论文部分内容阅读
淮河中游河床纵断面倒比降是造成现代淮河中游地区严重洪涝灾害的根本原因 .该倒比降的形成与淮河入洪泽湖河口水下拦门沙的形成与演变及洪泽湖湖底淤高有关 .2 0世纪 50年代以来 ,由于河流输沙量和含沙量不断减少 ,淮河中游上段河床处于侵蚀状态 ,倒比降又有新的发展 .根治倒比降的关键是 ,消除或尽可能减少洪泽湖面在中游河流地貌发育中的基准面作用 .
The vertical and horizontal drop of the riverbed in the middle reaches of the Huaihe River basin is the root cause of serious floods and disasters in the middle reaches of the Huaihe River.The formation and evolution of the sandstorm in the estuary of the Huaihe River at the estuary of Hongze Lake and the siltation of the bottom of Hongze Lake Since the 1950s, due to the continuous decline of sediment transport and sediment concentration in the river, the upper reaches of the middle reaches of the Huaihe River have been eroded, and new developments have taken place in the upper reaches of the Huaihe River. The key to radical downfall is to eliminate or minimize Reduce the Hongze Lake in the middle reaches of the river landscape geomorphology role.