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Study on the method for determining drought limit water levels of reservoirs based on supply
regulation and joint optimization scheduling

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SANG Xuefeng ，HE Sheng ，YAN Ziqi ，CHEN Gang ，JIANG Yunzhong ，YU Fuliang 1

（1. State Key Laboratory of Water Cycle and Water Security，China Institute of Water Resources and Hydropower Research，Beijing

100038，China；2. Suzhou University，Suzhou 234000，China；3. Yunnan Survey and Design Institute of

Water Conservancy and Hydropower，Kunming 650021，China）

Abstract：Drought-limited water level （DLWL）of reservoir is one of the important indexes to start drought response

and drought-resistant operation of reservoir. On the problem of determining and applying DLWL of each reservoir

under the joint operation of reservoir groups，the application rules of DLWL based on supply side regulation are put

forward，and the principle of wide and shallow damage is used to construct the optimal calculation model of DLWL.
The feasibility and rationality of the optimization algorithm for the drought-resistant operation of reservoir group were
verified by the application of large and medium-sized reservoirs in the receiving area of the water transfer project in
central Yunnan. The results show that the DLWL of the reservoirs can be determined simultaneously by the method

proposed in this paper，through the comparative analysis of multiple schemes，the optimized DLWL can significantly

reduce the water shortage rate and the number of months of severe water shortage in the dry year，effectively avoid the fre⁃

quency of subsequent severe water shortage events，and improve the drought operation capability of the reservoir group in
the dry year. The results can provide technical references for reservoir management units and drought operations authorities

to formulate DLWL for reservoir group，and carry out regional drought warning and defense decision-making.

Keywords：reservoir group；drought-limited water level；supply regulation；wide and shallow damage；drought

relief operation
（责任编辑：韩 昆）
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