Improving the quality of pumping tests, permeability 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。2006年至2012年共发表期刊论文48篇。因此，申请者一直在积极提高加拿大和美国的标准。这项研究工作将通过为反复出现的问题制定更好的解决方案来继续进行。长期目标是提高现场和实验室方法的可靠性，以确定地下水和环境研究所需的参数，并降低成本。这笔补助金将用于培训地下水工程方面的4名博士(D1至D4)、6名硕士(M1至M6)和10名本科生以及博士后研究员。在抽水试验方面，第1点将解决干扰井的问题，第2点将解决更好地界定无承压含水层井周围保护区的问题。M1将检查如何评估示踪剂注入方法对示踪剂测试结果的影响。M2和M3将解决在无承压和半承压含水层中校准抽水试验降落数据的非线性反问题。D3将解决一种特殊的新测试的所有实际方面，涉及从井网或封隔器之间的空间开始的人造压力波的径向传播。对于渗透性测试，即使申请者和他的研究团队已经解决了许多问题，仍有几个问题有待解决。M4将研究监测井的情况，这些井具有跨越地下水位的屏幕，具有复杂的瞬时非饱和现象。M5将研究粘土层的长时间滞后如何影响粘土中的脉冲测试数据。M6将研究如何在更短的时间内获得比通常设备获得的毛细管保留曲线更准确的毛细管保留曲线。最后，D4将从微观层面出发，在充分考虑压实过程中各向异性和内部结构变化的情况下，建立方向渗透率预测方程。

In recent years the applicant has developed or improved several methods to interpret permeability tests, pumping tests, and also reliable methods to predict the hydraulic properties of soils. Forty eight journal papers were published from 2006 to 2012. As a result, the applicant has been active in improving Canadian and US standards. This research work will be continued by developing better solutions to recurrent problems. The long term objective is to improve the reliability of field and laboratory methods to determine parameters that are needed for groundwater and environmental studies, and also decrease the costs. The Grant will be used to train 4 PhD (D1 to D4), 6 MSc (M1 to M6) and 10 undergraduate students, plus postdoctoral fellows, in groundwater engineering. For pumping tests, problems of interfering wells will be tackled by D1, and those of better defining the protection areas around wells in unconfined aquifers by D2. Evaluating how the tracer injection method influences the tracer test results will be examined by M1. The non-linear inverse problem of calibrating drawdown data of pumping tests in unconfined and semi-confined aquifers will be tackled by M2 and M3. Solving all practical aspects of a special new test, involving the radial propagation of a man-made pressure wave starting from a well screen, or from the space between packers, will be tackled by D3. For permeability tests, even if the applicant and his research team have already solved many problems, there are still a few pending ones. M4 will study the case of monitoring wells having screens spanning the water table, with complex transient unsaturated phenomena. M5 will study how the long time-lag of a clay layer influences the data of pulse tests in clay. M6 will investigate how to obtain a capillary retention curve more correct than those obtained with usual equipment, and in a shorter time. Finally, D4 will start from the microscopic level to establish an equation predicting directional permeability with due consideration to anisotropy and internal structure modification during compaction.