Improving the quality of pumping tests, permeability tests, and predictive methods

提高泵送测试、渗透性测试和预测方法的质量

• 批准号: 109540-2013
• 负责人: Chapuis, Robert
• 金额: $ 2.04万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636218
• 关键词: Improving; quality; pumping; tests; permeability

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.

近年来，申请人已经开发或改进了几种方法来解释渗透试验，泵送试验，以及可靠的方法来预测土壤的水力特性。2006 - 2012年共发表期刊论文48篇。因此，申请人一直在积极提高加拿大和美国的标准。这项研究工作将继续进行，为经常出现的问题制定更好的解决办法。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。该基金将用于培养地下水工程方面的4名博士（D1至D4）、6名硕士（M1至M6）和10名本科生及博士后。对于抽水试验，D1将解决干扰井的问题，D2将更好地确定无承压含水层井周围的保护区域。评估示踪剂注射方法如何影响示踪剂测试结果将由M1进行研究。M2和M3将解决无承压和半承压含水层抽水试验压降数据标定的非线性反演问题。D3将解决特殊新测试的所有实际问题，包括从井筛管或封隔器之间的空间开始的人造压力波的径向传播。对于渗透率测试，即使申请人和他的研究团队已经解决了很多问题，仍然有一些悬而未决的问题。M4将研究监测井的情况，这些井具有跨越地下水位的筛管，具有复杂的瞬态非饱和现象。M5将研究粘土层的长时滞如何影响粘土中脉冲试验的数据。M6将研究如何在更短的时间内获得比常规设备更准确的毛细管保留曲线。最后，D4将从微观层面出发，建立考虑各向异性和压实过程中内部结构变化的定向渗透率预测方程。