基于GMS的傍河应急水源地地下水资源评价

EVALUATION ON THE GROUNDWATER RESOURCES IN RIVERSIDE EMERGENCY WATER SOURCE BASED ON GMS

依据铜陵太平-钟仓应急水源地水文地质条件构建水文地质概念模型.在此基础上,利用三维可视化软件GMS建立水源地地下水流数值模拟模型,并对模型进行了识别和验证.模型模拟期为一个应急供水周期180 d(2017-01～2017-06),水源地开采层位为承压水.模拟结果表明:在采用均匀布井方案和限定开采井水位降深不超过承压含水层顶板的条件下,水源地允许开采量为11.94×104m3/d,达大型水源地规模(5×104m3/d<允许开采量<15×104m3/d);水源地承压水在应急开采条件下,激发了长江侧渗补给量,袭夺量占水源地开采总量的27.82%.同时,通过模型模拟数据对傍河水源地地下水与地表水转换规律进行了初步探讨.

The hydrogeological conceptual model is constructed according to the hydrogeological conditions of Taiping-Zhongcang emergency water source in Tongling City.On this basis,the numerical simulation model of groundwater flow is established by 3D visualization software GMS,and then identified and verified.The simulation period is an emergency water supply cycle of 180 days(Jan.through Jun.,2017)with confined groundwater as the mining layer.The results show that the allowable exploitation of water source is 11.94×10^4 m^3/d,which reaches large scale(5×10^4-15×10^4 m^3/d),under the condition of uniform distribution of wells,with mining well level drawdown not exceeding the roof of confined aquifer.Under the condition of emergency exploitation,the lateral seepage supply of Yangtze River is stimulated,accounting for 27.82%of the total water exploitation amount.The simulation data is also used for preliminary study of the conversion rules between ground and surface water.