Improving permeability tests, pumping tests and predictive methods

近年来，申请人发展或改进了几种解释渗透试验、抽水试验的方法，以及预测土壤水力性质的可靠方法。2002年至2007年共发表期刊论文40篇。有两项ASTM标准被证明是基于错误的理论：一项没有更新；另一项目前正在应ASTM的要求由申请人重写。另外两个标准将很快被修改，以包括(应ASTM的要求)由申请人开发的某些质量控制方法。这项研究工作将通过调查原始路径继续进行，这些路径目前在性质上是理论上的，但很快就会有实际应用。长期目标是提高确定地下水参数方法的可靠性。一名博士生(D1)将在其他抽油井的影响下学习抽水测试，这使得瞬变解释方法变得复杂。两名硕士研究生(M1、M2)将研究在无承压和半承压含水层抽水试验中寻找最佳饱和-非饱和水力函数的反问题。另一名博士生(D2)将继续研究孔隙压力波如何传播，以及复杂的数学发展。一名硕士研究生(M3)将学习跨地下水位监测井的渗透性测试。一名硕士研究生(M4)将研究粘土层的滞后时间(其受上下边界条件的影响)如何影响当地的段塞测试和脉冲测试数据。一名博士生(D3)将开发新的方法来确定无承压含水层中水井周围的保护区，具有净渗透和区域梯度的现实条件。一名硕士研究生(M5)将尝试建立一种现实的方法，根据级配和孔隙度等物理性质预测毛细管保留曲线。一名博士生(D4)将建立一个等同于Kozeny-Carman方程的公式，但要适当考虑各向异性和由于压实而引起的内部结构的修改。因此，拟培训9名地下水工程专业学生(4名博士和5名硕士)。

In recent years the applicant has developed or improved several methods to interpret permeability tests, pumping tests, and reliable methods to predict the hydraulic properties of soils. Forty journal papers were published from 2002 to 2007. Two ASTM standards were proven to be based on wrong theories: one was not renewed; the other is presently being rewritten by the applicant at the request of ASTM. Two other standards will be modified soon to include (at ASTM's request) certain quality control methods developed by the applicant. This research work will be continued by investigating original paths that are presently theoretical in nature, but will rapidly have practical applications. The long term objective is to improve the reliability of methods to determine groundwater parameters. One PhD student (D1) will study pumping tests under the influence of other pumping wells, which complicates transient interpretation methods. Two master's students (M1, M2) will investigate the inverse problem of finding the best saturated-unsaturated hydraulic functions for pumping tests in unconfined and semi-confined aquifers. Another PhD student (D2) will continue to study how pore pressure waves propagate, with complex mathematical developments. One master's student (M3) will study permeability tests in monitoring wells spanning the water table. One master's student (M4) will examine how the lag time of a clay layer (whcih is influenced by upper and lower boundary conditions) may influence the local data of slug tests and pulse tests. One PhD student (D3) will develop new methods to define protection areas around wells in unconfined aquifers, with realistic conditions for net infiltration and regional gradients. One master's student (M5) will try to establish a realistic method to predict the capillary retention curve from physical properties such as gradation and porosity. One PhD student (D4) will develop an equivalent to the Kozeny-Carman equation but with due consideration to anisotropy and modifications of the internal structure due to compaction. It is therefore proposed to train 9 students (4 PhDs and 5 masters) in groundwater engineering.