Advanced characterization and monitoring for improved wellhead protection in a fractured and porous dolostone bedrock aquifer

先进的表征和监测可改善裂隙和多孔白云岩基岩含水层的井口保护

• 批准号: 489241-2015
• 负责人: Parker, Beth
• 金额: $ 0.64万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=674610
• 关键词: Advanced; characterization; monitoring; improved; wellhead

In southern Ontario, the Silurian dolostone belt extending from the Niagara escarpment to Bruce County is a major bedrock aquifer supplying approximately 1 million people with drinking water in large (Guelph, Cambridge) and small (Fergus, Orangeville) communities. The City of Guelph wellfield comprises 23 municipal pumping wells that supply the city with potable water. Two of the wells are threatened by the occurrence of trichloroethene (TCE) a former industrial solvent and a human carcinogen. While the levels of TCE meet drinking water guidelines, it is not known how the concentrations of TCE will be affected by long term pumping, changing rates of pumping, seasonal variations in recharge, impacts from pumping of other wells in the area, and chemical processes within the aquifer. Understanding these interrelated impacts are critical to the City's long term management of secure and sustainable potable groundwater supplies. The proposed research will integrate high resolution field and laboratory characterization and monitoring techniques developed and refined by Dr Beth Parker at the University of Guelph and referred to as the DFN field approach and DFN numerical modelling techniques. The DFN field approach utilizes multiple lines of evidence including: rock coring, physical and chemical testing of the core, installation of borehole liners, hydraulic and hydrophysical testing of the open and lined borehole, installation of borehole liners, installation of multilevel groundwater monitoring systems, physical and chemical testing of the multilevel systems and modelling of the groundwater flow system and contaminant fate and transport. The novel aspects of this research include a "smart" prototype multilevel groundwater monitoring system, development of 3-D capture zone model and improved methodology for designing a sentry well monitoring program. The results of the research will generate more certainty about TCE contaminant behaviour in the Guelph aquifer system, provide groundwater communities with scientific-based, defensible policies for managing secure potable water supplies sustainably and improve the knowledge base and best practice methods of the Canadian groundwater industry.

在安大略省南部，从尼亚加拉悬崖延伸到布鲁斯县的志留纪多洛斯通皮带是一个主要的基岩含水层，在大（圭尔夫，剑桥）和小（弗格斯，奥兰治维尔）社区的大约100万人供水。圭尔夫市（Guelph Wellfield）城市包括23个市政抽水口，为这座城市提供饮用水。其中两个井受到三氯乙烯（TCE）的威胁，以前是工业溶剂和人类致癌物。 尽管TCE的水平符合饮用水指南，但尚不清楚TCE的浓度如何受到长期抽水，抽水速度的变化，补给的季节性变化，该地区其他井的泵送以及含水层中的化学过程的影响。了解这些相互关联的影响对于该市对安全且可持续的饮用地下水供应的长期管理至关重要。拟议的研究将整合圭尔夫大学贝丝·帕克博士开发和完善的高分辨率领域和实验室表征和监测技术，并被称为DFN现场方法和DFN数值建模技术。 DFN现场方法采用了多种证据，包括：岩石芯，核心的物理和化学测试，井眼衬里的安装，开放和衬里的钻孔的液压和水物理测试，井眼衬里的安装，安装多层地下水监测系统的多级地下水监测系统的安装，物理和化学测试，以及集体式系统和构造构造的构造和构造构造的构造。这项研究的新颖方面包括“智能”原型多级地下水监测系统，开发3-D捕获区模型以及改进的设计哨兵井监测程序的方法。这项研究的结果将对圭尔夫含水层系统中的TCE污染物行为产生更确定的确定性，为地下水社区提供基于科学的，可辩护的政策，以可持续管理安全的饮用水供应，并改善加拿大地下水行业的知识库和最佳实践方法。