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通过分析历史和近期长江中游的泥沙输移变化 ,深入剖析了该区域洪灾形势愈演愈烈的原因。长江中游泥沙输移变化主要表现为泥沙淤积向干流螺山～汉口河段的转移 ,累积性的泥沙淤积引起了干流和湖区全局性水患加剧。随着中上游人类活动加剧 ,区域水沙灾害发展趋势恶劣。根治长江中游水沙灾害的主要途径是将沙量减少 1.8亿t,远期措施是通过上游水保和水库拦沙减少来沙 ,近期措施主要是处理好中游泥沙的淤积部位。三峡建库后出库沙量过程和对应的下游冲刷回淤过程也说明减少 1.8亿t沙量是必要的
By analyzing the historical and recent changes of sediment transport in the middle reaches of the Yangtze River, the reasons for the intensifying flood situation in this area are analyzed in depth. Sediment transport in the middle reaches of the Yangtze River is mainly characterized by the transfer of sediment to the Luoshan-Hankou section of the main stream, and the cumulative sedimentation has led to an overall increase in floods in the main stream and the lake. With the intensification of human activities in the upper and middle reaches, the development trend of water and sediment disaster in the region is in dire trend. The main approach to eradicating water and sand disasters in the middle reaches of the Yangtze River is to reduce the amount of sediment by 180 million tons. The long-term measures are to reduce sediment and sediment flow through the upstream reservoirs and reservoirs, and recent measures are mainly to deal with siltation sites in the middle reaches. After the Three Gorges Reservoir out of the process of sediment discharge and the corresponding downstream scouring process also shows that the reduction of 180 million tons of sand is necessary