realtime operation of reservoir system in flooding season on vu gia thu bon rivers

INTRODUCTION
1. The necessity of the research
On river system Vu Gia - Thu Bon they have been building a lots of
hydro-reservoirs, and this will affect the flooding control of these
reservoirs. The process of reservoir contain the fixed activities, lack
of method warning and forecasting flood actions. Besides, the
realtime operation of reservoirs is applied less, especially in Centre of
Vietnam. So, the research on realtime operation which has the
warning and forecasting model is neccessary and meanful in science
and practice. This not only for the reservoirs in Vu Gia- Thu Bon but
also for others in the Centre. Therefore, I suggest the PhD thesis
"Realtime operation of reservoir system in flooding season on Vu
Gia Thu Bon rivers"
2. Purpose of the research
Dissertation research model building operating systems in real-time
reservoir flood season and the period of application for reservoir
system on the Vu Gia - Thu Bon to improve efficiency and reduce
flood impacts do not cause positive for downstream areas, while still
ensuring generating purpose.
3. Tasks of the research
(1) Analysis, problem setup reservoir system operation in real time.
(2) The study built a model of warning, flood forecasting system of
reservoirs on the Vu Gia-Thu Bon system operator serving.
(3) Dissertation research model building operating systems in real-
time reservoir flood season and the period of application for reservoir
system on the Vu Gia - Thu Bon to improve efficiency and reduce
flood impacts do not cause positive for downstream areas, while still
ensuring generating purpose.
(4) Evaluate usability in actual operation of reservoirs on the Vu Gia-
Thu Bon river and applicability to other reservoir systems of the

central region.

4. Research methods
(1) Methods of analysis, synthesis.
(2) Method of forming causal analysis.
(3) Methods of system analysis.
(4) Methods inherited.
5. Theoretical and practical significance of the research
Theoretical significance: Thesis will contribute to the development of
the field of operation of irrigation systems in Vietnam, as well as
contribute to a solution for the development of the field of water
resources development in the world
Practical significance: thesis oriented technical solutions. The
specific objective of this project is to create a program capable of
calculating support decision-making in the operation and flood
control reservoir system. As the scientific basis for the addition of
operating procedures and also had a form of case studies can be
considered applicable to other river basins of the central region.
Simulation model that authors can build application for flood
forecasting and safe operation of flood control reservoirs on the Vu
Gia-Thu Bon.
6. Scientific Approach
(1) On the basis of theoretical models, build a simulation model from
the rain and flood forecasting system operator for the upstream
reservoirs. The model is connected to the downstream region is
simulated by MIKE 11 models available. The model calculates the
flood is linked simulations in real-time systems.
(2) On the basis of the model is established considering operation
scenarios reservoir system to overcome the limitations of operating
procedures issued reservoir due to limited flood forecasting.

(3) Develop a process to operate in real time in order to improve the
efficiency of flood relief, flood discharge safely secure and store
water for generating purpose and downstream water supply.

7. New findings of the research
(1) Establish a program to calculate the simulation model
(MOPHONG - LU) integrated three models : model rain flow,
reservoir operation model and computing lu river to the uplands in
Vu Gia - Thu Bon serve for flood forecasting with time scheduled
from 3 to 5 days as the basis for determining the reservoir operating
mode in real time.
(2) For the first time the method of construction of reservoir
operation in real time to the reservoir system on the Vu Gia - Thu
Bon flood period fully capable in practical applications.
(3) On the basis of studying the operational plan for flood control
reservoir system , has proposed raising the capacity of flood control
and flood prevention capacity operating modes appropriate to
improve efficiency for flood relief downstream , is the basis for
additional reservoir processes approved.

CHAPTER 1: OVERVIEW OF RESEARCH ON REALTIME
OPERATING SYSTEM RESERVOIR

1.1. Overview of domestic Research

Reservoir operation system is one of the issues that many research
institutions interested in research on practical applications of the
reservoir system in our country.
1.2. Overview of international Research

The problem of operating the system in real time is a very complex
problem, because the reservoir system has its own characteristics, so
no program can completely solve this problem.
1.3. Proposed research
1. Building forecasting models / flood warning from the rain, which
caused flooding rain is predicted by the model predicted rain.
2. The model calculates the flood is linked simulations in real-time
systems.
3. The software to calculate the flood in river systems.
4. Application of simulation models for system operation problem of
reservoir flood season scenarios reservoir system operation''
reasonable'' to satisfactorily resolve the conflict between generating
purpose and lowering flood level.

