近50年鄱阳湖形态和水情的变化及其与围垦的关系

Study on the Relationship between Shape,Water Regime and Innings of Poyang Lake

根据 1954、 1957、 196 1、 196 5、 196 7、 1976、 1984年量测的鄱阳湖高程与面积、容积关系 ,分析鄱阳湖不同时期的形态参数及其变化特征 ;统计年最高水位的变化 ,用以揭示水情变化特点。利用典型年交叉调洪计算结果 ,探讨围垦对洪水位的影响 ;建立洪水位围垦效应与围垦面积的关系 ,用以反映洪水位围垦效应随围垦程度而变化的规律 ;根据退垦效益与退垦面积的关系和湖区大中型圩堤的堤高现状 ,确定鄱阳湖退垦还湖面积。

Based on the relationship survied between the level, the area, and the storage of Poyang Lake of 1954, 1957, 1961, 1965, 1967, 1976, and 1984, the shape parameters and its variabilities of Poyang Lake were analyzed, and the variabilties of the yearly maximum level were estimated to reveal the variabilities of water regime. The effects of the innings on the flood levels were researched by using the crossing storage routings of the typical years in order to estabilish the relationship between the effect of the flood level inning effects and the embanked areas reflecting the variabilities of flood innings with the innings. The areas restoring embanked areas to natural state were determined based on the relationship between the benefit of restoring embanked areas to natural state and the states of closing levee levels for large and middle size closing levees.