scholarly journals Evaluation of the Conflict Between Hydropower Generation and Flood Control in the Cahora Bassa Dam, Mozambique

2016 ◽  
Vol 5 (3) ◽  
pp. 96-104
Author(s):  
F E Banze ◽  
R Ploszai ◽  
H D O A Fill
Keyword(s):  
Flood Control ◽  
Hydropower Generation

Deriving reservoir operating rules considering ecological demands of multiple stations

2021 ◽  
pp. 1-59
Author(s):  
Chen Wu ◽  
Yibo Wang ◽  
Jing Ji ◽  
Pan Liu ◽  
Liping Li ◽  
...  
Keyword(s):  
Reservoir Operation ◽  
Flood Control ◽  
Optimization Models ◽  
Ecological Indicator ◽  
Generation Model ◽  
Hydropower Generation ◽  
Rule Curves ◽  
Constraints Model ◽  
Operating Rule ◽  
Operating Rule Curves

Reservoirs play important roles in hydropower generation, flood control, water supply, and navigation. However, the regulation of reservoirs is challenged due to their adverse influences on river ecosystems. This study uses ecoflow as an ecological indicator for reservoir operation to indicate the extent of natural flow alteration. Three reservoir optimization models are established to derive ecological operating rule curves. Model 1 only considers the maximization of average annual hydropower generation and the assurance rate of hydropower generation. Model 2 incorporates ecological objectives and constraints. Model 3 not only considers the hydropower objectives but also simulates the runoff and calculates the ecological indicator values of multiple downstream stations. The three models are optimized by a simulation-optimization framework. The reservoir ecological operating rule curves are derived for the case study of China's Three Gorges Reservoir. The results represent feasible schemes for reservoir operation by considering both hydropower and ecological demands. The average annual power generation and assurance rate of a preferred optimized scheme for Model 3 are increased by 1.06% and 2.50%, respectively. Furthermore, ecological benefits of the three hydrologic stations are also improved. In summary, the ecological indicator ecoflow and optimization models could be helpful for reservoir ecological operations.

scholarly journals Real-time optimisation of the Hoa Binh reservoir, Vietnam

2011 ◽  
Vol 42 (2-3) ◽  
pp. 217-228 ◽  
Author(s):  
Bertrand Richaud ◽  
Henrik Madsen ◽  
Dan Rosbjerg ◽  
Claus B. Pedersen ◽  
Long L. Ngo
Keyword(s):  
Real Time ◽  
Flood Control ◽  
Hydropower Generation ◽  
Operating Rules ◽  
Forecast Lead Time ◽  
Conflicting Objectives ◽  
Simulation Optimisation ◽  
On Line ◽  
Hoa Binh

Multi-purpose reservoirs often have to be managed according to conflicting objectives, which requires efficient tools for trading-off the objectives. This paper proposes a multi-objective simulation-optimisation approach that couples off-line rule curve optimisation with on-line real-time optimisation. First, the simulation-optimisation framework is applied for optimising reservoir operating rules. Secondly, real-time and forecast information is used for on-line optimisation that focuses on short-term goals, such as flood control or hydropower generation, without compromising the deviation of the long-term objectives from the optimised rule curves. The method is illustrated for optimisation of the Hoa Binh reservoir in Vietnam. The approach is proven efficient to trade-off conflicting objectives. Selected by a Pareto optimisation method, the preferred optimum is able to mitigate the floods in the downstream part of the Red River, and at the same time to increase hydropower generation and to save water for the dry season. The real-time optimisation procedure further improves the efficiency of the reservoir operation and enhances the flexibility for the decision-making. Finally, the quality of the forecast is addressed. The results illustrate the importance of a sufficient forecast lead time to start pre-releasing water in flood situations.