CHAPTER 2. SCIENTIFIC AND PRACTICAL BASE OF
ESTABLISHING THE REALTIME RESERVOIR
OPERATION PROBLEM DURING THE FLOOD
SEASON FOR RESERVOIR SYSTEM ON VU GIA-THU
BON RIVERS

2.1. Flood Characteristics formation on Vu Gia-Thu Bon
2.1.1. Geographical location: Basin located Coordinates 16o03'-
14o55' north latitude; 107o15 '- 108o24' East longitude.
2.1.2. Topographic features: In general topography of the basin
varies so complex and fragmented. Topography people tend to tilt
from West to East
2.1.3. Features rivers
Vu Gia - Thu Bon river's length and slope of the river to prevent
large.
2.1.4. Formation characteristics of flood in the river system

2.1.4.1. Characteristics rain causes flooding
Heavy rainfall combined with steep terrain is the main cause of
floods in Quang Nam.
2.1.2.2. Characteristics flood mode
Quang Nam has the most terrain is hilly to steep country the ability to
focus quickly.
2.2. Reservoir system and the task of regulating reservoir system
2.2.1. Flood control reservoir system on the Vu Gia - Thu Bon river
Mainstream Vu Gia - Thu
Bon and will have built large
reservoirs . 5 reservoirs is
responsible for downstream
flood relief : A Vuong , Song
Tranh 2 and Song Bung 2
and Song Bung 4 and Dakmi
4.




2.2.2. Tasks and processes regulating reservoir operation flood
period
Designing tasks of 5 reservoirs are defined as follows:
- Water supply for downstream dry season period with a total volume
of about 273.9 million m3 moderator .
- Power generation capacity has been designed in accordance with
the hydro plants are listed in the table above .
- Cut flooding downstream with the flood of applications with
frequencies ranging from 5 % to 10 % , equivalent to major floods
occur in 2007 and 2009.

Table 2.9. Welcome flood water level and flood prevention capacity of the
reservoir is responsible for downstream flood level
No
Reservoir
MND

(m)
MNC
(m)

W
tb

10
6
m
3
W
hi

10
6
m
3

Z
đl

W
fl

10
6
m
3
N
lm

Mw

1

Song Bung 2

605 565

94,3

73,9 600(*)

13,45

100

2

Song Bung 4

222,5

205

510,8

234,0

218(*)

68 156

3

A Vương 380 340

344 266,5

376 43,92

210

4

Dak Mi 4 258 240

310,3

158 255 49,94

148

5

Song Tranh 2

175 140

733,4

521,17

172 81,85

190

Total 1993

1253.6

257.2

804

Note: (*): imcome flood water level suggested by author.
2.3. Methodological basis for reservoir operation in real time
2.3.1. The concept of reservoir operation in real time
Reservoir operating in real time is a method which determines the
operation at a certain time depending on the state of the system at that
time and forecasted information in the next paragraph . Decision
operator = F ( + System Status forecast results)
2.3.2. The main contents of operating system problems in real-time

reservoir

Perform an operational processes in real time to any reservoir system
include:













( 1 ) data collection system ;
( 2 ) banking data storage and data management systems ;
( 3 ) analysis of program results ;
( 4 ) the program flow forecasts in real time ;
( 5 ) simulation program activities reservoir system.
2.3.3. Description and operating principle reservoir flood control
systems in real time
Calculate the forecast rain and flood forecasting and reservoir buttons
to enter the river catchment .
* Simulation model with inputs including
* Decision operating system according to the calculation results of
the simulation model .
Operation flood control reservoir system with rain forecast for 3-5

days , the time period between the forecast and update operational
decisions is operational decision Δt at any time is to follow the steps
follows :
Figure 2.2 Schematic diagram between the components
of
system operation problem


