Hydrologic responses to concurrent changes in climate, land use and water use

水安全对社会、政治和经济稳定以及环境可持续性至关重要。土地利用变化、水管理和自然资源开采等人为活动影响环境系统，包括水文循环。了解它们之间的相互作用和反馈对于确保安全可靠的供水是必要的。对同时发生的人为活动的水文反应特别重要，因为协同效应可以放大或减轻关键问题，包括水的可获得性以及污染物的释放和转移。尽管最近的研究强调了预测水文条件的综合方法的重要性，但我们对水文循环和人类活动之间的复杂关系的理解仍然不完整。我的研究计划的长期目标是提高我们对人类活动和自然环境系统之间的相互作用和反馈的理解，重点是对陆地水文循环的影响。我们将以开发有效和可获得的建模方法为重点，开发新的方法来确定和量化同时人为驱动的过程对地表水和地下水系统的影响。具体地说，我们将区分和量化气候、土地利用和水利用对河流径流变化的贡献，重点是地下水向河流排放的变化。我们还将评估地下水位对气候变化的反应，以及对同样气候变化导致的地下水使用变化的反应。对于这两种应用，我们将通过创新地集成全球可用的数据集和计算上省的建模方法来提高这些方法相对于现有方法的可访问性。最后，我们将开发新的方法来模拟水管理战略如何影响推动水资源数量和质量的过程，寻求改进决策工具，以减轻对水资源的负面影响。拟议的研究通过模型开发、数据集成和知识转移朝着计划目标迈进，为进一步提高我们对人类活动与环境系统之间的反馈和相互作用的理解提供基础，并指导资源管理以确保水安全和环境的可持续性。

Water security is critical to social, political and economic stability, and environmental sustainability. Anthropogenic activities, such as land use change, water management, and natural resource extraction, impact environmental systems, including the hydrologic cycle. Understanding the interactions and feedbacks between them is necessary to ensure a safe and reliable water supply. The hydrologic responses to concurrent anthropogenic activities are particularly important as the synergistic effects can magnify or mitigate critical issues, including water availability and contaminant release and transport. Although recent research has highlighted the importance of an integrated approach for predicting hydrologic conditions, our understanding of the complex relationships between the hydrologic cycle and human activities remains incomplete. The long-term objective of my research program is to improve our understanding of the interactions and feedbacks between anthropogenic activities and natural environmental systems, focusing on implications for the terrestrial hydrologic cycle. With an emphasis on the development of effective and accessible modeling approaches, we will develop novel methods of identifying and quantifying the impacts of concurrent anthropogenic-driven processes on both the surface and groundwater systems. Specifically, we will differentiate between, and quantify, the contributions of climate, land use, and water use to changes in streamflow, with an emphasis on changes in groundwater discharge to streams. We will also assess how groundwater levels respond to changes in climate, and to changes in groundwater use that result from the same changes in climate. For both of these applications, we will improve the accessibility of these methods over existing approaches through innovative integration of globally-available datasets and computationally-frugal modeling approaches. Finally, we will develop new approaches to simulate how water management strategies affect processes driving both water quantity and quality, seeking to improve decision-making tools to mitigate negative impacts on water resources. The proposed research moves towards the program goal through model development, data integration, and knowledge transfer, providing a foundation to further improve our understanding of the feedbacks and interactions between anthropogenic activities and environmental systems, and guide resource management to ensure water security and environmental sustainability.