台兰河流域地下水系统数值模拟

Numerical Simulation of Groundwater System in the Tailan River Basin

地下水数值模拟是地下水在多孔介质中分布过程机理的模拟,以流域水量均衡为基础,应用ArcView GIS与FEFLOW专业地下水模拟软件,根据研究区水文地质勘探资料、抽水试验及地下水水位长期观测资料,建立了内陆河流域二维地下水运动模拟模型。采用Kringing、Aki-ma插值方法和Galerkin有限元三角形网格剖分技术,求解模型,模拟了台兰河流域地下水运动特征。从模拟结果可以看出,所建立的水文地质概念模型和数学模型是正确的,选取的水文地质参数和计算的源汇项基本合理,模拟结果与实测数值比较吻合,符合台兰河流域地下水的实际情况,能够进行该区域地下水的动态预报,可为研究区水资源的合理开发提供科学依据和技术指导。

The numerical simulation of groundwater is the mechanism simulation of groundwater in the porous medium.Based on water balance of river basin and the hydrological geology,hydrological geological parameter obtained from wells and the long term observed groundwater level data by using the ArcView GIS and professional groundwater software—FEFLOW,the two dimensional groundwater flow simulation model were built in the arid inland river basin.Adopting interpolated method of Kringing and Akima and the finite element triangular technique of Galerkin,and through the identified model,dynamics change characteristics of groundwater was simulated in the Tailan River Basin.The results showed that hydrological geology model and mathematics model were correct and the chosen hydrological geological parameter and calculated source/sink factors of groundwater were reasonable.The simulation results and observation values were inosculation and accorded with true condition in the Tailan River Basin.The groundwater model can be used to forecast the dynamic change of groundwater,which offers scientific basis and technical instruction for the reasonable exploitation of groundwater resource in the arid inland river basin.