- Step 1 : At any time during the operational phase , carried out on
the basin precipitation forecasts .
- Step 2 : Calculate the flow forecasting process water to enter the
save button and the corresponding rain forecast .
- Step 3 : Analyze system status .
- Step 4 : Calculate movements determine the reservoir water level
and water flow of the flood-control button on the system .
Step 5 : Decide a reasonable plan to operate the system.
Decision will be adjusted to operate continuously at the next moment
during system operation.
2.3.4. Scientific basis and practical problem setup real-time
operation for flood control reservoir system on the Vu Gia - Thu Bon
river
Problem operated reservoir flood control systems based on the
following grounds :
(1) The requirements and the need to establish operational problem of
reservoir flood control systems in real time .
(2) The ability to forecast rain caused flooding and flood forecasting
and reservoir buttons to enter saved the whole system .
(3) The ability to choose the available models or new models
developed in accordance with operational problems posed.
2.4. Set math operation and regulation of real time flood period

reservoir system on the Vu Gia - Thu Bon
2.4.1. Determine the purpose of research
1. Application method operates in real time period for the reservoir
flood season name Vu Gia - Thu Bon .
2. Developed a simulation model to serve flood forecasting and
reservoir operation flood control reservoir system in real time ,
testing for Vu Gia - Thu Bon during the flood season .
3 . Propose to operate reasonable flood control reservoir system
2.4.2 . Scope of the Study
2.4.2. Scope of the Study

2.4.2.1. Space research
Includes 5 reservoirs downstream flood control mission , which is the
A Vuong reservoir , Dakmi 4 , Song Tranh 2 , Song Bung 2 and Song
Bung 4.
2.4.2.2. The limitation
Thesis only solve part of the problem reservoir system operation in
real time , including :
- Development of simulation models for flood forecasting served
from rain and reservoir operation .
- Application has been made to model the problem of operating the
system as a result of hydrological forecasts .
- On the basis of research operating system script flood control
reservoirs , operation and propose appropriate flood forecasting
method defined in the thesis.
2.4.3. Approaching method
1 . Construction of flood forecasting models estimated time of 3-5
days and is continuously updated in the forecast period as a result of
rain forecast .
2 . For the upstream sector , construction program "MOPHONG –

LU" 3 model by integrating components : flood forecasting model
and enter the reservoir flow model and calculate the flood in river
simulation models operation of the reservoir . For downstream use
MIKE 11 model .
3 . Flood scenarios.
2.4.4. Research Contents
1. Development of simulation model system upstream region serves
operate flood forecasting and reservoir system in real time ;
2. Application of simulation model to calculate the operation
scenarios reservoir system . From recommendations on processes that
operate in real-time flood period for the reservoir system on the Vu
Gia - Thu Bon.

CHAPTER 3: ESTABLISHING A MODEL FOR
SIMULATION AND FLOOD FORECAST RESERVOIR
SYSTEM REALTIME OPERATING UNDER REAL-
TIME SYSTEM FOR RESERVOIR IN VU GIA-THUBON
3.1. Overview of the model application in reservoir management
and operational orientation in dissertation research
3.1.1. Introduction of the management model of reservoir operation
The RIBASIM model , MIKE - BASIN been widely applied in
preparing the planning and management of water resources for a river
basin but no application in reservoir operation system.
MIKE 11 model type model suitable for operational flood forecasting
and flood control reservoir system . However, the model applies to
applications for operational problems reservoir flood control systems
still need to write the command to operate the floodgates and also
very complex.
3.1.2. Summary of simulation modeling applications in reservoir
operation system in real time

Currently there are two models tend to simulate applications in
reservoir operation system :
1 . Tend to use models available
2 . Development of models to suit the problem reservoir system
operation over time .
3 . Comment: It is difficult to model applications are available to
operate the math reservoir flood control systems in real time . Today
's commercial development trends 2
3.1.3. Orientation of the thesis research
Based on these observations , the authors study the construction of a
generalized simulation model ( MOPHONG - LU ) problem serving
operate flood control reservoir system . The model will be applied on
the Vu Gia - Thu Bon river and assess applicability to other
watersheds have similar conditions.

3.2. Building simulation models calculate the flood on the river
system management MOPHONG_LU use in reservoir flood
control operation
3.2.1. The model structure
Similar to the model , the model that the authors MOPHONG - LU
also build structures of block simulation .
( 1 ) module of basin settings :
( 3 ) module of the simulation :
( 2 ) network module of the lake:
3.2.2. Selection of model components in the model MOPHONG - LU
3.2.2.1. Selection methods calculate the flood flow to the lake and
enter the save button
In this study we chose two calculation methods : Method street SCS
synthetic unit and calculation method according to the NAM model.
3.2.2.2. Selection methods calculate the flooding river network

Computing flow for each river segment is modeled Muskingum
method
3.2.2.3. Computing flow through the reservoir
Flow through the outlet discharge is calculated by the water balance
equation solver à discharge capacity through the discharge process
3.2.2.4. Integrated simulation model
The integration is the model in a simulation model : the enter button
to store this description will enter button connected to any river
system ; each river are described sequence with the paragraph above
and below paragraphs how ( a river can be connected with many river
above it , also similar to the reservoir node.
3.2.3. Programming model calculations for MOPHONG - LU
The program built computational algorithm based on the link
between the component model and the river was named MOPHONG
- LU.




