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Chelelektu

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Melka Lole

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Bukisa

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Toylo

BonkeBeza

GentaBelta

Gayle

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Gelela

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DonkiLaska

Bulki

SezegaYela

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WuloKode

MelaNehaBelta

Laha

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Ag-Ma-2

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BH8

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38°0'0"E

37°0'0"E

37°0'0"E

6°0'0"

N

6°0'0"

N

40

40

50

50

60

60

70

70

80

80

90

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00

10

10

20

20

30

30

40

40

50

50

60

60

70

70

80

80

90

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10

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20

20

80 80

90 90

00 00

10 10

20 20

30 30

40 40

50 50

60 60

70 70

80 80

90 90

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10 10

240

240000m.E

250

250

260

260

270

270

280

280

290

290

300

300

310

310

320

320

330

330

340

340

350

350

360

360

370

370

380

380

390

390

400

400

410

410

420

420

5 8000

0m. N

580

590 590

600 600

610 610

620 620

630 630

640 640

650 650

660 660

670 670

680 680

690 690

700 700

710 710SODO - AWASA

HOSAINA-ASELA

KONSO - YABELO

ARBA MINCH - AGRE MARRYAM

DILADIME

BAKO

JIMMA

ARJO

YABELO

HOSAINA ASELA

NEGELEAHEREMARIAM

WACHILE

NAZRET

ISTIFANOS HAYK

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Wajifo Bedesa

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Kofele

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SigigaSisota

KenchoMetsir

Dimele

Benata Arguba

GelaboAlduba

Didiga

Doketu

Shefete

Sokicha

Dumerso

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Aykamir

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MashileSek'ama

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Mecheke

Chileshe

Chebicha

Boshkoro

Bekawile

Mela Neha

Wulo Kode

Wib Hamer

Adis Kofe

Zaba No.2

Jeba Sire

Bonke BezaYetnebersh

Zala Debech

Gulta Yarte

Adis Ketema

Hamus Gebeya

Chorso Golja

Gato Fuchicha

Birbir MariyamZada

Kele

Tore

Beto

Bule

Dila

Kemba

Laska

Wacha

Zefne

Dimeka

Soyema

Gidole

Gerese

Chencha

Guanguwa

Key Afer

Selam Ber

ChelelektuArba Minch

Agere Mariyam

L. Abaya

L. Chamo

300000

300000

400000

400000

6000

00

6000

00

7000

00

7000

00

AQUIFER SURFACE CONTOUR

INDEX MAP

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1700 1800 190

0

900800

1000

700

2100

2000

1300

2200

600

1600

2300

1500

1400

2400

2600

2400

2 000

1500

1300

1400

2100

1100

1300

2000

1600

1600

1200

1400

2400

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Burka

Segen

River

Gelana

Sala

Sego

Iyanda

Dara

Gina

Sile

Koma

Kong

a

Kebeda

Sermele

Zekusa

Gidabo

Bele

Sayad

o

Gorsa

L. Abaya

L. Chamo

Ezo

Has

Laha

Yela

Dita

Layl

MehoKoti

Dido

Resa

FogeHaru

Mora

GiweAbel

PilaBaya

BakoGeza

KureAlga

Kako

Gato

MorkaBelta

GeltaBulkiLaskaDonki

Otolo Gayle

Belta Genta

Toylo

Holjo

AdameShara

KongaGerseLante

GerdaTolta

ZombaShele

Gedeo

DerbaZeyse

Kaysa

Gembo

FashaKolme

Weyto

Myzelo

Sezega

Gelela

Wajifo Bedesa

Andida

Kofele

KedidaWidese

SigigaKenchoMetsir

Dimele

Benata Arguba

GelaboAlduba

Didiga

Doketu

ShefeteSokicha

Dumerso

Wachile

Ononcho

GetamirCh'ep'o

Aykamir

Arkesha

MashileSek'ama

Delbena

Mecheke

Chileshe

Boshkoro

Mela Neha

Wulo Kode

Wib Hamer

Adis Kofe

Zaba No.2

Bonke BezaYetnebersh

Zala Debech

Gulta Yarte

Hamus Gebeya

Chorso Golja

Gato Fuchicha

Birbir MariyamZada

Kele

Tore

Beto

Bule

Dila

Kemba

Laska

Wacha

Zefne

Dimeka

Kebado

Soyema

Gidole

Gerese

Chencha

Guanguwa

Key Afer

Selam Ber

ChelelektuArba Minch

Agere Mariyam

300000

300000

400000

400000

6000

00

6000

00

7000

00

7000

00

HYDROGEOLOGICAL MAP OF ARBA MINCH - AGRE MARRYAM AREA

0 20 4010km