Optimal coordination strategies for flood control and hydropower generation of reservoir

2020 ◽  
Author(s):  
Lin Zhang ◽  
Wei Ding ◽  
Guoli Wang
Keyword(s):  
Water Level ◽  
Flood Control ◽  
Flood Damage ◽  
Hydropower Generation ◽  
Two Stage ◽  
Forecast Uncertainty ◽  
Streamflow Forecast ◽  
Trade Offs ◽  
Water Head ◽  
Optimal Coordination

<p>During flood seasons, the water head of the reservoir is kept in flood limited water level (FLWL) to satisfy the flood control objective, but this runs counter to the need for hydropower generation to maintain a high water-head. This paper focuses on the optimal hedging rules by setting an appropriate FLWL to maximize the benefit of hydropower without increasing the flood damage and raise the water level at the end of flood for non-flood season/future use. Two-stage hydropower functions considering the constraint conditions which include the downstream environmental flow and installed capacity are built. On the basis of studying the marginal utilities of the two-stage hydropower functions, the competitive and collaborative relationships between flood damage and hydropower benefit were analyzed qualitatively. A two-stage reservoir operation model with two objectives that are minimum flood damage and maximum hydropower generation is developed, which considers streamflow forecast uncertainty and acceptable flood risk. The derived OHR from the model can be used to make trade-offs between flood damage and hydropower benefit under different levels of streamflow forecast uncertainty or acceptable risk. Finally, the analysis is applied to the Nierji Reservoir in the north of China. The results indicate that the OHR can increase hydropower generation 1.57x106kw·h and decrease the volume of abandoned water30.04x106m3 average annual.</p>

scholarly journals Mosul Dam, NW Iraq: Is a Safe Dam??

2021 ◽  
Vol 5 (2) ◽  
pp. 56-61
Author(s):  
Varoojan Siskian ◽  
Nasrat Adamo ◽  
Nadhir Al-Ansari ◽  
Jan Laue ◽  
Aayda Abdulahad
Keyword(s):  
Flood Control ◽  
Northwestern Part ◽  
Hydropower Generation ◽  
Tigris River ◽  
Current Article ◽  
Grouting Materials ◽  
Earth Fill

Mosul Dam is located in the northwestern part of Iraq impounding the Tigris River; about 60 km north of Mosul city. This project is multipurpose project; to provide water for irrigation, flood control and hydropower generation. The dam is 113 m high and 3650 m long including the spillway. The dam is earth fill type with a mud core. The dam was designed to impound 11.11 km3 because it is based and underlain by gypsum beds alternated with limestone and marl. Therefore, it is planned to use continuous grouting to fill the karst caverns. The used quantity exceeded 95000 tons of solid grouting materials since 1986 up to 2014. After all, is the dam safe? The details are given in the current article.

Storage Ponds Application for Flood Control, Hydropower Generation and Water Supply

2019 ◽  
Vol 10 (4) ◽  
pp. 219 ◽  
Author(s):  
Avin Dadfar ◽  
Mohsen Besharat ◽  
Helena Margarida Ramos
Keyword(s):  
Water Supply ◽  
Flood Control ◽  
Hydropower Generation

scholarly journals Naumore Storage Project Should be the Last Resort of Development on the Main Course of Rapti (West), Nepal

2016 ◽  
Vol 18 ◽  
pp. 1-5
Author(s):  
Hari Man Shrestha
Keyword(s):  
Flood Control ◽  
Flow Regulation ◽  
Essential Elements ◽  
Irrigated Agriculture ◽  
Medium Size ◽  
Hydropower Generation ◽  
Flood Water ◽  
River Waters ◽  
Dry Spell ◽  
Dam Site

