黄河水沙调控体系运行机制与效果研究

来源 :泥沙研究 | 被引量 : 0次 | 上传用户:flyskyxun
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完善水沙调控体系是应对黄河水少沙多、水沙关系不协调的关键措施.结合实测资料,计算了河道输沙能力,分析了水沙调控体系运行机制,计算了水沙调控体系对黄河水沙关系的调节作用,结果表明:河道输沙效率随着水流流量的增大而增大,且在平滩流量附近存在明显的拐点,骨干水库群联合调控可泄放接近下游河道最小平滩流量的大流量过程,提高河道输沙能力,减轻河道淤积.当黄河来沙8亿t,水库群拦沙期内通过拦沙和调水调沙,进入下游的水沙关系协调度小于1,水沙关系是协调的;正常运用期通过调水调沙可改善黄河水沙关系的不协调程度.与现状工程条件相比,水沙调控体系完善后的正常运用期可年平均减少下游河道淤积量1.28亿t,南水北调西线一期工程调水20亿m3前提下可进一步减少下游河道淤积量1.53亿t.
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