阶梯流量抽水试验数据确定含水层参数的实例探讨  

Example Discussion of Aquifer Parameters Calculation Based on Step-head Flow Pumping Test

作　　者：李菲[1] 蒋名亮 郭建青[1] 张洪波[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054

出　　处：《水电能源科学》2016年第1期66-68,72,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51009009;51379014);教育部地下水文与生态效应重点实验室开放基金(2013G1502044)

摘　　要：为了提高利用阶梯流量抽水试验数据确定含水层参数的精度,基于Jacob直线公式,结合实例分析计算了不同阶梯数目的抽水试验数据,探讨了不同算法的计算结果及差异性,并进行了适用性和灵敏度分析。结果表明,在考虑Jacob公式的适用条件后,在单阶梯和多阶梯算法情况下,含水层导水系数和弹性释水系数的计算结果精度均明显得到提高,但计算结果均存在一定的差异,其中多阶梯算法计算结果具有离散程度低、残差较小的优点,但对随机误差较为敏感,在实际工作中应予以注意。To improve the precision of the aquifer parameters＇ calculation deduced from step pumping flow,the original data of different numbers of steps were calculated on the basis of Jacob＇s linear formula.The results and discrepancy under different algorithms were discussed as well as analyzed the applicability and the sensitivity.The results show that after modifying the original data to meet Jacob＇s applicability condition,the precision of both the single step algorithm and the accumulative steps algorithm is obviously raised.But the discrepancy between the two algorithms exists to some extent.The accumulative steps algorithm has the advantage of lower dispersion degree and smaller residual,but it is slightly sensitive towards the random error,which should be paid more attention to in the practical work.

关 键 词：阶梯流量 导水系数 释水系数 直线图解法 

分 类 号：P641.2[天文地球—地质矿产勘探]