The topographical map is based on Ethiopian Mapping Agency (EMA), 1979, 1994, 1995 and 1997Geological Map of the Ethiopian Rift,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1981Hydrogeology of the Lakes Region, Ethiopia (Lakes Ziway, Langano, Abiyata, Shalla and Awassa),Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1982Geological Map of Omo River Project area,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1983Geothermal Exploration Project Ethiopian Lakes District Rift, exploitation of Langano-Aluto geothermal resources, Feasibility report,Ministry of Mines and Energy, elc electroconsult, Italy,1986Geology of Agere Maryam Area,Geological Survey of Ethiopia (GSE),1994Hydrogeological, geophysical and engineering Geological Investigation of Yabelo Sheet,Geological Survey of Ethiopia (GSE),2000Hydrogeological and Engineering Geological Investigation of Chew Bahir Sheet,Geological Survey of Ethiopia (GSE),2000Geological Map of the Ziway - Shala Lakes Basin,Dainelli et al., Department of Earth Sciences, University of Florence, Italy,2001Geothermal resource Exploration in Abaya and Tulu Moye Gedemisa geothermal Prospects, Main Ethiopian Rift,Geological Survey of Ethiopia (GSE),2002Hydrogeology and Engineering Geology of Awassa Lake Cachement,Geological Survey of Ethiopia (GSE),2003Geology Yabelo MapSheet,Geological Survey of Ethiopia (GSE),2007Butajira-Ziway Area Development Study Project, Hydrogical Map,Ministry of Water Resources, Ethiopian Water Technology Center (EWTEC),2008Geological map of Rift Valley Lakes Basin,Ministry of Water Resources, Halcrow and GIRDC,2008

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DerbaZeyse

Kaysa

Gembo

FashaKolme

Weyto

Myzelo

Sezega

Gelela

Ilacha

Wajifo Bedesa

Andida

Kofele

Bekero

KedidaWidese

SigigaSisota

KenchoMetsir

Dimele

Benata Arguba

GelaboAlduba

Didiga

Doketu

Shefete

Sokicha

Dumerso

Wachile

Ononcho

GetamirCh'ep'o

Aykamir

Arkesha

MashileSek'ama

Delbena

Mecheke

Chileshe

Chebicha

Boshkoro

Bekawile

Mela Neha

Wulo Kode

Wib Hamer

Adis Kofe

Zaba No.2

Jeba Sire

Bonke BezaYetnebersh

Zala Debech

Gulta Yarte

Teferi Kela

Adis Ketema

Hamus Gebeya

Chorso Golja

Gato Fuchicha

Birbir Mariyam

L. Abaya

L. Chamo

Zada

Kele

Tore

Beto

Bule

Dila

Kemba

Laska

Wacha

Zefne

Dimeka

Soyema

Gidole

Gerese

Chencha

Guanguwa

Key Afer

Selam Ber

ChelelektuArba Minch

Agere Mariyam

300000

300000

400000

400000

6000

00

6000

00

7000

00

7000

00

THE STUDY ON GROUNDWATER RESOURCES ASSESSMENT IN THE RIFT VALLEY LAKES BASINJAPAN INTERNATIONAL COOPERATION AGENCY (JICA)

Hydrogeological Map March 2012

FLUORIDE CONCENTRATION MAP

GEOLOGICAL MAP

SCALE 1:250,000 TRANSVERSE MERCATER PROJECTIONSCALE 1:1,000,000

SCALE 1:1,000,000

SCALE 1:1,000,000 0 20 4010 km

0 20 4010 km

0 20 4010 km

1Description

2

5

4

No.

Extensive aquifers with fracture and/or karstic permeability

Consolidated sediments and metamorphosed carbonate; Limestone, sandstone, shale, marl, evaporate marble

Localized aquifers with fracture and intergranular permeabilityMain geothermal areas Common occurrence of

thermal groundwater in fractured volcanic rocks and subordinate unconsolidated sediments

Volcanic rocks, basalts, rhyolites, trachytes, ignimbrites

A

ABC

High, moderate, low (A, B, C)(Note: Not applicable in this map)

ModerateLow

Moderate or high productivity (A,B)(Note: Not applicable in this map)

HighModerate

LowPoor

LowNon carbonate metamorphic rocks, granitic intrusives,dolerites

CB

HighUnconsolidated sediments, alluvium, elluvium, colluvium, lacstrine sediments, poorly cemented sandstone

Extensive aquifer with intergranular permeability

Productivity ClassesLithology

CD

Extensive aquifers with fracture permeability

3

VERTICAL SCALE = 10 x HORIZONTALSCALEN

J K

N'

K'J'

Upper Aquifer Surface Contour 100m interval 1000m interval

K e n y aK e n y a

600

500

2,400

2,300

2,200

2,100

2,000

1,900

1,800

1,700

1,600

1,500

1,400

1,300

1,200

1,100

1,000

900

800

700

100,00090,00080,00070,00060,00050,00040,00030,00020,00010,0000 2000,000190,000180,00017 0,00016 0,000150,000140,000130,000120,000110,000 3000,000290,000280,00027 0,00026 0,000250,000240,000230,000220,000210,000 380,000 390,00037 0,00036 0,000350,000340,000330,000320,000310,000

BH4ABBH10

BH9N

Tiliku Dedaba R. Laftu R. Melka Oda R. Denbi R. Tikur Wiha R. Gidabo R. Kola R. Gigesa R. Dara R. Sala R.