3.2.3.1. Algorithms and computer programs for modeling
Calculation program written in FORTRAN 77 includes main
program and five subroutines.
a. Enter the program calculates flow along the SCS unit
b . The program calculates flow entering the model NAM
c . Computer program through the reservoir flood
Here is the program interface on the screen when setting the initial
operating plan:
WRITE(*,971)SC(J,N1-1)
971 FORMAT(20X,'SO CUA XA THOI DOAN
TRUOC=',1X,F3.1)

write(*,940)
940 FORMAT(20X,//,' DOC LUU LUONG DU BAO
DEN HO 12h TIEP THEO')
write(*,94)
94 FORMAT(20X,//,' DOC SO CUA DONG MO ')
write(*,101)SCX(J)
101 FORMAT(20X,//,' TONG SO CUA
XA:',1X,F3.0)
write(*,'(A\)')' SO CUA XA DUOC MO HET=
'
READ(*,*)SCUA
write(*,'(A\)')' SO CUA XA MO VOI DO
MOA:'
READ(*,*)SX1
write(*,'(A\)')' DO MO (PHAN TRAM %):'
WRITE(*,'(A\)')' SO THOI DOAN TINH TOAN
= '
READ(*,*)NDT
3.2.3.2. Integration of component models and calculation program
Simulation models integrate components in MOPHONG - LU model
is simulated in computational linkages between the river , the enter
button and the button to save the reservoir.
3.2.3.3. Calibrate and test the model : Calibration model
implemented by the method of trial and error to determine the
parameters of the model.



3.2.4. Application MOPHONG - LU model for Vu Gia - Thu Bon
MOPHONG - LU model is applied to the upstream Vu Gia - Thu

Bon . Application content includes 2 models : ( 1 ) Determine the
model parameters and ( 2 ) application in reservoir operation in real
time.
3.2.4.1. System Characteristics Vu Gia - Thu Bon river
Vu Gia - Thu Bon
and Vu Gia River
include 2 Bon.Khu
income from sources
upstream of the
Association of Hotels
, the Nong Son , in
general there is no
overflow on .
Downstream from
Nong Son and the
hotel to the river
mouth , while large
floods floodwaters
flowed over a wide
area of the
downstream river basins.
3.2.4.2. Characteristics of the target network , hydrological
On the Vu Gia - Thu Bon 18 rain gauges , flow measuring stations 2
and 6 water stations.
3.2.4.3. Flood control reservoir system
System Vu Gia - Thu Bon has 5 large reservoirs to regulate flood
control on the Vu Gia four reservoirs in which there are two types of
serial clock is the Song Bung 2 and Song Bung 4 , two lakes and
Figure 3.11. Map grid meteorological stations
and

hydrological as planned (Source: Water Resources

Management Department

-

Ministry of Natural

parallel to the A Vuong DakMi 4a , Song Tranh 2 reservoir on the
Thu Bon basin.


3.2.4.4.
Establish
regional river
network
upstream Vu
Gia - Thu Bon
Khu The study
area was
simulated
import saved
18 , 15 and 5
buttons river
reservoirs .
There are three
control buttons
at the hydrological station location Nong Son, Thành Mỹ & Hội
Khách

3.2.4.5.Calibration , and validate models
Calibration , and testing models
Choose to simulate floods of 2009 and 2007 for validation.
Results calibrate and test the model
a. In case of imported sugar saved per unit of SCS model : In this
case, the parameters of sugar units were identified characteristics
river morphology . So , just to define the parameters K and X 's 15
river segments , totaling 30 parameters .
b . Admissions are stored NAM model : In this case , the model
parameters increased significantly . Each component in the basin
enter button to save 9 NAM model parameters , with 18 and 15 enter
the river flow , the total number of model parameters would be 198 .
Figure 3.12: System diagram of Vu Gia
-
Thu Bon
river upstream area


