Quality Systems: Optimization of Experimental Design for Groundwater Supply and Theory and Field Validation

这一建议的目的是对地下水供应和水质耦合系统中的实验设计问题进行理论工作，并通过在Borden含水层进行改进的水泵试验来评估所开发的设计方法，其他实地研究已经确定了该含水层的水力和质量传输参数。试验设计问题包括确定最佳试验条件以估计地下水系统中的水力和质量运移参数。实验条件确定了地下水抽水或补给的位置、时间和规模，含水层系统中观测井的位置，以及实验的采样频率和持续时间。基于成本、可靠性和可辨识性标准的实验条件是从管理和预测的角度设计的，目的是为参数估计提供最佳信息，从而将识别过程的不适性降至最低。实验室和实地任务预计将加深对Borden含水层对几种有机溶质的吸附特性的了解(已有广泛的迁移数据)，然后在Borden含水层实施一项改进的泵试验，在其中注入无机示踪剂和有机溶质。改装后的泵试验将设计为水力和质量输送参数的最佳估计。然后将通过将估计的参数与其他现场和实验室研究确定的参数进行比较来评估设计。这项研究的结果有望有助于确定水力和质量传输参数的可识别标准、与监测网络成本和可靠性相关的权衡，并为地下水监测网络的设计和运行提供基线信息。

The objective of this proposal are to conduct theoretical work on the experimental design problem in coupled groundwater supply and water quality systems, and to evaluate the developed design methodology by conducting modified pump tests in the Borden aquifer, for which the hydraulic and mass transport parameters have already been determined by other field studies. The experimental design problem includes the determination of the optimal experimental conditions for estimation of the hydraulic and mass transport parameters in groundwater systems. The experimental conditions define the location, timing and magnitude of groundwater pumping or recharge, the location of observation wells in the aquifer system, and the sampling frequency and duration of the experiment. The experimental conditions, which are based on cost, reliability, and identifiability criteria, are designed, from a management and prediction perspective, to provide optimal information for parameter estimation, and as a result, minimize the ill- posedness of the identification process. The laboratory and field tasks are expected to refine understanding of the sorptive characteristics of the Borden aquifer for several organic solutes (for which extensive transport data are already available), and then implement a modified pump test in the Borden aquifer in which inorganic tracers and the organic solutes are injected. The modified pump test will be designed for optimal estimation of the hydraulic and mass transport parameters. The design will then be evaluated by comparing the estimated parameters to those determined by other field and laboratory studies. Results of this research are expected to be useful in determining identifiability criteria for hydraulic and mass transport parameters, the trade-offs associated with monitoring network costs and reliability, and provide baseline information for the design and operation of groundwater monitoring networks.