分析二维水动力弥散试验数据的改进直线解析法  

Improved Linear-Analytical Method for Analyzing Two Dimensional Hydrodynamic Dispersion Test Parameters

作　　者：郭建青[1] 周宏飞[2] 王洪胜[1] 

机构地区：[1]长安大学,西安市710054 [2]中国科学院新疆生态与地理研究所,乌鲁木齐市830011

出　　处：《勘察科学技术》2011年第1期14-17,共4页Site Investigation Science and Technology

基　　金：973项目"干旱区绿洲化荒漠化特征及其时空格局"(编号:2009CB421301)

摘　　要：将描述两个观测孔的瞬时投放示踪剂、一维稳定流场、二维非稳定水动力弥散过程中的示踪剂浓度,在时空上变化的解析解分别进行了对数变换,可以推导出两个直线方程。根据适当的数据转换,能够分别得到两个直线方程中的自变量和因变量,它们均为试验观测数据的函数,而直线方程中的常数含有待求的含水层水动力弥散参数。因此,对试验观测数据进行适当变换,就可利用线性回归法分别计算两个直线方程的常数,从而可计算出含水层的有效孔隙率ne,纵向与横向弥散度DL与DT和地下水流速u。In this paper,the logarithmic transformation for the analytic solution on the space-time change of the tracer concentration during the test process of one dimensional steady flow field and two-dimensional unsteady hydrodynamic dispersion field with instantaneous injection is performed,and then two linear equations have been derived for two observation wells.The independent and dependent variables of two linear equations are all the functions of observation data of tracer test,and the linear constants include the hydrodynamic dispersion parameters of aquifer to be estimated.After a proper transformation of the test data is made,the linear constants can be computed by linear graphical method or linear regression method,and finally the values of such hydrodynamic dispersion parameters as the effective porosity ne,the longitudinal and transversal dispersive coefficients DLand DT of aquifer and groundwater flow velocity u can be calculated.

关 键 词：弥散试验 数据分析 直线解析法 参数确定 

分 类 号：X824[环境科学与工程—环境工程]