A semi-analytical solution for transient radial flow in an unconfined-leaky-confined aquifer system
  • 【摘要】

    A new mathematieal model describing the transient drawdown response in an unCOnfined-1eaky-COnfined aquifer(ULCA)system pumped at a COnstant-flow rate is developed.The aquitard of a finite thiclne... 展开>>A new mathematieal model describing the transient drawdown response in an unCOnfined-1eaky-COnfined aquifer(ULCA)system pumped at a COnstant-flow rate is developed.The aquitard of a finite thiclness with storage lies below a pumped unCOnfined aquifer and above a COnfined aquifer.The Laplace-domain solutions for the drawdown distributions in the unCOnfined aquifer,aquitard,and COnfined aquifer are found by applying the double Laplace-Hankel transforms.The present solution of the drawdown in the unCOnfined aquifer can reduce to the Neuman solution(1972) for the case of a non-leaky unCOnfmea aquifer where the hydraulic COnductivity of the aquitard is very small and thereby negligible.The time-domain solutions are obtained numerically by the modified Crump algorithm.The present solutions are used to investigate the cfleets of the aquifer properties on the drawdown distributions in an ULCA system.The results show that the drawdowns in the unCOnfined aquifer and the aquitard are significantly influenced by the aquitard properties. 收起<<

  • 【作者】

    YANG Shawyang  YehHundder  Vitaly A.Zlotnik 

  • 【作者单位】

    Department

  • 【会议名称】

    第四届海峡两岸土壤及地下水污染与整治研讨会

  • 【会议时间】

    2008-08-03

  • 【会议地点】

    西安

  • 【主办单位】

    中国地质学会   中国地质大学

  • 【语种】

    eng

  • 【关键词】

    渗漏自由含水层  径向水流  Hankel变换  半解析解