Flood season grading drought limit water level optimization method giving consideration to supply and demand sides

By acquiring data from river control stations, tiered water supply demands, and flow parameters, and combining these with calculations based on low-water inflow samples, the tiered drought limit water level during the flood season was optimized. This solved the problem that reservoirs could not simultaneously control flood risks and meet downstream water demand during the flood season, thus achieving comprehensive scheduling optimization of reservoirs under complex hydrological scenarios.

CN122367098AActive Publication Date: 2026-07-10CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Patent Information

Application Number
CN202610847545.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-12
Publication Date
2026-07-10
Estimated Expiration
2046-06-12

AI Technical Summary

Technical Problem

During the flood season, reservoirs cannot effectively control flood risks and meet the downstream water demand at different levels at the same time, and cannot adapt to the comprehensive scheduling needs under complex hydrological scenarios.

Method used

By acquiring the control stations, tiered water supply demand, and flow parameters of the target river channel, and combining them with samples of water flowing during periods of drought, the initial tiered drought limit water level for the flood season is determined. A simulation model is then constructed to optimize the tiered drought limit water level for the flood season to match downstream demand, reduce the drought relief flow gap, strictly control the risk of flood control losses, and ensure the reservoir's own drought resistance capacity.

Benefits of technology

It enables matching downstream tiered water supply demands during the flood season, narrowing the drought relief flow gap, while strictly controlling the risk of flood damage, improving the comprehensive scheduling efficiency of reservoirs, and adapting to collaborative optimization under complex hydrological scenarios.

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Abstract

The invention provides a flood season graded drought limit water level optimization method giving consideration to both sides of supply and demand, and the method comprises the steps: obtaining a downstream control station of a target river channel, graded water supply demand, an initial graded ex-reservoir flow parameter and a target graded ex-reservoir flow parameter, and carrying out the calculation based on a preset bias incoming water sample and the target graded ex-reservoir flow parameter; the initial flood season graded drought limit water level of the upstream reservoir is obtained; a supply side drought resistance capability parameter is determined according to historical operation data of the reservoir, a demand side target graded drought resistance flow gap parameter is determined based on the actual ex-reservoir flow and the target graded ex-reservoir flow parameter, and meanwhile the flood control loss condition risk value is determined according to the operation water level of the reservoir in the flood season and the river channel flood discharge capacity; a dispatching simulation model is constructed, multi-target optimization is carried out on the initial flood season graded drought limit water level, a target flood season graded drought limit water level giving consideration to the supply and demand sides is obtained, the method can adapt to complex hydrological scenes such as flood season anti-dry and flood and drought rapid turning, and downstream graded water use requirements, the reservoir drought resistance and flood control safety can be cooperatively guaranteed.
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