摘要
综合考虑大武水源地复杂的水文地质条件,运用三维数值模拟技术,采用断层带状剖分方法,在大武水源地建立了地下水流动的三维数值模型。模型采用任意多边形网格有限差分法求解,把断层带作为单独的水文地质参数分区参与模型运算,较好地刻画了断层的性质,模拟计算水位结果与观测水位资料拟合检验效果良好。为了保证大武水源地岩溶地下水能够合理的持续开发利用,在此模型基础上和在不考虑上游太河水库放水条件下,模拟计算得出了平水段和枯水段水源地地下水的允许最大可开采量分别为39.7万m3/d和26.2万m3/d。
Complicated hydrogeologicaI condition in Dawu well field is considered comprehensively in the paper. Furthermore, by means of arbitrary polygon grid finite difference method, the 3-D numerical model of the groundwater flow is established in Dawu karst aquifer system. In order to describe the property of the fault properly, it has been divided into zonal mesh, and the fault zone is considered an individual hydrogeologic parameter subarea in the model. The simulated values agree well with the observation data. In order to ensure the sustainable exploitation of groundwater resources without the discharge from the upriver Taihe reservoir, the maximal groundwater exploitation amount in the study area during ordinary precipitation period and low precipitation period is calculated respectively with the model. The result is 39.7 × 10^4m3/d and 26.2× 10^4m3/d.
出处
《中国岩溶》
CAS
CSCD
北大核心
2008年第2期182-188,共7页
Carsologica Sinica
基金
国家自然科学基金项目(No.40672170)
中国科学院“百人计划”项目资助
关键词
岩溶含水系统
断层带状剖分
三维数值模拟
地下水开采
大武水源地
karst aquifer system
zonal mesh of fault
3-D numerical simulation
groundwater exploitation
Dawu well field