Calculation of traffic flow at the entry node determined by two
methods performed on the two floods from 25-9 in 2009 to 6-10
(simulation) and floods 8-11 days to November 14, 2007 (Test)
according to the document 's 12 -hour rain rain gauges in the basin ,
then calculate the Member of the American stations , Nong Son and
Hotel Association .
Results NAM model simulates relatively more close to reality .
However , the model line units can apply computational flow from
rain to flood downstream basins where NAM model without applied
conditions.
Assessing the quality of simulation model verification and model
NAM sugar units by a factor of SCS Nash results in Table 3.7.

Table 3.7: Nash coefficient simulation results and test models
Nong Son Thanh My
A Vuo
ng
Nash coefficient
Model
Verify
Model

Verify

Model

Figure 3.13: Results from 25-9
floods Adjust -> 6/10/2009 at
the
gauging stations

Nong Son

Figure 3:16: floods inspection
results from 8/11 to 11/11/2007 in

hydrological

stations

Nong
Son

Figure 3.14: Results from 25-9
floods Adjust -> 6/10/2009 in
Thanh

My

stations

Figure 3:17: floods inspection
results from 8/11 to 11/11/2007
in
Thanh

My

stations


NAM model
0,98

0,99

0,99

0,79

0,97
SCS model
0,89

0,77

0,95 0,89
The result shows that the method often sugar units for flood peak
forms than NAM model. However, the total amount of flood
calculations in two models do not differ much.
3.3. Flood simulation model MIKE 11 for downstream Vu Gia -
Thu Bon river
3.3.1. MIKE 11 model introduction
3.3.2. Seting up the hydraulic modeling diagram river system.
Hydraulic diagram for systems Vu Gia - Thu Bon complex. The river
system has many branches connecting to each other , when large
floods overflow of water flowing through the river delta downstream
were overflowed , not only flood flows in the river that flowed
through the cell also create fields flood drainage directions .
Downstream river network Vu Gia - Thu Bon simulated hydraulic
diagram include: 11 and 137 cross the river:
Upstream boundaries: is the process of actually measuring air flow in
the front door of the lives of the calculation period :
+ Hydrological stations on the Vu Gia Hoi Hotels
+ Nong Son hydrological stations on Thu Bon River
Downstream boundaries: the process is positive tide now measured in
the doors of life in the calculation period :
+ Vu Gia River : in Han passage
+ Thu Bon River : Dai passage
+ Yangtze River : Lo passage
Additional boundaries:
+ The River Côn Flv = 627 km2, click the Vu Gia river locations in
19780 m

+ Bau La river Flv = 67 km2 , click the Vu Gia river locations in 49
120 m
+ Tuy Loan River Flv= 309 km2 , click the Vu Gia River in 59 420
m

+ Vinh Trinh river Flv = 47 km2 , click Ba Ren River in 6900 m
+ Tra Kien river Flv = 123 km2 , click Ba Ren River at 15615 m
+ Ly Ly River Flv = 279 km2 , click Ba Ren River in 23 145 m
+ Trung Phuoc River Flv = 231 km2 , click the Thu Bon River in
4860m
+ Da Mai Flv = 50 km2 , enter on the Thu Bon River ( 17840 m )
Process flow volume of rain on hick life from calculations . Partition
-based system criteria in map 1/10000 . Area in each region
according to the agriculturalist foolproof .
To determine the parameters for the model , calibrated selection
floods : 27/9 to 3/10/2009 . The flood testing : 8/11 to 17/11/2007
Input data model : Range of flow entering and variables from data
transmitted from the model LU MOPHONG
Downstream boundary : Process tide heights measured stores in Han
, Lở & Dai passages during the calculation
Bảng 3.11. Rating errors
Calibration flood: 8/11/2007 -

14/11/2007
Verification flood
: 25/11/2009
– 2/11/2009
Location

H

tđ
H
MP
H
tđ
H
kđ
Error
Hoi Khach
17.67

17.630

0,040 18.53

18.57

0,04
Ai Nghia

10.33

10.526

0,196 10.77

10.72

0,05

Cam Le 3.98

3.782
0,198

3.16 3.34

0,18

Giao
Thuy
9.60

9.936
0,336

9.75 9.94

0,19

Cau Lau

5.39

5.605
0,215

5.29 5.49

0,20

Hoi An 3.28

3.350
0,070

3.20 3.17

0,03

Comment results
Through evaluation results and error process of drawing lines and
calculate water levels measured at stations, noticed the difference in
flood peaks in most stations is negligible. Ministry hydraulic
roughness parameters as above can be used in other simulations
floods.

