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.

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.

Ice jam mitigation

1990 ◽  
Vol 17 (5) ◽  
pp. 675-685 ◽  
Author(s):  
Harold S. Belore ◽  
Brian C. Burrell ◽  
Spyros Beltaos
Keyword(s):  
Key Words ◽  
Carrying Capacity ◽  
Flood Control ◽  
Human Life ◽  
Water Levels ◽  
Economic Losses ◽  
River Ice ◽  
Ice Jams ◽  
Ice Jam ◽  
Ice Breakup

In Canada, flooding due to the rise in water levels upstream of an ice jam, or the temporary exceedance of the flow and ice-carrying capacity of a channel upon release of an ice jam, has resulted in the loss of human life and extensive economic losses. Ice jam mitigation is a component of river ice management which includes all activities carried out to prevent or remove ice jams, or to reduce the damages that may result from an ice jam event. This paper presents a brief overview of measures to mitigate the damaging effects of ice jams and contains a discussion on their application to Canadian rivers. Key words: controlled ice breakup, flood control, ice jams, ice management, river ice.

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>

Systems Theory for the civil engineer Comparison of algorithms for hydropower optimization: Manitoba Hydro case study

1991 ◽  
Vol 8 (1) ◽  
pp. 3-8
Author(s):  
Karolj K. Reznicek ◽  
David A. Cormie ◽  
Paul E. Barritt-Flatt ◽  
Slobodan P. Simonovic
Keyword(s):  
Civil Engineer ◽  
Systems Theory ◽  
Comparison Of Algorithms ◽  
Hydropower Optimization ◽  
Manitoba Hydro

Food Submergence Calculation and Analysis Using Digital Elevation Model and Geographical Information System

2014 ◽  
Vol 571-572 ◽  
pp. 792-795
Author(s):  
Xiao Qing Zhang ◽  
Kun Hua Wu
Keyword(s):  
Information System ◽  
Digital Elevation Model ◽  
Flood Control ◽  
Large Scale ◽  
Geographical Information ◽  
Economic Losses ◽  
Model Data ◽  
Digital Elevation ◽  
Elevation Model ◽  
Digital Elevation Model Data

Floods usually cause large-scale loss of human life and wide spread damage to properties. Determining flood zone is the core of flood damage assessment and flood control decision. The aim of this paper is to delineate the flood inundation area and estimate economic losses arising from flood using the digital elevation model data and geographic information system techniques. Flood extent estimation showed that digital elevation model data is very precious to model inundation, however, in order to be spatially explicit flood model, high resolution DEM is necessary. Finally, Analyses for the submergence area calculation accuracy.

scholarly journals Small watershed management as a tool of flood risk prevention

2014 ◽  
Vol 364 ◽  
pp. 243-248 ◽  
Author(s):  
J. Jakubinsky ◽  
R. Bacova ◽  
E. Svobodova ◽  
P. Kubicek ◽  
V. Herber
Keyword(s):  
Flood Control ◽  
National Level ◽  
Field Research ◽  
Global Scale ◽  
Control Measures ◽  
Economic Losses ◽  
Economic Damage ◽  
Research Knowledge ◽  
Natural Risk ◽  
Small Streams

Abstract. According to the International Disaster Database (CRED 2009) frequency of extreme hydrological situations on a global scale is constantly increasing. The most typical example of a natural risk in Europe is flood – there is a decrease in the number of victims, but a significant increase in economic damage. A decrease in the number of victims is caused by the application of current hydrological management that focuses its attention primarily on large rivers and elimination of the damages caused by major flood situations. The growing economic losses, however, are a manifestation of the increasing intensity of floods on small watercourses, which are usually not sufficiently taken into account by the management approaches. The research of small streams should focus both on the study of the watercourse itself, especially its ecomorphological properties, and in particular on the possibility of flood control measures and their effectiveness. An important part of society’s access to sustainable development is also the evolution of knowledge about the river landscape area, which is perceived as a significant component of global environmental security and resilience, thanks to its high compensatory potential for mitigation of environmental change. The findings discussed under this contribution are based on data obtained during implementation of the project "GeoRISK" (Geo-analysis of landscape level degradation and natural risks formation), which takes into account the above approaches applied in different case studies – catchments of small streams in different parts of the Czech Republic. Our findings offer an opportunity for practical application of field research knowledge in decision making processes within the national level of current water management.

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