1956～2005年鄱阳湖入出湖悬移质泥沙特征及其变化初析

Characteristics of Sediment into and out of Poyanghu Lake from 1956 to 2005

利用江西省五大河流控制水文站与湖口水文站实测悬移质泥沙资料,分析鄱阳湖1956～2005年入出湖悬移质泥沙基本特征,揭示鄱阳湖入出湖悬移质泥沙在近50年的变化状况及其形成原因;在此基础上探讨鄱阳湖悬移质泥沙平衡情况及其发展态势。表明近20年鄱阳湖入湖悬移质泥沙逐渐减少,近10年出湖悬移质泥沙大幅增多,湖盆容积呈现出快速加大的趋势。

By using the observed sediment data from the control stations of the five main rivers and Hukou station,this paper ana- lyzed the characteristics of the sediment into and out of the Poyang Lake from 1956 to 2005 and their changes,and revealed the change causes of the sediment into and out of the Poyanghu Lake in recent 50 years. On the basis of this,the sediment balancing situation and the development tendency were studied. The resuhs show that the sediment into the lake was gradually decreased in recent 20 years,the sediment out of the lake was greatly increased in the recent 10 years,and the lake volume presented the tendency of rapid enlargement.