运用稳定流水力层析法刻画含水层异质性  

CHARACTERIZATION OF AQUIFER HETEROGENEITY USING STEADY STATE HYDRAULIC TOMOGRAPHY

作　　者：陈小林[1] 董海洲[1,2] 苌坡 

机构地区：[1]河海大学岩土工程研究所,南京210098 [2]河海大学地球科学与工程学院,南京210098

出　　处：《低温建筑技术》2014年第11期83-86,共4页Low Temperature Architecture Technology

基　　金："十二五"国家科技支撑计划项目(2012BAB03B01)

摘　　要：水力层析法是通过一些列连续交叉抽水试验获得大量的水头响应数据,利用连续性线性估计方法(SLEE)对水头数据进行反演分析,从而获得水力参数的空间分布信息。文章通过vsaft2软件设定一个1m×20m的一维随机含水层,在含水层不同的位置分别进行抽水实验,运用SLEE方法对含水层渗透系数进行反演估计。数值实验表明,在观测井充足情况下稳定流水力层析法能够有效的刻画含水层异质性;在观察井较少情况下,通过融合多次抽水数据得到的渗透系数估计精度显著提高;抽水速度不影响含水层渗透系数估计。During hydraulic tomography, a large number of hydraulic heads（ i. e. , aquifer responses） are collected from a series of pumping or injection tests in an aquifer. These responses are then used to aquire the spatial distribution of hydraulic parameters of the aquifer using SLEE. The paper set an aquifer which is a one-dimensional random domain of 1 × 20 square meters by Vsaft 2, water is sequentially pumped from an aquifer at different position. The number experiments demonstrate, when observation wells is more steady flow hydraulic tomography can effectively characterize aquifer heterogeneity. When observation wells is fewer, the integration of several pumping can significantly improve the estimate accu- racy of permeability coefficient. The pumping rate has no effect on the estimate.

关 键 词：稳定流 水力层析法 含水层 异质性 

分 类 号：TU463[建筑科学—结构工程]