基于改进RVA法的云龙水库流域生态调度研究
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昆明理工大学 电力工程学院水电系

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TV213.9

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)“质量能构架下水资源承载力演变的动态机理及其可持续性研究”(41061053)


Study on ecological regulation of Yunlong Reservoir Basin based on improved RVA method
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Faculty of Electric Power Engineering, Kunming University of Science and Technology

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    摘要:

    云龙水库是掌鸠河引水供水工程的水源工程,为满足昆明市的用水需求,云龙水库截蓄了大量径流来水,导致下游河道的生态用水难以得到满足,水文情势发生严重改变。本文探究在保障水库正常供水情况下,如何通过水库调度降低水库对下游河道原有水文情势的影响,减弱对生态环境的破坏。本文首先对RVA法进行改进,建立了基于改进RVA法的多目标生态调度模型,再使用EMO platform中内置的NSGA-Ⅱ算法对云龙水库流域内的双化水库和云龙水库进行连续5年的联合调度求解,得到了保障经济效益、社会用水需求和水文情势改变度最低的一组方案集,并使用Tennant法对得到的方案进行生态流量优度评价。结果表明,通过生态调度各水库下泄流量基本满足了生态基本用水需求,验证了模型的合理性。本文最后针对水库现状,提出了改善云龙水库供水与提高生态用水补偿能力的意见。

    Abstract:

    Yunlong Reservoir is the water source project of Zhangjiu River Diversion and Water Supply Project. In order to meet the water demand of Kunming City, Yunlong Reservoir intercepts and stores a large amount of runoff water, which makes it difficult to meet the ecological water demand of the downstream river channel and the hydrological situation has changed seriously. This paper explores how to reduce the impact of reservoirs on the original hydrological situation of downstream rivers and weaken the damage to the ecological environment through reservoir operation under the condition of ensuring the normal water supply of reservoirs. Firstly, this paper improves the RVA method and establishes a multi-objective ecological scheduling model based on the improved RVA method. Then, the NSGA-II algorithm built in the EMO platform is used to solve the joint operation of Shuanghua reservoir and Yunlong reservoir in the Yunlong reservoir basin for five consecutive years. A set of schemes with the lowest degree of economic benefit, social water demand and hydrological change is obtained, and the Tennant method is used to evaluate the ecological flow superiority of the obtained schemes. The results show that the discharge of each reservoir basically meets the basic ecological water demand through ecological scheduling, which verifies the rationality of the model. Finally, in view of the current situation of the reservoir, this paper puts forward suggestions on improving the water supply of Yunlong Reservoir and improving the compensation ability of ecological water.

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  • 收稿日期:2021-09-17
  • 最后修改日期:2021-09-18
  • 录用日期:2022-05-30
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