稳定井流直线图解法确定含水层参数  

Straight-line graphical method to determine aquifer parameters for steady flow to well

作　　者：张力春[1] 肖长来[1] 梁秀娟[1] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130026

出　　处：《世界地质》2006年第1期67-70,共4页World Geology

基　　金：中国地质调查局项目(2003104001);吉林省科技攻关项目(20020401);吉林大学创新基金项目(450011022249)

摘　　要：对于潜水井流,利用Dupuit公式计算的参数往往相差很大,难以直接选用。对Dupuit公式进行线性化,建立降深(s)与距离(r)的s-lnr直线关系,利用直线斜率、直线在x轴上的截距,可以直接求得唯一的渗透系数K和影响半径R。利用松花江河谷的承压水井抽水试验资料和洮儿河扇形地27个潜水抽水井及其观测孔的抽水试验资料,应用直线图解法分析计算,得到唯一的含水层参数T、K和R。将计算结果与直接利用Dupuit公式所计算的结果相比较,前者的求参效果较好。The parameters calculated by the Dupuit equation methods for unconfined aquifer are quite different from each other and difficult to select directly. Dupuit equation is treated with iinearity, and the straight relationship s-lnr between drawdown s and distance r is set up. The unique hydraulic conductivity K and influence radium R can be gotten by using the slope and the intercept at the axis x. The pumping test data from the confined wells in the Songhua River valley plain and 27 unconfined wells and observation wells in the Tao＇er River fan are analyzed. The aquifer parameters are calculated by the straight-line graphic method compared with the Dupuit equation method, the results reflect the hydrogeological conditions better in the parameters calculation in the studied areas.

关 键 词：直线图解法 完整井稳定流 渗透系数 

分 类 号：P641.132[天文地球—地质矿产勘探]