Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND...
-
Upload
willa-miles -
Category
Documents
-
view
220 -
download
0
Transcript of Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND...
![Page 1: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/1.jpg)
Hanoi, January 27th 2015
Enrico WeberDEIB – Politecnico di Milano
IMRR ProjectINTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF
RED-THAI BINH RIVER SYSTEM
IN A CHANGING CLIMATE
4. Reservoirs and power plants models
![Page 2: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/2.jpg)
Main reservoirs in the Red River Basin
Strategic reservoirs:• Son La• Hoa Binh• Tuyen Quang (Na
Hang)• Thac Ba
Medium reservoirs (on Da river basin):• Lai Chau• Ban Chat, • Huoi Quang
Not
considered
![Page 3: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/3.jpg)
Essential condition
The model simulation must be extremely fast:
1 year in few milliseconds
We got 3 10-3 sec
![Page 4: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/4.jpg)
Features of reservoirs
• the active (or live) storage
• The stage-discharge curve of the spillways and bottom gates, the intake tower, the penstock curve
By the management point of view a reservoir is characterized by: TuyenQuang
![Page 5: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/5.jpg)
Causal network
tS
1tE1te
1ts 1t
a 1tr t
u
1th
ts
r depends on a and e
st = storage volume at time t
at+1 = inflow volume in [t ,t+1)
et+1 = specific evaporation in [t ,t+1)
rt+1 = effective release volume in [t , t+1)
![Page 6: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/6.jpg)
Mechanistic model
surface
Dung tích hồ [m3]
Diệ
n tíc
h m
ặt n
ướ
c hồ
[km
2 ]TuyenQuang
![Page 7: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/7.jpg)
Mechanistic model
ttt sSeE 11 evaporation
tt sSS surface
storage
![Page 8: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/8.jpg)
Mechanistic model
ttt sSeE 11 evaporation
tt sSS surface
1111 ttttt rEass storage
tt shh level
111 ,,, tttttt EausRrreleaseTuyenQuang
![Page 9: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/9.jpg)
Mechanistic model
evaporation
tt sSS surface
1111 ttttt rEass storage
level
111 ,,, tttttt EausRrrelease
11111 ,,, tttttttttt eausRsSeass
![Page 10: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/10.jpg)
Instantaneous storage-discharge relationships
• s* : storage corresponding to the spillway position
s*
spillway
s(t)
( )r t
TuyenQuang
minimum release
![Page 11: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/11.jpg)
Instantaneous storage-discharge relationships
s*
spillway
open gates
minimum release
s(t)
( )r t
TuyenQuang
![Page 12: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/12.jpg)
Instantaneous storage-discharge relationships
• s min , s max : bounds of the regulation range
s min s max s*
spillway
open gates
maximum release
minimum release
s(t)
( )r t
From this information the function
R t (s t
,u t ,a t+1 ,e t+1 )
is obtained.
![Page 13: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/13.jpg)
Legal constraintsMinumum and maximum (unconstrained) release
legal constrains
Jun 15th - Jun 25th, early flood-period
Before June 25th, if Hoa Binh reservoir level is at 107 m and the Hoa Binh inflow is predicted to be higher than 4,000 m3/s, Son La reservoir is allowed to use the storage between 200 m and 205 m to prevent Hoa Binh reservoir level from exceeding 107 m.
WHAT TO DO?
Son La
![Page 14: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/14.jpg)
st+1 = st +at+1 - Et+1 - rt+1
at+1 = inflow volume [t ,t+1)
Inflow calculation
t t +1
at+1
we assume it uniformly distributed
st = storage volume at time t
Et+1 = evaporation volume in [t , t+1)
a
rt+1 = volume actually released in [t , t+1)
at+1 = st+1 - st + Et+1 + rt+1
![Page 15: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/15.jpg)
st+1 = st +at+1 - Et+1 - rt+1
at+1 = inflow volume [t ,t+1)
Inflow calculation
t t +1
at+1
we assume it uniformly distributed
st = storage volume at time t
Et+1 = evaporation volume in [t , t+1)
a
rt+1 = volume actually released in [t , t+1)
at+1 = st+1 - st + Et+1 + rt+1
from energy measures
![Page 16: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/16.jpg)
st+1 = st +at+1 - Et+1 - rt+1
at+1 = inflow volume [t ,t+1)
Inflow calculation
t t +1
at+1
we assume it uniformly distributed
st = storage volume at time t
Et+1 = evaporation volume in [t , t+1)
a
rt+1 = volume actually released in [t , t+1)
at+1 = st+1 - st + Et+1 + rt+1
from level measures
![Page 17: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/17.jpg)
st+1 = st +at+1 - Et+1 - rt+1
at+1 = inflow volume [t ,t+1)
Inflow estimation
t t +1
at+1
we assume it uniformly distributed
st = storage volume at time t
Et+1 = evaporation volume in [t , t+1)
a
rt+1 = volume actually released in [t , t+1)
at+1 = st+1 - st + Et+1 + rt+1
?