CHAPTER 4: PROPOSED PLAN AND FLOOD
PREVENTION CAPACITY MODE DOWNSTREAM
FLOOD RELIEF VU GIA-THU BON TOWARDS
REALTIME OPERATING SYSTEM RESERVOIR IN
REAL TIME
4.1 Set system options scenarios flood prevention capacity and
regulatory regime for flood relief reservoir system on the Vu Gia-
Thu Bon river
4.1.1. Basis set the script on flood prevention capacity and cut
operating modes downstream flood
4.1.2. Construction scripting system reservoir flood towards
"creating flood water levels imcome"
Phương án 1 (PA1-1): Vận hành theo quy trình liên hồ chứa

Option 1 (PA1-1) Operate in accordance with the reservoir
Option 2 (PA1-2): Please imcome the flood water level lower
reservoir processes.
Option 3 (PA1-3): Discharge flood before the flood of 48h-60h.
Option 4 (PA1-4): The plan initially lower water levels imcome flood
4.1.2. Build scripts for system plans towards flood prevention
capacity "created before the flood water level fixed"
4.2. Calculate operating under the scheme
4.2.1Results calculated by the imcome flood water plan: The
calculation scheme was carried out with floods in September 2009
Table 4.2: Effective flood control buttons at Nong Son, Thanh My, Bung
S Tranh 2

Đak Mi 4

A Vương

S Bung 2

S Bung 4

Scenario


Capacity for flood
prevention plan

Vpl

ZTL

Vpl

ZTL

Vpl

ZTL

Vpl

ZTL

Vpl

ZTL

PA2-1
Capacity of
incoming flood flow

81.9

171.0

49.9

253.0

43.9

375.0

13.5

600.0

68.0

218.0

PA2-2 Vpl = 30%Vhd
156.4

167.1

49.9

253

79.9

370.0

21.57

596.6

68.0

218.

PA2-3 Vpl = 40%Vhd
208.5

164.1

63.30

251.6

106.6

366.7

28.76

593.4

93.59

216.2

PA2-4 Vpl = 50%Vhd
260.2

161.

79.13

249.9

136.5

363.

33.9

591

117.6

214.6

PA2-5
Overflow level

260.2

161.0

139.4

242.5

136.5

363.0

33.9

591.0

182.9

210.5


River + A Vuong
Plan
Point no.
The total reduction volume
at flood peak (10
6
m
3
)
% of the
whole
Nông Sơn 68,27 4,00
Thanh My 39,16 3,90
NL S.Bung+ A Vuong

125,8 12,9
PA 1-1

Hoi Khach 162,8 6,70
Nong Son 106,0 6,0
Thanh My 69,65 7,0
NL S.Bung+ A Vuong

140,0 14,0
PA1-2

Hoi Khach 200,8 8,0
Nong Son 193,4 11,0
Thanh My 97,0 10,0
NL S.Bung+ A Vuong

207,6 21,0
PA1-3

Hoi Khach 300,3 12,0
Nong Son 215,1 13,0
Thanh My 72,3 7,1
NL S.Bung+ A Vuong

308,0 31,6
PA1-4

Hoi Khach 390,0 16,1
Table 4.3: Maximum water level at the downstream location according to
the operational plan flood level downstream. September 2009 floods.
The operational schemes of hydro-
reservoir for setting up
the incoming-flood water level
Point
Without flow
reduction
PA1-1 PA1-2 PA1-3 PA1-4

Hội Khách 19,08 17,96 18,87 17,45 17,69
Ái Nghĩa 10,90 10,27 10,24 9,97 10,09
Giao Thủy 9,74 8,83 8,81 8,61 8,57
Câu Lâu 5,38 4,72 4,68 4,49 4,39
Cẩm Lệ 3,55 3,18 3,14 2,96 2,66
Hội An 3,20 2,75 2,73 2,61 2,51
Table 4.4: Effect reduced water levels downstream towards creating
capacity to imcome flood before the flood - The flood in September 2009.
Operational plan of setting the incoming flood water level

