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: $ 5.9万
• 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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=755013
• 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发现拨款提案侧重于开发和应用数值模拟模型，以深入了解复杂的水文地质系统，在地下水资源的保护和可持续发展的背景下。目标是基于三个互补的研究主题：1。1 .在气候变化背景下提高我们对低温水文地质系统的认识，特别是关于北方地下水资源的未来潜力；2 .对有机污染物的行为和修复发展新的见解；提高复杂性和不确定性下地下水资源的保护。这些主题通过开发、测试和应用先进的基于物理的耦合过程数值模型来模拟地下水流动、质量和热能的输送。将对每个主题采用数量方法。将测试新的方法，并使用在各种现场使用最先进的监测技术获得的高分辨率现场数据校准模型。首先，研究了气候变化和多年冻土融化对北方气候下地下水质量和矿井排水行为的影响，建立了一个综合了寒冷和永久冻土影响环境下地下水流动、多组分反应性物质输运以及传导和对流热输运的数值模型。模型应用，包括在QC Nunavik的一个设备齐全的集水区，以及矿井排水的记录案例，将解决在北方环境中开发地下水资源的潜力，并保护这些资源免受污染。其次，在复杂的水文地质条件下，研究了石油烃污染含水层的积极治理训练修复策略的有效性。通过模拟多组分反应体系，同时跟踪仪器现场C、H、O和S稳定同位素的特征，将获得优化修复方案的新见解。最后，将开发和比较在复杂多孔和裂缝多孔介质中定义供水井捕获区的复杂性和不确定性的方法。将测试和比较在有文件记录的现场确定水井捕获区和保护区的不同复杂程度。将对不确定性进行定量评价，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策略。该研究计划的目标是响应社会的需求，包括培训高素质人才（2名博士，2名硕士和2名理学士学生），并将所获得的知识和开发的工具转移到区域，市政和流域管理层面的利益相关者，最终用户和决策者。