Burka R. Burka R.Arsi Negele Shashemene Awasa Leku Dila Guanguwa Chelelektu Tore Agere Mariyam

Langano Lake

Lake

CBH9N

DBH3

E IJYir-Ch-2

KAg-Ma-2

LT10-2Konga R.

Yirga Chefe

rht

Pm

tbW

Gba N2b

rhtrht

N2b

N2b

WY

ob

tbtb

rhlac2 lac2 lac2Al

rh

rh

Y W W GG

W

rhba

PgsNgm

Pgl

Pgs

PgsPgs

Pgl

Pgl

Pre

Pgs

Q Q Q Pre

Pgl

Pre

Q

QNgm

Ngm

N1-2n

batbG

ba ba

baob

lac1

N1_2n

N1_2nN1_2n

N1_2n

Pm

QVolob

W GAl

600

500

2,400

2,300

2,200

2,100

2,000

1,900

1,800

1,700

1,600

1,500

1,400

1,300

1,200

1,100

1,000

900

800

700

2,900

2,800

2,700

2,600

2,500

2,400

2,300

2,200

2,100

2,000

1,900

1,800

1,700

1,600

1,500

1,400

1,300

1,200

1,100

1,000

900

800

MBH7

INYir-Ch-2

Kulfo R. Gina R. Gelana R.

Abaya Lake

Arba Minch

Yirga Chefe

baPgs

Pgs

PglPgl

Pgl

PglPgl Pgl

Pgl

PglPglPgl

Pgl

Pgs

PgsPgs

Ngm

Pre

Ngm Ngm

baPgs

Pgs

PglPgl

Pgl

PglPgl Pgl

Pgl

PglPglPgl

Pgl

Pgs

PgsPgs

Ngm

Pre

Ngm Ngm

NgsQ

2,700

2,600

2,500

2,400

2,300

2,200

2,100

2,000

1,900

1,800

1,700

1,600

1,500

1,400

1,300

1,200

1,100

1,000

900

800

MBH8

Segen R.

NAg-Ma-2

Segen R.Q

QPglPgl

PglPgl

Pgl

Pgl

Pgl

Pgl Pgl

Pre PreQ

Q Q

Q

QQ

Ngu

Fluoride [mg/l] 0.0 - 1.5 1.5 - 3.0 3.0 - 10.0 10.0 -

Al

Q

lac2

Pm

Vol

rb

lac1

Holocene

Pleistocene Y

ob

W

G

tb

ba

lake

Plio-Pleistocene

N2b

NQs

Miocene

rht

N1_2n

N1n

N1ar

Ngs

Ngu

Ngb

Ngm Eocene-Oligocene Pgs

Pgl MESOZOIC

Pre PRECAMBRIAN

Pliocene

Geology

Mes

rh

A

Borehole (Well)Total depth [mbgl]

Static water level [m]Draw down [m]

Specific capacity [l/min/m]

!@ JICA Well

RoadsAsphaltGravel

Towns!. Region Capital!. Zone Capital

Geological StructureMajor fault, downthrown shownMajor faultNormal fault, downthrow shownNormal faultInferred fault, downthrown shownInferred faultMajor fault, downthrown shown, by satellite imagesMajor fault, by satellite imagesNormal fault, downthrow shown, by satellite imagesNormal fault, by satellite imagesInferred fault, downthrown shown, by satellite imagesInferred fault, by satellite imagesGeology boundaryInferred geology boundary

#* Volcano / Volcanic Cone

RiversMajor Rivers

LakesSwampLake

Basin Boundary

Spring Discharge [l/s]0.01 - 0.750.75 - 2.502.50 - 6.006.00 - 16.00

Caldera edge

!( Developed Area

Boundaries

National Boundary

TEM_̂

Survey Point of Transient-phenomenon (or Time-domain) Electromagnetic Exploration Method

16.00 -

!. Woreda Capital

Biotite Gneiss, Granite, Biotite MetagraniteBiotite Gneiss, Pegmatite;

Sandstone, Shale and LimestoneAdigrat Sandstone, Antaro Limestone;