Point
Without flow reduction

PA1-1 PA1-2 PA1-3 PA1-4
Hoi khach

0 1,12

1,21

1,63

1,39


Ai nghia 0 0,63

0,66

0,94

0,82

Giao Thuy

0 0,47

0,49

0,91

1,17

Cau Lau 0 0,66

0,70

0,89

0,99

Cam Le 0 0,37

0,41

0,59

0,89

Hoi An 0 0,45

0,47

0,60

0,70

4.2.2. Results calculated according to the flood control plan for the
fixed capacity
Table 4.5: Effective flood control buttons at Nong Son, Thanh My , Bung
River + A Vuong
Plan Point no.
The total
reduction volume
at flood peak (10
6
m
3
)
% of the
whole
Nong Son 68,27 4,00
Thanh My 39,16 3,90
NL S.Bung+ A Vuo
ng
125,8 12,9
PA 2-1
Hoi Khach 162,8 6,70
Nong Son 179,7 10,5
Thanh My 55,7 5,5

NL S.Bung+ A Vuo
ng
171,0 17,5
PA2-2
Hoi Khach 224,8 9,3
Nong Son 229,0 13,4
Thanh My 74,0 7,3
NL S.Bung+ A Vuo
ng
219,0 22,5
PA2-3
Hoi Khach 292,0 12,0
Nong Son 265,0 15,5
Thanh My 74,0 7,3
NL S.Bung+ A Vuo
ng
273,0 28,0
PA2-4
Hoi Khach 347,6 14,3
Nông Sơn 250,0 14,7
Thành Mỹ 122,3 12,1
NL S.Bung+ A Vương
303,1 31,1
PA2-5
Hội Khách 426,1 17,6
Table 4.6: Maximum water level at the downstream location according to
the operational plan flood level downstream. September 2009 floods.
The operational schemes of hydro-reservoir for setting up the
incoming-flood water level
Point

Without flow
PA2-1

PA2-2

PA2-3 PA2-4

PA2-5


reduction
Hoi Khach 19,08 18,20 18,03

17,61 17,36 17,10

Ai Nghia 10,90 10,42 10,30

10,06 9,92 9,79
Giao Thuy 9,74 9,25 8,99

8,80 8,73 8,67
Cau Lau 5,38 5,02 4,84

4,63 4,56 4,52
Cam Le 3,55 3,19 2,98

2,81 2,70 2,59
Hoi An 3,20 2,95 2,84

2,70 2,66 2,62

Table 4.7: Effect reduced water levels downstream towards creating
capacity to imcome flood before the flood - The flood in September 2009.
Operational plan of setting the incoming flood water level
Point
Without flow
reduction
PA2-1

PA2-2

PA2-3

PA2-4

PA2-5

Hoi Khach 0 0,88 1,05 1,47 1,72 1,98
Ai Nghia 0 0,49 0,61 0,84 0,99 1,12
Giao Thuy 0 0,49 0,75 0,94 1,00 1,06
Cau Lau 0 0,36 0,54 0,75 0,81 0,86
Cam Le 0 0,36 0,56 0,74 0,85 0,99
Hoi An 0 0,25 0,36 0,50 0,54 0,58
4.3. Conclusion
From the results showed that Vietnam offers a better solution by
raising the effective medium flood downstream tasks while ensuring
power generation and water filled pool area at the end of the flood
season.
4.4. Proposed additional operating procedures reservoir
1 . During the flood season , when there is no flood , the water
reservoir is integrated to the larger high flood water level was

welcomed in processes related regulations issued reservoir .
2. As forecast in the next 48 hours to appear flood flow to the
reservoir exceeds the prescribed level in reservoir processes , if the
water level is higher than welcome flood water level , discharge to
the reservoir to bring the water level lake of flood water levels
welcome 24 hours before the flood occurred .
3. If the forecast in the next 24 hours , floods appear to flow in excess
of prescribed operating procedures , discharge continues to take the
high water level is lower than the prescribed levels welcome flood
until the water level at the downstream stations reached an alarming

