Unsaturated zone functioning in a semi-arid flash flood driven climate

半干旱山洪驱动气候下的非饱和带

• 批准号: LP210300691
• 负责人: Dr Grzegorz Skrzypek
• 金额: $ 54.7万
• 依托单位: The University of Western Australia
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2022
• 资助国家: 澳大利亚
• 起止时间: 2022-11-30 至 2026-11-29
• 项目状态: 未结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP210300691
• 关键词: Unsaturated; zone; functioning; semi; arid

Groundwater is the only perennial water source in arid and semiarid zones, which encompass 1/3 of the global landmass and 70 % of Australia. We still do not fully understand how the unsaturated zone contributes to groundwater recharge in semi-arid zone floodplains. We will study the dynamics of soil moisture, and its contribution to groundwater recharge respective to hydrological regimes and weather patterns. We will measure direct responses to flood events using loggers and compare them to indirect measurements inferred from hydrochemical and isotope tracer models to better understand recharge patterns, evaporative losses, and interactions between surface runoff, floodplains, and aquifers at different positions in the landscape.

地下水是干旱和半干旱地区唯一的常年水源，占全球陆地面积的1/3和澳大利亚的70%。我们仍然不完全了解非饱和区如何有助于半干旱区洪泛区地下水补给。我们将研究土壤水分的动态，及其对地下水补给的贡献，分别水文制度和天气模式。我们将使用记录仪测量洪水事件的直接响应，并将其与从水化学和同位素示踪模型推断的间接测量结果进行比较，以更好地了解补给模式，蒸发损失以及地表径流，洪泛区和含水层之间的相互作用。