Water Resources Planning and Management
Operating rule curves played an important role in managing multi-reservoir system, which formerly formulated focus on flood control, water supply, hydroelectric and irrigation and so on economic efficiency aspect, but is less consideration in downstream ecological Requirement. Maybe this was the major reason that the river ecosystem suffered the serious destruction after reservoirs being constructed. At present the key and difficulty of operating multiple reservoir system and managing the basin water resources is how to carry out the multi-objective coordinated utilization under the premise of maintaining the original related benefit pattern. The satisfied degree of the river ecological water demand is the important symbol which whether the rivers health can maintain. In the paper, in order to alleviate the multi-water used household competition contradiction and change the unreasonable present situation that economic society water use occupied the ecological environment water use for a long time, draws up the multiple reservoirs water supply simulation rules for different water used households, taking the rivers ecosystem as an independent water user. On the other hand, in order to solve the unification between optimality and feasibility of those dispatch plans, construct the optimization scheduling model objective function that make the multiuser water supply guarantee rate maximize and balance, and then the Multiple Reservoir system partition joint operation model is established by coupled the simulation model with objective function. For the complexity of the above model, the corresponding solving method is put forward which based on the real code accelerating genetic algorithm and the system simulation technique. As an example, use the above model to the multiple reservoir system consisting of the Panjiakou reservoir, Daheiting reservoir and Taolinkou reservoir. Results indicated that the proposed model is very effective, compared with the present operation mode, can obviously enhance the water supply guarantee rate of the river ecosystem under the premise of maintaining flood control and the all users’ benefits.
Nanjing Hydaulic Research Institute