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基于野外定点监测数据,运用统计学方法解析鄱阳湖区地下水位年内分布特征和动态变化,辨析湖水和典型区地下水之间的侧向水力联系与程度。统计结果表明,不同洲滩地下水埋深变化范围约–8.1~–0.1 m,洲滩地下水和湖水在6~9月份保持完全水力连通。湖水位和洲滩地下水位动态变化呈现高度一致性,表明了洲滩地下水和湖水具有密切的侧向水力联系。湖岸带不同典型区的地下水埋深变化范围介于–10~–2.2 m。湖岸带地下水位与湖水位并不具有日时间尺度变化上的高度一致性,但两者却很好呈现了月尺度上的较好一致性,表明了湖岸带地下水与湖水之间具有一定的相互关系和水力联系。小波分析得出,湖水位和洲滩、湖岸带不同典型区的地下水位均在60 d尺度的周期上存在着极大可能的显著相关,总体上两者呈正相关关系变化,表明湖水和洲滩地下水具有密切的水力联系,但与湖岸带地下水的侧向水力联系可能体现在个别典型时段。为今后鄱阳湖地下水方面的相关研究奠定基础,也为鄱阳湖湿地生态环境保护、水资源评价等方面提供科学依据和参考。
Based on the field fixed point monitoring data, the distribution characteristics and dynamic changes of groundwater table in Poyang Lake area were analyzed by statistical method, and the lateral hydraulic connection between groundwater and lake water in typical areas was analyzed. The statistical results show that the groundwater depth varies from -8.1 to -0.1 m in different continental beaches, and the groundwater and lake water in the beach keep full hydraulic connection between June and September. There is a high degree of consistency between the lake water level and the groundwater level in Chau Beach, indicating a close lateral hydraulic connection between Chau Beach groundwater and the lake. The groundwater depth varies from -10 to -2.2 m in different typical areas of the lakeshore. The lacustrine zone groundwater level and the lake level do not have the high degree of consistency in the time-scale changes, but both of them show a good consistency on the monthly scale, indicating that there is a certain mutual relationship between the lacustrine groundwater and the lake water Relationship and hydraulic connection. Wavelet analysis shows that there is a highly significant correlation between the water table and the groundwater table in different typical areas of the lakeshore and lakeshore zone on the 60-day scale. Generally speaking, there is a positive correlation between the water table and the lakes and beaches Groundwater has a close hydraulic connection, but lateral hydraulic connections with lakeshore groundwater may be reflected in a few typical periods. This will lay the foundation for the future research on groundwater in Poyang Lake and provide scientific basis and reference for the ecological environment protection and water resources evaluation of Poyang Lake wetland.