摘要
通过辨识江汉平原含水系统的水文地质结构,深入分析了地下水位动态变化特征及其影响因素,进而揭示了研究区地下水时空演变规律。结合地下水流系统分区分析了研究区的降雨-径流关系和地下水动态类型。同时,运用数理统计方法分析了累计水位升幅和累计降雨量之间的关系。结果表明:研究区内地表水除丰水期补给地下水外,其余时段地下水补给地表水;研究区不同含水层地下水位关系总体为深层孔隙承压水位>中层孔隙承压水位>浅层孔隙潜水位;研究区地下水对降雨入渗产生的滞后效应表现为低水位期滞后5~7 d,高水位期滞后1~2 d。研究结果对该地区地下水资源的评价管理具有现实意义。
By identifying the hydrogeological structure of aquifer system,the dynamic characteristics of groundwater level and its influencing factors were analyzed,and then we revealed the temporal and spatial evolution process of groundwater in Jianghan plain. First,we researched the rainfall-runoff relationship and dynamic type of groundwater by partitioning groundwater flow system. Then,we applied mathematical statistics to analyze the relation of cumulative increase of ground water level and cumulative rainfall. The results indicate that the surface water of study area is the discharge area of shallow groundwater except in wet season when surface water of study area recharged groundwater. The general tendency of groundwater level in different aquifers descends as deep pore pressure level,middle pore confined water,shallow pore water. Moreover,the rise of groundwater level lags behind the rainfall infiltration,and the lag time of low stand and high stand are 1-2 days and 5-7 days,respectively. The results have important directions to groundwater resources assessment and management in Jiang Han plain.
出处
《人民长江》
北大核心
2017年第18期33-38,共6页
Yangtze River
基金
国家自然科学基金项目“长江经济带地质环境综合调查工程”(12120114069301)
关键词
地下水位动态
地下水流系统
水文地质结构
降雨入渗滞后
地下水资源管理
江汉平原
groundwater level dynamic characteristics
groundwater flow system
hydrogeologic structure
rainfall infiltration lag effect
groundwater resoures management
Jianghan plain
