標題: Radial groundwater flow to a finite diameter well in a leaky confined aquifer with a finite-thickness skin
作者: Yang, Shaw-Yang
Yeh, Hund-Der
環境工程研究所
Institute of Environmental Engineering
關鍵字: groundwater;skin effect;Laplace transforms;leaky confined aquifer;sensitivity analysis
公開日期: 15-十一月-2009
摘要: A mathematical model that describes the drawdown due to constant pumpage from a finite radius well in a two-zone leaky confined aquifer system is presented. The aquifer system is overlain by an aquitard and underlain by an impermeable formation. A skin zone of constant thickness exists around the wellbore. A general solution to a two-zone leaky confined aquifer system in Laplace domain is developed and inverted numerically to the time-domain solution using the modified Crump (1976) algorithm. The results show that the drawdown distribution is significantly influenced by the properties and thickness of the skin zone and aquitard. The sensitivity analyses of parameters of the aquifer and aquitard are performed to illustrate their effects on drawdowns in a two-zone leaky confined aquifer system. For the negative-skin case, the drawdown is very sensitive to the relative change in the formation transmissivity. For the positive-skin case, the drawdown is also sensitive to the relative changes in the skin thickness, and both the skin and formation transmissivities over the entire pumping period and the well radius and formation storage coefficient at early pumping time. Copyright (C) 2009 John Wiley & Sons, Ltd.
URI: http://dx.doi.org/10.1002/hyp.7449
http://hdl.handle.net/11536/6425
ISSN: 0885-6087
DOI: 10.1002/hyp.7449
期刊: HYDROLOGICAL PROCESSES
Volume: 23
Issue: 23
起始頁: 3382
結束頁: 3390
顯示於類別:期刊論文


文件中的檔案:

  1. 000271452600011.pdf