Semi-analytical solution to pumping test data with barrier, wellbore storage, and partial penetration effects
Semi-analytical solution to pumping test data with barrier, wellbore storage, and partial penetration effects
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具有屏障、井筒储存和部分渗透效应的泵送测试数据的半解析解
DOI：
10.1016/j.enggeo.2017.05.011
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发表时间：
2017-08
影响因子：
7.4
通讯作者：
Hino T
中科院分区：
文献类型：
--
作者：
Wu YX;Shen SL;Cheng WC;Hino T
传统的库珀-雅各布方法在半透水挡土墙中利用抽水试验资料确定含水层参数存在一定的困难。许多其他现场特定的因素，如部分穿透井的影响和大直径的井，不容易在理论井公式中考虑在内。受障碍、井筒储存和部分渗透率井影响的半对数压降时间曲线可分为四个不同的下降阶段：i)阶段I，压降不受障碍的影响，ii)阶段II，压降受障碍的显著影响，III)阶段III，下降时间曲线与绿地条件推导的曲线平行，以及IV)阶段IV，压降变为常量。为了处理降水的四个不同阶段，提出了一种利用第III阶段后期降水渐近线的斜率来确定透过率的半解析方法。水平截距是由第II阶段的后期降深渐近线延伸而来的，用于确定存储系数。用所提出的半解析法对某工程实例的抽水试验数据进行了分析，并与数值模拟结果进行了比较。将分析结果与数值模拟结果进行了比较，结果令人满意。
There exist some difficulties in determining aquifer parameters based on pumping test data within a partially penetrated retaining walls using traditional Cooper-Jacob method. Many other site-specific factors, such as the effect of partially penetrating well and the large diameter of the wells, cannot easily be accommodated in theoretical well formulae. The semi-log drawdown-time curves affected by the effects of barrier, wellbore storage, and partial penetration well can be characterised by four distinct stages of drawdown: i) Stage I, drawdown is unaffected by the barrier, ii) Stage II, drawdown is significantly influenced by the barrier, iii) Stage III, the drawdown-time curve runs parallel to that deduced from greenfield conditions, and iv) Stage IV, the drawdown becomes a constant value. To handle the four distinct stages of drawdown, a semi-analytical method using the slope of the late-time drawdown asymptote of Stage III for determining the transmissivity is proposed. The horizontal intercept, resulting from an extension of the late-time drawdown asymptote from Stage II, is used for determining the storage coefficient. Pumping test data from a case history are analysed using the proposed semi-analytical method, and the results obtained are compared with those deduced from the numerical simulation. The comparison between the analytical results and those obtained from the numerical simulation appeared satisfactory.
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影响因子：
2.4
作者：
ko-fei Liu
通讯作者：
ko-fei Liu
影响因子：
5.4
作者：
I. S. Papadopulos;H. H. Cooper-H.
通讯作者：
I. S. Papadopulos;H. H. Cooper-H.
DOI：
10.1201/9781498710756
发表时间：
1991-05
期刊：
--
影响因子：
--
作者：
J. Istok;Karen J. Dawson
通讯作者：
J. Istok;Karen J. Dawson
影响因子：
7.4
作者：
Jordi Font-Capó;E. Pujades;E. Vázquez-Suñé;J. Carrera;V. Velasco;Daniel Montfort
通讯作者：
Jordi Font-Capó;E. Pujades;E. Vázquez-Suñé;J. Carrera;V. Velasco;Daniel Montfort
影响因子：
7.4
作者：
D. Roy;K. Robinson
通讯作者：
D. Roy;K. Robinson