![Page 18: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/18.jpg)
An example: HoaBinh
st+1 = st +at+1 - Et+1 - rt+1
Historical reservoir storageEstimated reservoir storage
EVN estimates
![Page 19: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/19.jpg)
An example: HoaBinh
Historical reservoir storageEstimated reservoir storage
x 4.53
st+1 = st +at+1 - Et+1 - rt+1
![Page 20: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/20.jpg)
An example: HoaBinh
x 4.53
st+1 = st +at+1 - αEt+1 - rt+1
Historical reservoir storageEstimated reservoir storage
![Page 21: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/21.jpg)
Hydropower plant
![Page 22: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/22.jpg)
Hydropower plant model
Hazen-Williams formula [Gardner Stewart.W [1920]
for each turbine for the whole plant
net head
Tuyen Quang
![Page 23: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/23.jpg)
The stage function can be more complex: SonLa
Influence of Hoa Binh reservoir level
Historical Son La downstream level
Historical Hoa Binh reservoir levelEstimated Son La downstream level
1/1/2011 - 31/07/2012
![Page 24: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/24.jpg)
Hydropower plant model
turbine efficiency η η = (q,H) orη = (p,H)
Characteristic curve of a turbine of Tuyen Quang power station
Sources:EVN
for each turbine for the whole plant
![Page 25: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/25.jpg)
Tuyen Quang
Optimal turbines allocation
the efficiency of the two turbines must be equal
If all the turbines are identical, it follows that they must all be fed with the same flow.
the total flow Q has to be equally split among m turbines, where m is the number of turbines that maximizes the total generated power P, given the net head H
![Page 26: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/26.jpg)
Optimal hours allocation
Ej energy production generated by splitting the volume R in j hours
For a given H
1 hour
2 hours
3 hours
Tuyen Quang
The distribution in time has nothing conceptually different from the distribution among the turbines.
Optimality condition: the efficiency must be the same for every turbine and every instant of times
If the net head H were know
![Page 27: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/27.jpg)
Optimal hours allocation
Solve the system numerically for any j and (R,hr)
However, the net head H is not known in advance: it depends upon the volume R (which influences the downstream level hd) and the flow q through the turbines (which, due to the optimality condition, must be the same in each hour and each turbine).
hr = 95
hr = 105
Tuyen Quang
![Page 28: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/28.jpg)
From mechanic to electrical energy
http://www.snowyhydro.com.au
Tuyen Quang
Error = -
maximum (electrical) energy that can be generated if:
the released volume Rt in day t is
know since the start of the day
the reservoir level hr remains stationary for the whole day
efficiency of the generator
![Page 29: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/29.jpg)
Tuyen Quang
Error = -
Final tuning
http://www.snowyhydro.com.au
maximum (electrical) energy that can be generated if:
the released volume Rt in day t is
know since the start of the day
the reservoir level hr remains stationary for the whole day
efficiency of the generator
depends on the diameter and the type of material of the penstock Estimate θ
![Page 30: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/30.jpg)
maximum (electrical) energy that can be generated if:
the released volume Rt in day t is
know since the start of the day
the reservoir level hr remains stationary for the whole day
Tuyen Quang
Error = -
Final identification
http://www.snowyhydro.com.au
Tuyen Quang
![Page 31: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/31.jpg)
HoaBinh
Www.wikimapia.org
![Page 32: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/32.jpg)
Hoa Binh validationError = - 3 year moving windows
efficiency
![Page 33: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/33.jpg)
Hoa Binh validationError = - 3 year moving windows
prior the year 2009
efficiency
![Page 35: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/35.jpg)
Son La validation
Togliere verde
![Page 36: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/36.jpg)
Son La validation
1
2
3
4
5
turbines
![Page 37: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/37.jpg)
Son La validation
1
2
3
4
5
turbines
![Page 38: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/38.jpg)
wikipedia.org
TuyenQuang
![Page 39: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/39.jpg)
Reservoir: release function (1)
before July 2012
![Page 40: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/40.jpg)
Reservoir: release function (1)
Historical downstream levelEstimated downstream level
2002-2012
Historical data
![Page 41: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/41.jpg)
Chiem Hoa reservoir
![Page 42: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/42.jpg)
Reservoir: release function (1)
before July 2012
declared to be valid after July 2012
![Page 43: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/43.jpg)
Reservoir: release function (1)
before July 2012
declared to be valid after July 2012
proposed
![Page 44: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/44.jpg)
Van Coc diversion
![Page 45: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/45.jpg)
Scheme of RTBR system
Van Coc diversion
![Page 46: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/46.jpg)
![Page 47: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/47.jpg)
Van Coc rules
• Opening
When
hHNt > 12.8 m and (hHN
t+1 > 13.4 or hHNt+2 > 13.4)
• Closing
When
hHNt < 13.4 m and (hHN
t+1 < 13.4 and hHNt+2 < 13.4)
The detention basin dynamics is assumed to be negligeable
^ ^
^ ^
![Page 48: Hanoi, January 27 th 2015 Enrico Weber DEIB – Politecnico di Milano IMRR Project INTEGRATED AND SUSTAINABLE WATER MANAGEMENT OF RED-THAI BINH RIVER SYSTEM.](https://reader035.fdocuments.net/reader035/viewer/2022062309/56649eda5503460f94be97f5/html5/thumbnails/48.jpg)
Thanks for your attention
XIN CẢM ƠN