More precise mapping of subsurface heterogeneity through hydraulic tomography analysis of municipal pumping and water level records

通过市政抽水和水位记录的水力层析成像分析，更精确地绘制地下非均质性图

• 批准号: 506991-2016
• 负责人: Illman, WalterArthur
• 金额: $ 1.89万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=654233
• 关键词: More; precise; mapping; subsurface; heterogeneity

Hydraulic tomography (HT) has emerged as a new field technology to image the subsurface heterogeneity for both hydraulic conductivity (K) and specific storage (Ss). In particular, HT involves conducting sequential pumping tests over a well network and jointly analyzing the data set to obtain a consistent interpretation of K and Ss distributions. Prior research has shown that HT yields reliable results through pilot studies at small-scale field sites. However, research is critically needed to investigate whether HT can yield accurate parameters from existing water level records due to pumping/injection operations at municipal wellfields. At such sites, distances among wells are large and data are sparse making the application of HT technology new and challenging.**The overall goal of this project is to examine the feasibility of utilizing existing data from a municipal wellfield to map the K and Ss of various aquifer/aquitard units of the Waterloo Moraine in partnership with the Region of Waterloo and Aquanty, Inc. Specific objectives are: 1) to demonstrate that HT is superior to conventional methods for estimating the spatial distribution of K and Ss; 2) to investigate whether HT results can yield finer scale details to heterogeneity through the integration of geological data; 3) to develop guidance for HT analysis of municipal well data; 4) to explore the utility of HT technology in the Canadian municipal water and water bottling markets; and 5) to train highly qualified personnel (HQP).**The main benefit from this project that is expected to accrue to the Canadian industry is the development of a new method to delineate subsurface heterogeneity in hydraulic parameters through the innovative analysis of existing water level records from municipal wellfields that are typically not analyzed. If the research is successful, aquifer parameters could be characterized without the conduct of dedicated pumping tests which would result in substantial cost savings. In addition, this research should lead to improved reliability of groundwater flow and transport models, ultimately leading to better decision making.

水力层析成像 (HT) 已成为一种新的现场技术，可对水力传导率 (K) 和比存储 (Ss) 的地下非均质性进行成像。特别是，HT 涉及通过井网进行顺序泵送测试并联合分析数据集以获得 K 和 Ss 分布的一致解释。先前的研究表明，HT 通过在小规模现场进行的试点研究可以产生可靠的结果。然而，迫切需要进行研究来调查由于市政井场的抽水/注入作业，HT 是否可以从现有水位记录中产生准确的参数。在这些地点，井之间的距离很大，数据稀疏，使得 HT 技术的应用变得新颖且具有挑战性。**该项目的总体目标是与滑铁卢地区和 Aquanty, Inc 合作，研究利用市政井场的现有数据来绘制滑铁卢冰碛各个含水层/弱透水层单元的 K 和 Ss 的可行性。具体目标是：1) 证明 HT 优于 估计 K 和 Ss 空间分布的传统方法； 2）研究HT结果是否可以通过地质数据的整合产生更精细的非均质性尺度细节； 3）制定市政井数据HT分析指南； 4) 探索HT技术在加拿大市政用水和水瓶装市场的应用； 5) 培训高素质人才 (HQP)。**该项目预计将为加拿大工业带来的主要好处是开发一种新方法，通过对通常不进行分析的市政井场的现有水位记录进行创新分析来描述水力参数的地下非均质性。如果研究成功，无需进行专门的抽水测试即可表征含水层参数，这将节省大量成本。此外，这项研究应该会提高地下水流和传输模型的可靠性，最终导致更好的决策。