Water, food and energy are three essential elements of life and, therefore, they need to be made internally secured in a long lasting manner. In the case of Nepal, river waters are the basic sources of all these elements and are the only resources available indigenously in Nepal for these purposes. Rapti (West), being medium size river of rain-fed nature, the dry spell continues long from December up to the end of May; at the same time the flood waters available particularly in July, August and September create havoc by flooding in the downstream reaches. The Kapilvastu area which can be commanded by the Rapti (West) river does not have other dependable sources for fulfilling its requirements. The only way to fulfill its requirements without affecting downstream users is, thus, to capture a portion of flood water of Rapti behind a storage dam aimed at diversion to Kapilvastu for use during dry season. An appropriate site for such purpose is located at Bhalubang. Hence, this site needs to be developed first to ensure the diversion to Kapilvastu and then a much higher storage dam site at Naumore could, later at appropriate time but within 25 to 30 years after development of Bhalubang site, be developed for increasing the flow regulation potential of the Rapti River so that the hydropower generation, flood control and intensification of irrigated agriculture at its commendable areas, could be maximized. HYDRO Nepal Journal of Water Energy and EnvironmentVolume- 18, 2016, JanuaryPage -1 to 5

A reliability programming model for hydropower optimization

1994 ◽  
Vol 21 (6) ◽  
pp. 1061-1073 ◽  
Author(s):  
Rangarajan Srinivasan ◽  
Slobodan P. Simonovic
Keyword(s):  
Flood Control ◽  
Programming Model ◽  
Original Method ◽  
Economic Losses ◽  
Hydropower Generation ◽  
Reservoir Release ◽  
Hydropower Optimization ◽  
Manitoba Hydro ◽  
Nonlinear Energy ◽  
Reservoir Planning

A new reliability model for planning the operation of a multipurpose reservoir for hydropower generation and flood control, which considers the stochastic nature of inflows, is presented. The proposed solution algorithm maximizes the benefits accrued from hydropower generation and minimizes the economic losses incurred due to the reservoir not meeting the required reliabilities for hydropower supply and flood control. This algorithm uses a linearization technique to approximate the nonlinear energy function. An original method of incorporating the energy generation in the formulation of the reliability programming model is presented. This model determines the optimal reservoir release policy along with the optimal reliabilities of satisfying the hydropower demand and providing the required flood control storage. Applicability of the model is demonstrated using Manitoba Hydro data. Key words: reservoir planning, midterm planning, flood control, hydropower, stochastic modeling, reliability, risk-loss.

scholarly journals Analysis of Operational Changes of Tarbela Reservoir to Improve the Water Supply, Hydropower Generation, and Flood Control Objectives

2020 ◽  
Vol 12 (18) ◽  
pp. 7822
Author(s):  
Ahmed Rafique ◽  
Steven Burian ◽  
Daniyal Hassan ◽  
Rakhshinda Bano
Keyword(s):  
Performance Analysis ◽  
Water Supply ◽  
Water Demand ◽  
Flood Control ◽  
Operations Strategy ◽  
Hydropower Generation ◽  
Reservoir Performance ◽  
Operational Rule ◽  
Integrated Performance ◽  
Water Evaluation And Planning

In this study, a model was created with the Water Evaluation and Planning (WEAP) System and used to explore the benefits of altering the operations of Tarbela Dam in terms of reliability, resilience, and vulnerability (RRV) for the three objectives of irrigation supply, hydropower generation, and flood control. Sensitivity analysis and logical reasoning with operators identified a feasible operational rule curve for testing using the integrated performance analysis. The reservoir performance for the altered operations was compared to the baseline performance following current operations for both historical and projected future climate and water demand conditions. Key simulation results show that the altered operations strategy tested under historical climate and water demand conditions would increase RRV by 17%, 67%, and 7%, respectively, for the water supply objective and 34%, 346%, and 22%, respectively, for hydropower generation. For projected future conditions, the proposed operations strategy would increase RRV by 7%, 219%, and 11%, respectively, for water supply and 19%, 136%, and 13% for hydropower generation. Synthesis of the results suggests significant benefits for reliability and resilience of water supply and hydropower are possible with slight operational adjustments. Overall, the integrated performance analysis supports the need to develop an optimized operations rule for Tarbela to adapt to projected climate and demand scenarios.

Sign in / Sign up

Export Citation Format

Share Document