Dynamics and management of riverine freshwater lenses

河流淡水透镜体的动力学和管理

• 批准号: LP140100317
• 负责人: Prof Adrian Werner
• 金额: $ 20.73万
• 依托单位: Flinders University
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2015
• 资助国家: 澳大利亚
• 起止时间: 2015-05-01 至 2019-07-05
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP140100317
• 关键词: Dynamics; management; riverine; freshwater; lenses

Rivers are the main source of freshwater for many ecosystems in semi-arid zones. River water may seep into the floodplain aquifer, providing an accessible store of low-salinity water within freshwater lenses. The project aims to investigate lens dynamics using numerical groundwater models supported by extensive field data from the lower River Murray, where freshwater lenses are declining. The project aims to model lens extent, growth and decline in response to natural variations in climate and to changes in land use, river regulation and groundwater pumping. Project results intend to evaluate management options to promote freshwater lenses, with the aim of improving river salinity and floodplain vegetation health.

河流是半干旱区许多生态系统的主要淡水来源。河水可能渗入泛滥平原的含水层，在淡水透镜体中提供了可获取的低盐度水储存。该项目旨在利用数值地下水模型来研究透镜体动力学，该模型得到了来自默里河下游的大量现场数据的支持，那里的淡水透镜体正在减少。该项目旨在模拟透镜的范围、增长和下降，以应对气候的自然变化以及土地利用、河流管理和地下水开采的变化。项目结果打算评价促进淡水透镜的管理办法，目的是改善河流盐度和洪泛区植被健康。