黄河调水调沙试验对下游河道行洪规律的影响

Impact Analysis of Water and Sand Diversion in Yellow River Basin on Flood Law of River Courses in Lower Reaches

山东省东明县高村河段在黄河下游河道具有一定的代表性。20世纪90年代,由于黄河下游持续小水高沙,低水期延长,主槽发生严重的淤积,河道行洪能力明显下降。2002年以来,黄河水利委员会通过小浪底水库进行了三次调水调沙试验,使该河段主河槽泥沙得到有效的冲刷,仅2003年5月至12月,山东河道(高村至汊2)主槽冲刷就达11756万m3,冲刷厚度0.23m,行洪能力得到大大提高。

River courses in lower reaches of the Yellow River in Gao Village of Dongming County in Shandong Province has certain representativeness to others. Since 1990, due to continuous low water level and high sand in the lower reaches of the river, a serious sedimentation resulted in the main river channel and flood discharge capacity of the river courses is decreased dramatically. Since 2002, three water and sand diversion experiments were conducted in the Xiaolangdi Reservoir by the Yellow River Conservancy Commission that effectively washed the main river channel. From May to December 2003, the washed-out sediment reached to 117.56 million cubic metre in the channel located in Shandong Province, with a depth of 0.23 m, resulting in a great improvement of flood discharging capacity.