地下水流数值模型内部参数灵敏度分析  

Sensitivity Analysis of Parameters on Numerical Model of Groundwater Flow

作　　者：郝静[1,2] 张永祥[1,2] 薛潇[1,2] 冉令坦[1,2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]水质科学与水环境恢复工程北京市重点实验室,北京100124

出　　处：《人民黄河》2013年第6期83-86,共4页Yellow River

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07212-003)

摘　　要：以北京市朝阳区为研究区域,建立地下水水流数值模型,并对模型进行了识别。选取与地下水流场密切相关、反映地下水系统内部性质的渗透系数K与给水度μ作为敏感性分析的因子,采用单一参数灵敏度分析法与多参数组合灵敏度分析法,选取流场上游处和下游处的两个地下水头观测点进行参数变化引起的水位变幅分析,从而识别出影响地下水流场的主控因素。结果表明:研究区地下水流场对渗透系数K具有很高的敏感性;渗透系数K与给水度μ两个参数对区域地下水流场的影响中,渗透系数K占优。Taking Chaoyang District in Beijing Municipality as study area,this paper established a numerical model of groundwater flow and identified the model.Selecting permeability coefficient K and specific yield μ as sensitivity analysis factors which closely relate to the groundwater flow field and reflect the internal properties of groundwater system,adopting the single parameter sensitivity analysis method and multiple parameters combining sensitivity analysis method,and selecting two groundwater observation points on the upstream flow and the downstream flow,this paper analyzed water level amplitudes caused by the parameters variation and identified the main controlling factors of influencing the groundwater flow field.The results show that the permeability coefficient K has a high sensitivity on groundwater flow field and it influences on groundwater flow field more than specific yield μ.

关 键 词：地下水流 灵敏度 渗透系数 给水度 

分 类 号：TV211.1[水利工程—水文学及水资源]