Graded and staged drought limit water level design and control method for reservoir

Abstract

The invention provides a graded and staged drought limit water level design and control method for a reservoir, and belongs to the technical field of drought control scheduling. Firstly, a water supply guarantee target is analyzed and water supply requirements are designed. Secondly, reservoir runoff processes of different early warning levels are designed y examining the reliability, consistency and representativeness of long-series hydrological data; and the seasonal characteristics of factors such as reservoir runoff, reservoir operation water level and water supply demand are comprehensively considered, and drought early warning and staging are carried out on hydrological years. Thirdly, according to the designed water demand process and the water supply guarantee priority, a graded and staging drought limit water level water supply rule is determined, and graded and staging drought limit water levels are preliminarily determined; and finally, based on long-series runoff process simulation, grading and staging drought limit water level rationality analysis and adjustment are carried out. According to the rationality analysis method based on long-series simulation and the reservoir drought limit water level feedback correction method, the requirements for the system water supply guarantee rate and the damage depth in engineering application can be comprehensively considered, calculation is rapid and convenient, and the method is suitable for engineering application and popularization.

Description

technical field [0001] The invention belongs to the technical field of anti-drought dispatching, and relates to a design and control method of drought-limited water levels of reservoirs in stages. Background technique [0002] Affected by climate change and strong human activities, extreme drought events in my country have become more and more intense in recent years. At the same time, with the rapid development of economy and society, the demand for water has increased rapidly, and the contradiction between supply and demand of water resources has become increasingly prominent, seriously restricting the economic and social development of our country (Qu Yanping, Lu Juan, Su Zhicheng, et al. Review and Prospect of Drought Relief and Disaster Mitigation[J]. Journal of Hydraulic Science, 2018, 49(01):115-125.). Reservoirs are important water storage projects. Establishing drought-resistant characteristic indicators of reservoirs and guiding the rational allocation of water re...

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Problems solved by technology

[0004] However, the above studies only considered the water supply guarantee rate or the water supply requirements of a certain aspect of the overall water shortage degree of the system when determining the drought limit water level, and did not fully consider the requirements of the system water supply guarantee rate and damage depth in engineering applications.

At the same time, the determination of the above-mentioned drought limit water level all depends on the optimization method, which has a high technical threshold and difficulty in popularization and application

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