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近十几年来,黄河中上游来沙偏少,下游河道积淤也显著减轻。其原因究竟是治理的作用,还是有利的水文条件决定的?弄清这个问题,对于流域治理规划和治黄工程设计部有一定的实际意义。
In the past ten years or so, the sediment in the middle and upper reaches of the Yellow River has been less than that in the middle and upper reaches of the Yellow River, and siltation of the lower reaches of the river has also been significantly reduced. Whether the reason is the role of governance or the favorable hydrological conditions? To clarify this issue has some practical significance for the planning and management of Yellow River Basin and the Yellow River Engineering Design Department.