灵敏度分析法确定水文地质参数的基本模型及其应用  

Basic model of sensitivity analysis method for determining hydro-geological parameters

作　　者：刘玉珍[1] 程世迎 

机构地区：[1]大连理工大学土木水利学院 [2]辽宁省水利厅水资源处,辽宁沈阳110003

出　　处：《水利学报》2006年第7期846-850,共5页Journal of Hydraulic Engineering

摘　　要：本文基于泰斯方程论述了灵敏度分析法确定水文地质参数的基本原理,即把水位降深看做是以导水系数和弹性释水系数为变量的函数,利用最小二乘法原理,计算求得理论降深与观测降深最佳拟合时的导水系数和弹性释水系数。针对目前只能在泰斯假设条件下利用非稳定流试验数据确定水文地质参数的问题,根据数值积分理论,推求了多种特征类型的降深计算模型和对应的灵敏度系数计算模型,列出了三种类型的推求结果。引用了两个抽水试验实例,根据编制的计算机程序,采用灵敏度分析法求解了水文地质参数,计算结果与实测资料一致。The theory of sensitivity analysis for determining hydro-geological parameters based on Theis theory is presented. The drawdown of pumping test is regarded as the function of variables determined by transmissibility coefficient and elastic discharge coefficient. The least squares method is applied to deduce the theoretical drawdown, transmissibility coefficient and elastic discharge coefficient for optimal fitting of the observed drawdown. Based on numerical integral theory several types of model for calculation of drawdown and corresponding sensitivity coefficient calculation model are obtained. The models are applied to calculate two pumping cases. The results show that the parameters determined by sensitivity method are satisfactorily agreed with the pumping test data.

关 键 词：灵敏度 泰斯公式 水文地质参数 抽水试验 降深 非稳定流 

分 类 号：P641[天文地球—地质矿产勘探]