web applications. Today cadastre tool-boxes based on OSS are increas-ingly developed and employed, which do not bind the user to a pro-prietary software product. The user or organisation remains independent

of software vendors and IT service companies as the code can be mod-ified by any qualified expert. This increases fair competition and will result in better implementations.

Much functionality has been directly implemented in the database on the server. Therefore the user is independent from particular GIS desktop software, which functions as a client to the server. The client components can either be Open Source desktop applications such as gvSIG, QuantumGIS etc. or a propri-etary desktop GIS like ESRI ArcGIS which was the case for Senegal.

PostgreSQL was chosen as Database Management System. Together with the PostGIS extension it proved to be well featured and flex-ible for the implementation of all requirements defined in the domain model.

The aim was to maintain valida-tion, versions and history of objects as well as other behaviour exclu-sively within the database. Validated objects are treated differently and in order to validate an object, certain requirements must be met. The vali-dation is carried out mainly through trigger functions which ensure integ-rity of the database during insert, update and delete procedures.

sEnEgAl

Design and Implementation of a New Cadastre System using Open Source Software

Senegalese cadastre experts with workstation.

Developed functions in ArcGIS such as printing of parcel extracts.

17

WA

tE

r

Topology constraints defined in the domain model are met by imple-menting verification routines in the database for individual spatial objects. For instance if a parcel has been changed or a new parcel is inserted into the database, trigger functions will automatically check for overlays of parcels and will snap boundary points of the changed parcel to existing boundary points in a user-defined tolerance.

In order to connect the ArcGIS

client to the PosgreSQL/PostGIS database the ZigGIS connector, based on Npgsql was used. This works not only for connections of multiple clients to the PosgreSQL/PostGIS database but also for multi-user editing.

An ArcGIS extension providing a user interface with additional func-tions was developed in C#. NHiber-nate, an object relational mapper (ORM) framework, was used to read/write data from/to the data-base from the client.

Advantages of ArcGIS are the layout and printing capabilities and the use of templates. Several func-tions were developed for automatic page layout generation and printing of parcel extracts on the basis of templates, which can be changed by the user without programming skills.

In the framework of the country-wide implementation of the system it

is planned that information will be served from the central database located at the Direction Générale des Impôts et des Domaines in Dakar to regional centres. Neverthe-less the data import and quality

check will be organised centrally as skilled operators are not available at regional level.

A Web Map Service (WMS) was configured and installed in order to serve maps directly to other organi-sations. At the same time a Geogra-phy Markup Language (GML) scheme has been defined in order to allow data exchange and interop-erability with other organisations, namely with the agency responsible for title registration. However these systems are still in the conceptual or development phase and practical tests could only be carried out on a “demonstration level”.

In the future more training for operators and for administrators is crucial. Local consultants were involved in the development and some changes could be carried out locally. Due to the availability of the source code of all developed com-ponents any contractor can update the application.

Klaus Sponer

Developed extension in ArcGIS.

Structure of the new cadastre system.

18

middlE EAst

Lahmeyer International creates New Ways for Transportation Systems

tr

An

sp

or

t

In Middle East, especially in the oil- and gas-rich states of the United Arab Emirates and Qatar, govern-ments have increased their invest-ment in the development of trans-portation systems in the last years, such as most modern railway net-works for regional and interregional transportation. Dubai recently impressed with the implementation of one of the most modern metro systems.

After already constructing the highest building in the world, the region now wants to have state-of-the-art transportation systems. Therefore, they need the support of the best and most experienced engineers in this sector. The label “Made in Germany” is very well respected in Arab countries and therefore the four largest railway engineering companies in Germany – Gauff, Lahmeyer, Obermeyer and Vössing – teamed up in a joint ven-ture in March 2010 as “German Rail-way Consult Middle East (GRC ME)”. Their aim was to bring together their competence, experience and resources in order to cover all project stages from masterplan until the start of operations.

The companies’ engineers, who have extensive development expe-rience, are prepared to effectively develop transportation systems worldwide, with particular emphasis on the Middle East. The expanding market in Qatar and neighbouring GCC-states are currently in focus.

At present, this joint venture is establishing a branch office in Doha, Qatar. LI already has branch offices in Doha and Abu Dhabi. The activ-ities of the joint venture will be grouped together and controlled from Germany.

The following are the main rail-way projects planned for the MENA region (see map):

• Gulf Co-operation Council: the six members states, Oman, UAE, Qatar, Bahrain, Saudi-Ara-bia and Kuwait, aim to be con-nected by a railway network;

• Saudi-Arabia: at present three large railway projects as well as

several metro networks are being built or being planned;

• Oman: a railway network con-necting Oman with UAE’s emir-ates of a total length of about 1,000 km for passenger and freight traffic is planned;

• UAE/Abu Dhabi Union Railway: metro as well as interregional lines, primarily for freight traffic, are planned for the Emirate of Abu Dhabi;

• Qatar: a comprehensive railway masterplan for regional and inter-regional transport should be implemented in the next few years. It includes a high speed line to Bahrain, light railway and metro lines, as well as a freight line to Saudi-Arabia;

• Kuwait: Four metro lines are planned for Kuwait City.

