Potential Impacts of Prospective Climate Change on Groundwater Recharge in the Western United States

未来气候变化对美国西部地下水补给的潜在影响

• 批准号: 1328505
• 负责人: Thomas Meixner
• 金额: $ 1.9万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-05-01 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1328505&HistoricalAwards=false
• 关键词: Potential; Impacts; Prospective; Climate; Change

Groundwater withdrawals in the western US are a critical component of the water resources strategy for the region. Recharge estimation methods include water balance accounting, groundwater modeling, remote sensing, observational methods and environmental tracer analysis. This project will assemble a team of investigators to synthesize current understanding of recharge in the West and how it may respond to climate change in the coming decades. The synthesis will build on previous work that quantified major aquifer systems within the United States under the USGS-Regional-Aquifer-System-Analysis program. The synthesis will (1) draw upon geographically targeted process-based studies of recharge controls and their sensitivity to climatic forcing in various parts of the region; (2) take advantage of recently available dynamically downscaled climate-change projections; (3) meld process-exploring results from high-resolution water balance studies and modeling analyses. These approaches will be used to develop enhanced estimates of groundwater recharge (with estimated uncertainties) and a detailed list of research needs will be developed for more robust estimates of groundwater recharge across the region. This project is cooperative with the USGS John Wesley Powell Center Science Board. This project will significantly advance regional knowledge of the controls on groundwater recharge and the impact this has on regional water sustainability for the US southwest. By synthesizing the state of knowledge as well as the best methods of analysis and reanalysis, the project will define new methods (and better estimates) of regional scale groundwater recharge. The project will also significantly impact water resource and water management strategy for the southwest by providing an improved basis for long timescale analysis.

美国西部的地下水开采是该地区水资源战略的重要组成部分。补给估算方法包括水量平衡计算、地下水模拟、遥感、观测方法和环境示踪剂分析。 该项目将组建一个调查小组，综合目前对西方补给的理解，以及它在未来几十年如何应对气候变化。 综合将建立在以前的工作，量化的主要含水层系统在美国地质调查局区域含水层系统分析计划。 该综合报告将（1）利用对该区域不同地区的补给控制及其对气候强迫的敏感性进行的地理上有针对性的基于过程的研究;（2）利用最近可用的动态缩小尺度的气候变化预测;（3）将高分辨率水平衡研究和模拟分析的过程探索结果结合起来。 这些方法将用于对地下水补给量进行更准确的估计（估计不确定性），并将编制一份详细的研究需求清单，以便对整个区域的地下水补给量进行更可靠的估计。 该项目是与美国地质勘探局约翰韦斯利鲍威尔中心科学委员会合作。 该项目将大大提高对地下水补给控制的区域知识，以及这对美国西南部区域水可持续性的影响。 通过综合现有知识以及最佳分析和再分析方法，该项目将确定区域规模地下水补给的新方法（和更好的估计）。 该项目还将通过为长期分析提供更好的基础，对西南部的水资源和水管理战略产生重大影响。