小浪底水库拦沙初期调控流量分析论证

Argumentationabout Flow Dischargeto be Controlled During Initial Operation Periodof Xiaolangdi Reservoir

根据黄河下游河道冲淤特性 ,从减淤角度出发 ,分析了小浪底水库初期运用的上限及下限调控流量。对得出的调控流量从下游河道河势及工程险情、下游河道的减淤效果、水库的淤积发展及综合效益 4个方面作了进一步的论证。经综合比选 ,水库拦沙初期 ,调控下限流量采用 80 0m3 /s ,调控上限流量采用 2 60 0m3 /s。以后随着下游河道冲刷的发展、河势的调整及整治工程的建设 ,在条件适宜时 ,调控上限流量可采用 3 70 0m3 /s ,以适当提高下游河道的减淤效益。

BothupperandlowerlimitsofthedischargeforflowandsedimentregulationininitialoperationofXiaolangdiReservoirareanalyzedinaccordancewithscouringanddepositioncharacteristicsofthelowerYellowRivercourseas wellassedimentationreduction .Theanalyzedresultsarefurtherprovedinaspectofriverpattern ,potentialdangerintrainingworks ,effectsofsedimentationreductioninthelowerreaches ,developmentofsedimentationonthereservoir andoverallbenefits .Throughcomparisons,thelowerlimitisassumedtobe 80 0m3/sandupperlimit 2 6 0 0m3/sin theinitialoperationperiodoftrappingsediment.Later ,withdevelopmentofscouringinthelowerrivercourse ,ad justmentofriverpatternandconstructionoftrainingworks ,theupperlimitcanbecome 370 0m3/s ,ifconditionsare appropriate ,soastoincreasethebenefitofsedimentationreductioninShandongriversection .