level II . When the downstream water level reached the second alarm
, flood discharge flow shall not exceed the flow to the lake. Welcome
flood capacity is used for downstream flood forecasting in about 12
hours when the flood peaked reservoirs.
4.5. Test results in real-time operation
4.5.1. Selection trials floods: Experiment with major floods occurred
in September 2009 according to the document rain forecast for 3
days, starting on day 23-9 to 29-9 in 2009
4.5.2. Mode operation of reservoirs and operating results calculated
in real time: Mode operation be performed according to the process
is that the author has suggested on here , time to begin operating from
26/09/2013. According rain forecast data is updated continuously
from 26/ 9 to 29/9 . According to the forecast traffic to the lake , the
decision to operate was adjusted to 7 pm daily operational decisions
of the floodgates.
4.5.3. Comment
With the ability to predict flood updated 3 days to allow continuous
mode is expected to be discharged before the flood .
Having foreseen the flooding process should actively make plans for

flood peak right cut and adjusted continuously discharged during
floods. Should not only increase efficiency for downstream flood
control but also ensure the safety of reservoirs to meet the great
flood.
Test results show the applicability of the model constructed by the
author and may consider editing to apply in practice .
Although the results are limited rainfall forecasts , the forecasts are
not guarantees high , but with the application of the model
MOPHONG_LU can still be active in the operation , ensure public
safety and improve the efficiency of the cutting reduce flooding
downstream./.
4.6 Assessing the impact of operating mode generating purpose
efficiency
From the results showed that Vietnam offers a better solution by
raising the effective medium flood downstream while ensuring
generating purpose and water filled pool area at the end of the flood
season.

CONCLUSIONS AND RECOMMENDATIONS
CONCLUDIONS
1 . Research on reservoir operation flood control systems in real time
is a problem complicated and diversified research has not been
widely adopted . For reservoir system on the Vu Gia - Thu Bon River
, although there have reservoir processes , but due to the flood
forecasting methods and models limited operating system reservoirs
downstream flood control limited . This effectively reduces
downstream flood relief and can not operate safely in flood control
works . Thesis approach towards real-time operating solve a pressing
problem meaningful and practical science . The first time was able to
build simulation models forecast operation combined with real-time

flood season and successfully tested the ability to apply for reservoir
system on the Vu Gia Thu Bon River
2 . The thesis complete overview of the research related to the field
of reservoir system operating in real time . From these principles of
operation of the system in real time , on the basis of analyzing the
characteristics of flood Vu Gia - Thu Bon river , the author has
established a math operation flood control reservoir system , define
solution -oriented research approach problems operating the system
in real time .
3 . Provincial Programme " MOPHONG - LU " constructed by the
authors on the basis of integrated rain - flow modeling , reservoir
operation model and calculate the flood in river allows prolonged
flood forecasting to watch button reservoirs and river nodes .
Equivalent model with the rain flow Mike , HMS and distribution of
reservoir operation in Hz - Ressim . The model can be applied in
operational flood control reservoir system in real time with the
support of MIKE 11 model to simulate flood downstream areas .
4.The thesis research solutions improve efficiency for downstream
flood relief in two ways : ( 1 ) Increase the capacity of the reservoir

flood pickup relative to the reservoir operation based on extended
projects flood alert button to lakes and rivers to 3 to 5 days, (2)
Increase the capacity of flood control in the direction determined
"before the flood water level fixed". From the computational studies
show that solutions to increase flood capacity to welcome more
advantages by being efficient while improving flood control
downstream , just to avoid the risk of water filled pool area and
ensure the end of the flood season generator requirements of the
reservoir.
5 . Simulation model that authors build uplands Vu Gia - Thu Bon

River is set under general direction . Therefore, if you are going to be
able to complete applications for other basins in Vietnam . However,
to add the interface to facilitate the user .
6 . Results application simulation models for operating the reservoir
system on the Vu Gia - Thu Bon river there are certain limitations
due to insufficient rainfall records , documents riverbed topography ,
especially downstream river not ensure high levels of reliability.
RECOMMENDATIONS
7. Direction of thesis research approach to the problem is to operate
in real time and is limited to "build simulation models serve to
operate in real time." To operate the reservoir system on the Vu Gia-
Thu Bon river in the true sense, the need for further research./.

MINISTRY
OF EDUCATION AND TRAINING

DANANG UNIVERSITY
ooo



TO THUY NGA



THE REALTIME OPERATING REGULATORY
MODEL IN FLOOD SEASON FOR RESERVOIR
SYSTEM ON VU GIA- THU BON RIVERS

Specialization : Water Resources Development
Code : 62.44.92.01





PH.D THESIS IN BRIEF









DA NANG - 2014