In 2022,the Changjiang River Basin encountered a basin-wide drought with the sharp shift from abundant to scarce inflow.The upstream reservoir group with the Three Gorges Reservoir as the core lacked the support of research on water replen-ishment scheduling during the dry period.In order to investigate the water replenishment operation strategy of the Three Gorges Reservoir during the dry period,firstly the operation practice of the upstream reservoirs in 2022 was reviewed.Then the relation-ship between the water level at each control site and the Three Gorges Reservoir discharge during the dry period was analyzed.Af-ter that,the water operation trial method was adopted to study the water storage target and the guarantee of water supply of the Three Gorges Reservoir under different water conditions and operation parameters.Finally,a strategy of water replenishment opera-tion of the Three Gorges Reservoir was proposed for the extreme dry year.Then this strategy was verified by the typical dry year 2006.Resultsshowedthatitismorereasonableforthe Three Gorges Reservoirtodischarge6 000 m3/sunder40%～50%less incoming water,6 500～7 000 m3/s under 30%less incoming water,and 7 000～7 500 m3/s under 10%～20%less incoming water.Accordingly,the Three Gorges Reservoir can provide"basic guarantee"for downstream water supply targets in the case of extra unfavorable inflow,"limited guarantee"for downstream water supply targets in the case of relatively unfavorable inflow,"full guarantee"for downstream water supply targets in generally unfavorable inflow conditions.The research findings can provide a ref-erence for the water replenishment operation of the Three Gorges Reservoir during extreme dry years.
关键词
水量调度试算/特枯水年/补水调度策略/三峡水库
Key words
water scheduling trial method/extreme dry year/water supply strategy/Three Gorges Reservoir
维普
万方数据