蚌湖与鄱阳湖水量交换关系的分析

ANALYSIS ON RELATIONSHIP OF WATER EXCHANGE BETWEEN BANGHU LAKE AND POYANG LAKE

根据蚌湖和鄱阳湖修水站的水位同步观测资料,结合湖区地形,分析蚌湖与鄱阳湖的水量交换关系,并利用三峡工程对鄱阳湖修水、星子、都昌站水位影响的预测结果,讨论三峡工程对蚌湖水情的影响。结果表明:（1）丰水期蚌湖水位与鄱阳湖水位以相同涨落率变化,呈现出高水位的一致性,三峡工程对鄱阳湖修水站丰水期的水位预测结果,可以用来表示丰水期三峡减泄流量对蚌湖水情的影响;（2）枯水期蚌湖与鄱阳湖之间,由天然堤几乎完全隔离而成为一个相对独立的湖泊,进出湖水量很小,水位相对稳定在13.80m左右,枯水期三峡增泄流量、一般年份不会超过蚌湖13.80m的天然堤漫堤水位,因此对蚌湖水情影响较弱,不会对越冬珍稀候鸟构成严重威胁;（3）蚌湖相对于鄱阳湖的水位变化,总体上无明显滞后效应,仅当水位在13.80～14.50m之间时,其水位涨落率小于鄱阳湖水位的涨落率,表现出滞后现象,但历时较短。

According to observed data at Banghu and Xiushui hydrologie stations, this paper in com-bination with topography of the lake region analyzes water exchange between Banghu Lake and Poyang Lake. On the basis of the prediction results of impacts of the Three-Gorges Project on water level at Xiushui, Xingzi and Duchang hydrologie stations in Poyang Lake, the au-thors analyzes the impacts of the Three-Gorges Project on water regime of Banghu Lake in detail.