鄱阳湖吴城站水位变化及修河对大湖池和沙湖水位的影响分析

为了深入分析赣江和修河对鄱阳湖国家级自然保护区大湖池和沙湖水位的影响,通过1953~2010年期间58年修河吴城站水位实测资料及2010年大湖池和沙湖水位数据,对赣江修河水位的基本特征、演变趋势及江湖关系进行分析。结果表明:(1)吴城水位变化表现为年过程线呈"单峰型"特征;在58年长时间尺度上水位的年内变化规律稳定,最高水位通常出现在6、7、8和9月,最枯水位出现在12、1、2和3月;(2)修河水位与大湖池、沙湖水面最大相差水位分别为5.43m和5.30m;枯水季节修河与大湖池、沙湖没有水流联系,因闸口控制水位,大湖池、沙湖常年不干涸;修河吴城站水位高于16.11m大湖池与修河连通,修河吴城站水位高于16.45m沙湖与修河连通。

Influence of Water Level Variation at Wucheng Station on Water Levels of Dahuchi and Shahu Lakes

To better understand the impact of the rivers of Ganjiang and Xiuhe on the water levels of the lakes of Dahuchi and Shahu in the Poyang Lake National Nature Reserve, the characteristics of the water level of the Xiuhe River and the variation trend were analyzed based on the measured water level at Wucheng Station on the Xiuhe River from 1953 to 2010. The results indicates that (1) the water level variation at the Wucheng Station show the characteristics of "single peak", the annual water level variation is stable in the scale of 58 years, the highest level often appear in June, July, August or September while the lowest level appear in December, January, Feboray or March; (2) The difference of water level between the Xiuhe River, Dahuchi Lake and Shahue Lakes are 5.43m and 5.30m respectively. The Dahuchi Lake will get in connection with the Xiuhe River when the water level at the Wucheng Station is higher than 16.11 m, and the Shahu Lake will get in connection with the Xiuhe River when the water level get over 16.45 m.