GRC ME has the comprehensive knowledge and experience needed to plan, manage and realise these complex projects. This covers the following engineering areas:• Masterplans and feasibility stud-

ies;• Preliminary design and construc-

tion planning, preparation of ten-der documents;

• Construction supervision and management, as well as interface management and commission-ing;

• Project management, risk man-agement, as well as claim-, change- and contract manage-ment.

„Creating new ways“ is GRC’s vision and its engineers want to cre-ate new paths in the region in many ways: by construction of new railway lines, use of new and innovative technology and grouping of various technical disciplines to implement a complete system. As mentioned by Michael Witt, Director of LI’s Trans-portation Division, “only in a partner-ship, the engineering companies mentioned above have a promising chance to compete against the glo-bal players in the highly competitive international market.”

During the last few decades LI has proven their transport know-how globally, having completed the planning for the airport extension at Frankfurt Airport, the connection from Cologne/Bonn Airport to the railway network, the construction of the ICE high speed line Frankfurt–Cologne, the main railway station in Berlin, metro lines in Athens, Bang-kok and Tehran, as well as new rail-way and metro lines in Bavaria, to mention just a few large projects.

Through the GRC ME joint ven-ture LI is predestined to participate in the implementation of new railway systems in the MENA region, in which approximately 100 billion Euros will be invested until 2025, as a strong partner.

In addition, the existing resour-ces in our energy division and our subsidiaries, especially in India, can be used efficiently.

Michael Witt

Railway projects in the MENA region.

19

Co

ns

Ult

ing

gr

oU

p

gErmAny

15th German Symposium on Dams in Aachen

From April 14 to 16, 2010 Ger-man and international dam experts met for a vivid exchange of experi-ence during the 15th German Sym-posium on Dams. Mr. Michael Heiland, who had been elected for president of the Deutsches Talsper-renKomitee (DTK) e.V. on occasion of the general meeting in November 2009, welcomed almost 500 attend-ees in Aachen, Germany.

Themed by “Dams in Change” 47 papers on the fields of planning, construction and operation as well as research and development ren-dered a broad spectrum of exper-tise. Hydroprojekt Ingenieurgesell-schaft (HPI) und Lahmeyer International (LI) contributed two papers each to the symposium: ‘Review and Adjustment of Dams to DIN Standard 19700’ and ‘Alara

Hydropower Plant, Turkey’ and ‘Baglihar Hydropower Plant, India’, ‘Pumped Storage Plant Waldeck I/ Rehabilitation of the Upper Reser-voir’. The papers had been pub-lished in WasserWirtschaft as well as

in publications of the institute “Wasserbau und Wasserwirtschaft (IWW)” of the TWTH Aachen Univer-sity.

HPI and LI again were amongst the 60 exhibitors on the accompany-ing exhibition.

A festive evening in the new Tivoli, the soccer stadium of Ale-mannia Aachen (soccer team) as well as the final excursion to four dams in the region of the German-Belgian border perfected the pro-gram of this year’s dam symposium.

Dr. Wolf-Dietrich WöhlertHydroprojekt Ingenieur-

gesellschaft mbH

Vivid exchange on the stand of HPI and LI during 15th German Symposium on Dams in Aachen.

Building services emerge enor-mous progression. Heating, air con-ditioning and electrical engineering are scopes of building services which have growing implication because of technological progress as well as in the subject area of sus-tainable building. Especially in rede-velopment building services are the major part of the investment.

Within these strategic considera-tions Lahmeyer Rhein-Main amplified another services sector after the foundation of the LCEE Life Cycle Engineering Experts GmbH last year.

For this reason Lahmeyer Rhein-Main GmbH acquired the inDIGO GmbH in the beginning of 2010 as a majority shareholder. An engineering consultancy for design and project supervision in the divisions:– building services– environment engineering– constructional engineering– structural design– accessorial services like Health

and Safety Coordination,

measurement or expert assess-ments

The executive board was enhanced by the management of Lahmeyer Rhein-Main. With about 30 staff members the company

headquarters is in the industrial monument Hammerkopfturm of the coal mine ‘Minister Stein’ in Dort-mund. Web adress: www.indigo-service.de.

Charlotte Baumann-Lotz

gErmAny

Advanced Service Range at Lahmeyer Rhein-Main

Industrial Monument Hammerkopfturm of the coal mine ‘Minister Stein’, Dortmund.

Lahmeyer International GmbHFriedberger Str. 173 61118 Bad Vilbel Germany

Tel.: +49 (61 01) 55-0 Fax: +49 (61 01) 55-22 22 E-mail: [email protected]: www.lahmeyer.de

Lahmeyer - Aktuell 2010 08

Documents

Transcript of Lahmeyer - Aktuell 2010 08