Porphyritic basalt lavasLower Basalt; Densely-welded rhyolitic welded tuffShole Welded Tuff;

Porphyritic basalt lavasMiddle Basalt; Lapilli tuff with minor laminated tuffBeyana Tuff; Porous basalt lavasUpper Basalt;

Rhyolite piles and necksSharenga Rhyolite;

RhyoliteN1ar Rhyolite;

Anchar BasaltN1n Basalt;

Plagiocrase rhyolitic tuff, pumice tuff and crystal tuffN1_2n Rhyolitic Tuff;

Plagiocrase rhyolite tuff and rhyolite lava flows containing obsidianN1_2n Rhyolitic Volcanics;

Rhyolitic tuffsNQs Rhyolite;Basalt lavas and basaltic pyroclasticsN2b Basalt;

Rhyolite lava flows and rhyolitic tuffsGademotta Rhyolite;

Lake deposits such as sand stone and alternate layerLekansho Lacustrine Deposits;

Massive basalt lavasOgolche Pleistocene Basalt;

Basaltic tuff breccias and lapilli tuffsAdami Tulu Basaltic Pyroclastics; Rhyolitic to andestic welded tuffGonde Strongly Green Welded Tuff; Rhyolitic tuffs and pumice tuffsKetar River Acidic Volcanic Sedimentary Rocks;

Rhyolitic to andestic welded tuffKulumusa Highly Welded Tuff; Yellowish white rhyolitic pumice tuffLangano Poorly Welded Pumiceous Pyroclastics;

Lake deposits such as poorly-sorted gravel, sand, pumice, tuff, and volcanic sandMeki Lacustrine Deposits;

Basalt lavas and reddish brown basaltic scoriaButajira Recent Basalt; Rhyolite lava flows and Obsidian lava flowsCorbetti Rhyolitic Volcanics; Pumice falls and pumice flow depositsCorbetti Pumice Flow & Fall Deposits; Lake deposits such as gravel, sand and mudBulbla Lacstrine Deposits;

Sandy gravel-mudUnclassified Fluvial Deposits;

Fine sand - mudAlluvium;

Geology Al Q

lac2 Pm Vol rb

lac1

Y ob W G tb ba

lake

Alluvium; Fine sand - mud Unclassified Fluvial Deposits; Sandy gravel-mud Bulbla Lacstrine Deposits; Lake deposits such as gravel, sand and mud Corbetti Pumice Flow & Fall Deposits; Pumice falls and pumice flow deposits Corbetti Rhyolitic Volcanics; Rhyolite lava flows and Obsidian lava flows Butajira Recent Basalt; Basalt lavas and reddish brown basaltic scoria Meki Lacustrine Deposits; Lake deposits such as poorly-sorted gravel, sand, pumice, tuff, and volcanic sand

Langano Poorly Welded Pumiceous Pyroclastics; Yellowish white rhyolitic pumice tuff Kulumusa Highly Welded Tuff; Rhyolitic to andestic welded tuff Ketar River Acidic Volcanic Sedimentary Rocks; Rhyolitic tuffs and pumice tuffs Gonde Strongly Green Welded Tuff; Rhyolitic to andestic welded tuff Adami Tulu Basaltic Pyroclastics; Basaltic tuff breccias and lapilli tuffs Ogolche Pleistocene Basalt; Massive basalt lavas Lekansho Lacustrine Deposits; Lake deposits such as sand stone and alternate layer

Holocene

Pleistocene

rh

N2b NQs

rht N1_2n N1n N1ar

Ngs Ngu Ngb Ngm

Pgs Pgl

Mes

Pre

Gademotta Rhyolite; Rhyolite lava flows and rhyolitic tuffs N2b Basalt; Basalt lavas and basaltic pyroclastics NQs Rhyolite; Rhyolitic tuffs

N1_2n Rhyolitic Volcanics; Plagiocrase rhyolite tuff and rhyolite lava flows containing obsidian N1_2n Rhyolitic Tuff; Plagiocrase rhyolitic tuff, pumice tuff and crystal tuff N1n Basalt; Anchar Basalt N1ar Rhyolite; Rhyolite

Sharenga Rhyolite; Rhyolite piles and necks Upper Basalt; Porous basalt lavas Beyana Tuff; Lapilli tuff with minor laminated tuff Middle Basalt; Porphyritic basalt lavas

Shole Welded Tuff; Densely-welded rhyolitic welded tuff Lower Basalt; Porphyritic basalt lavas

Adigrat Sandstone, Antaro Limestone; Sandstone, Shale and Limestone

Biotite Gneiss, Pegmatite; Biotite Gneiss, Granite, Biotite Metagranite

Plio-Pleistocene

Pliocene

Miocene

Eocene-Oligocene

MESOZOIC

PRECAMBRIAN