Tracing environmental forcing on urban groundwater regime for improved, inclusive and adaptative resources modelling

城市化是21世纪最重要的趋势之一，影响着全球经济发展、能源消耗、自然资源利用和人类福祉。到2050年，世界人口的70%，约64亿人，预计将生活在城镇和城市，几乎是目前城市人口的两倍，用水需求将增加十倍。人口对地下水资源的压力日益增加，危及到世界各地淡水资源的数量、质量和分布。如果没有适当的规划和适应，数亿人将因城市增长而面临缺水的风险。人们对城市发展对地下水流动状况的影响知之甚少。我们的研究阐述了专门用于城市地下水调查的方法和城市地下水资源管理建模的新概念。这将通过三个步骤来实现：1 .探索城市地下水更新的类型。水循环的同位素和地球化学示踪剂是研究城市水循环的有力工具。在这里，我们有条不紊地实施水同位素调查，将信号反卷积为综合可测量的流量单元，以准确量化城市地下水更新。创新追踪方法量化城市资源可持续性。通过探索人为来源的分子（如咖啡因）在降解和运输过程中的同位素效应，我们将揭示与地下水资源的废水污染有关的过程。3 .设计城市水资源保护和管理新工具。对城市地下水动态和污染的了解使我们有机会更好地面对这些问题，并创建一个基于指数的工具来评估城市环境中天然地下水对污染物污染的脆弱性，从而保护未来的资源。我的“发现”研究项目整合了城市含水层的物理观测、数据采集、解释和模型开发，并促进了城市水循环管理和利用的长期规划。HQP将接受培训，以建立和传播创新的现场诊断方法，并转让在城市环境中可持续地预测和管理长期淡水资源的方法。它们将有助于提高决策者和利益相关者对长期规划中城市水管理问题的认识。这些综合进步将满足在水资源消耗和管理方面日益增长的社会需求。我们的资产支持，高质量的学术和专业课程将产生直接的社会经济影响，从当地（流域组织，quacimac地方当局）到国际规模。将培养3名博士、2名硕士、5名理学士，并与国内外研究机构密切合作。

Urbanization is one of the most significant trends of the 21st century, affecting global economic development, energy consumption, natural resource use, and human well-being. By 2050, 70% of the world's population, some 6.4 billion people, are expected to live in towns and cities, almost doubling the current urban population and increasing water demand tenfold. The increasing demographic pressure on groundwater resources endangers the quantity, quality, and distribution of freshwater resources around the world. Without appropriate planning and adaptation, hundreds of millions of people are at risk for water shortages as a result of urban growth. Little is known about the impacts of urban development on the groundwater flow regime. Our research elaborates methodologies dedicated to urban groundwater investigation and new concepts for modeling of urban groundwater resources management. This will be achieved in three steps, by: 1-Exploring the typology of urban groundwater renewal. Isotopes and geochemical tracers of the hydrological cycle are compelling tools to investigate the urban water cycle. Here, we methodically implement water isotope investigations to deconvolute signals into comprehensive and measurable flow units to accurately quantify urban groundwater renewal. 2-Innovating tracer methodologies to quantify urban resource sustainability. By exploring isotopic effects during the degradation and transport of molecules of anthropogenic origin (e.g., caffeine), we will unravel processes related to waste water contamination of ground water resources. 3-Designing new tools for urban water protection and management. Understanding of urban groundwater dynamics and contamination offers us the opportunity to better face these problems and create an index-based tool to assess natural groundwater vulnerability to contaminant pollution in urban settings and thereby protect future resources. My Discovery research program integrates physical observations, data acquisition, interpretation, and model development for urban aquifers, and fosters the long-term planning of urban water cycle management and use. HQP will be trained to establish and disseminate innovative on-site diagnostic methods, and to transfer methods for predicting and managing long-term freshwater resources sustainably in urban environments. They will contribute to raising decision maker and stakeholder awareness of urban water management issues for long-term planning. These combined advances will respond to growing societal needs in terms of water resource consumption and management. Our asset-backed, high-quality academic and professional programs will have immediate socioeconomic impacts from local (watershed organizations, Québec local authorities) to international scales. High-level training will be offered to 3 PhD, 2 MSc, and 5 BSc, with close collaborations with national and international research institutions.