Numerical modelling of complex hydrogeosystems

复杂水文地质系统的数值模拟

• 批准号: RGPIN-2019-05188
• 负责人: Molson, John
• 金额: $ 2.62万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=715409
• 关键词: Numerical; modelling; complex; hydrogeosystems

My 2018 NSERC Discovery Grant proposal focuses on development and application of numerical simulation models to gain insight into complex hydrogeosystems, within the context of protection and sustainable development of groundwater resources. The objectives are based on three complimentary research themes: 1. Advancing our understanding of cryo-hydrogeological systems in the context of climate change, specifically regarding the future potential of groundwater resources in the north, 2. Developing new insights into the behavior and remediation of organic contaminants, and 3. Improving the protection of groundwater resources under complexity and uncertainty. These themes are linked through development, testing and application of advanced physically-based coupled-process numerical models for simulating groundwater flow and transport of mass and thermal energy. A quantitative approach will be adopted for each theme. New methodologies will be tested and models calibrated using high-resolution field data obtained using state-of-the-art monitoring techniques at a variety of field sites. First, impacts of climate change and permafrost thaw on groundwater quality and on behavior of mine drainage in northern climates will be investigated by developing a numerical model which integrates groundwater flow and multi-component reactive mass transport with conductive and convective heat transport in cold- and permafrost-impacted environments. Model applications, including at a well-instrumented catchment in Nunavik, QC, and to documented cases of mine drainage, will address the potential for developing groundwater resources in northern environments, and for protecting these resources from contamination. Second, the efficiency of aggressive treatment-train remediation strategies for aquifers contaminated by petroleum hydrocarbons will be investigated under complex hydrogeological conditions. By simulating multi-component reactive systems while tracking the signatures of the stable isotopes of C, H, O and S at instrumented field sites, new insights for optimizing remediation schemes will be obtained. Finally, methodologies for accounting for complexity and uncertainty in defining capture zones for water supply wells in complex porous and fractured porous media will be developed and compared. Various degrees of complexity for defining water well capture zones and protection areas at documented field sites will be tested and compared. Uncertainty will be quantitatively evaluated and strategies will be proposed for communicating this uncertainty to end-users and for incorporating uncertainty in the decision-making process. The research plan is targeted to respond to the needs of society including training of highly qualified personnel (2 PhD, 2 MSc and 2 BSc students), and transferring the knowledge gained and tools developed, to stakeholders, end-users and decision-makers at the regional, municipal and watershed management levels.

我的2018年NSERC发现赠款提案侧重于数值模拟模型的开发和应用，以在地下水资源保护和可持续发展的背景下深入了解复杂的水文地质系统。 这些目标基于三个相辅相成的研究主题： 1.在气候变化背景下增进我们对低温水文地质系统的了解，特别是关于北方地下水资源的未来潜力， 2.发展对有机污染物的行为和补救的新见解，以及 3.加强复杂不确定性条件下的地下水资源保护。 通过开发、测试和应用先进的物理耦合过程数值模型来模拟地下水流动以及质量和热能的传输，将这些主题联系在一起。每个主题都将采用量化的方法。将测试新的方法，并利用在各外地地点使用最先进的监测技术获得的高分辨率实地数据对模型进行校准。 首先，将研究气候变化和多年冻土融化对地下水水质和北方气候中矿山排水行为的影响，方法是开发一个数值模型，该模型将地下水流动和多组分反应性物质传输与传导和对流热传输相结合，在受寒冷和多年冻土影响的环境中。示范应用，包括在昆士兰州努纳维克的一个仪器齐全的集水区，以及有记录的矿山排水案例，将探讨在北部环境中开发地下水资源的潜力，并保护这些资源免受污染。 第二，将研究在复杂的水文地质条件下，对受石油碳氢化合物污染的含水层采取积极的处理-列车修复策略的效率。通过模拟多组分反应体系，同时跟踪C、H、O和S稳定同位素在现场的特征，将为优化修复方案提供新的见解。 最后，将开发和比较在复杂多孔和裂隙多孔介质中确定供水井捕获区域的复杂性和不确定性的计算方法。将测试和比较在记录在案的实地地点界定水井捕获区和保护区的不同程度的复杂性。将对不确定性进行量化评估，并提出将这种不确定性传达给最终用户和将不确定性纳入决策过程的战略。 研究计划的目标是满足社会需求，包括培训高素质人员(2名博士、2名硕士和2名理科学生)，并将所获得的知识和开发的工具转让给区域、市政和流域管理各级的利益攸关方、最终用户和决策者。