Impact of rift tectonics on the groundwater system of Awash Basin in the East African Rift - multidisciplinary characterization using isotope hydrology , remote sensing and hydrochemistry

裂谷构造对东非裂谷阿瓦什盆地地下水系统的影响——利用同位素水文学、遥感和水化学进行多学科表征

• 批准号: 46690554
• 负责人: Dr. Karsten Osenbrück
• 金额: --
• 依托单位: Leibniz-Institut für Angewandte Geophysik (LIAG)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/46690554?language=en
• 关键词: Impact; rift; tectonics; groundwater; system

Located in the tectonically active East African Rift System, the Awash Basin in Ethiopia has a complex hydrogeological setting. Until now, the groundwater dynamics and the impact of the structural setting on groundwater flow in this region are not well understood, though the local population heavily depends on groundwater as a major water supply. Not only the use of groundwater, but also its impact on surface water is of importance in the Basin, as groundwater inflow related to recent tectonic activities appears to play a significant role in the rapid rise of the level of Lake Beseka (0.12 m/year). This in turn causes a frequent rebuilding of infrastructure in the affected area. With a combination of isotope hydrology, hydrogeochemistry and remote sensing the present study investigates the flow regime development and dynamics of groundwater including the vertical stratifications of the aquifers and groundwater flow affected by the tectonic setting.

埃塞俄比亚的阿瓦什盆地位于构造活跃的东非裂谷系，具有复杂的水文地质环境。尽管当地人口严重依赖地下水作为主要的供水来源，但到目前为止，该地区的地下水动态和构造环境对地下水流动的影响尚不清楚。不仅地下水的利用，其对地表水的影响在盆地中也很重要，因为与近期构造活动有关的地下水流入似乎在贝塞卡湖水位的快速上升（0.12 m/年）中发挥了重要作用。这反过来又导致受灾地区频繁重建基础设施。采用同位素水文学、水文地球化学和遥感相结合的方法，研究了地下水的流动状态、发展和动态，包括含水层的垂直分层和受构造环境影响的地下水流动。