受三峡工程论证领导小组的委托,于1988年8月16至18日,由中国水利学会理事长严恺教授主持召开了长江三峡以上地区历年来沙变化趋势讨论会,参加会议的有来自水文泥沙等有关方面的专家、学者计50余名.会议围绕1.长江上游广大地区产沙的情况,2.对上游支流水库拦沙作用 Entrusted by the Leading Group of Three Gorges Project Demonstration, hosted by Yan Kai, Chairman of China Water Conservancy Society on August 18-18, 1988, a seminar on the trend of sediment change over the Yangtze River Three Gorges over the years was held. Participants from the conference included hydrostatic mud Sand and other relevant experts and scholars about more than 50. The meeting centered around 1. The situation of sediment production in the vast areas of the upper reaches of the Yangtze River 2. The role of the upstream tributaries reservoir sediment