Implementation and Comparison of Reservoir Operation Strategies for the Hoa Binh Reservoir, Vietnam using the Mike 11 Model

Abstract

Hoa Binh is the largest reservoir in Vietnam. It has been operated since 1990 with the main purposes of flood control in the Red River basin and hydropower generation. Because these different purposes always cause conflicts and disputes during the flood season, it is desirable to improve the current operational regulations of the reservoir. In this paper, the operation rules of the reservoir are analysed by applying the Mike 11 river modelling tool. The model set up includes the main rivers and tributaries of the Red River basin and a logical decision tree defining the reservoir regulation. These strategies define the reservoir release as function of the time of the year, the actual reservoir stage, and the water level forecast at Hanoi. A data set consisting of twenty years of flood season data was used to evaluate the control strategies with respect to flood control and hydropower generation. The reservoir operation using the complete control system and the current as well as alternative regulation strategies has been evaluated and compared to the actual operation practice. Results showed that the implemented control system performs better than the actual operation. In addition, lowering the target downstream water level for flood control improves the operation with respect to both flood protection and hydropower Water Resour Manage (2008) 22:457-472 generation. An alternative strategy where the target water level in the reservoir is increased can improve hydropower generation but at the expense of a reduced flood protection.

An analytical framework for flood water conservation considering forecast uncertainty and acceptable risk

“…Flood control requires a certain amount of empty storage during the flood season, while water conservation requires certain storage of water for current and future uses for irrigation, recreation, and hydropower generation. Many investigators have studied the trade-off between flood control and water conservation purposes [Croley et al, 1979;Krzysztofowicz and Duckstein, 1979;Datta and Houck, 1984;Simonovic and Burn, 1989;Jain et al, 1992;Hsu and Wei, 2007;Ngo et al, 2007Ngo et al, , 2008Wei and Hsu, 2009]. For example, Krzysztofowicz and Duckstein [1979] developed a preference criterion for reservoir flood control with consideration of water conservation under uncertain conditions.…”

Probabilistic-Multiobjective Comparison of User-Defined Operating Rules. Case Study: Hydropower Dam in Spain

“…On the one hand, many dams are still operated based on such fixed predefined rules [2,6,7], despite the development of novel optimization techniques, especially evolutionary algorithms. Oliveira and Loucks [2] and Labadie [4] offered an explanation for the gap between theory and practice.…”

“…Therefore, it is necessary to improve the effectiveness of reservoir operations to optimize the benefits of existing systems [4]. It is important to perform this task within a more systematic and analytical framework [7].…”

“…Many studies have focused on multipurpose reservoir flood control operations, such as Ngo et al [7], Tavares and Kelman [9], Guariso et al [10], Lara [11], Marien et al [12], Turgeon [13] and De Paes and Brandão [14], among others.…”

“…Additionally, many of the studies conducted in this research area used a relative short inflow series to assess the behavior of a certain operating rule ( [7,14,16,22], among others). The conclusions achieved regarding the performance of flood control strategy may be limited to similar hydrological scenarios.…”