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首页> 外文期刊>Lakes & Reservoirs >Comparative Assessment Of The Water Balance And Hydrology Of Selected Ethiopian And Kenyan Rift Lakes
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Comparative Assessment Of The Water Balance And Hydrology Of Selected Ethiopian And Kenyan Rift Lakes

机译：选定的埃塞俄比亚和肯尼亚裂谷湖水平衡和水文学的比较评估

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The study area is part of the East African Rift system, characterized by a cluster of lakes occupying an extremely faulted rift floor with geothermal manifestations. Some of the lakes illustrated contrasting water levels and size evolution over the last few decennia, believed to have been caused by various natural and anthropogenic factors. The relative importance of these factors, however, is unknown. This study attempts to present the hydrology of the lakes in a broader context, by giving more emphasis to lake water level fluctuations and to the water balance. These factors have far-reaching implications in regard to future management of the lake basin water. It also provides information on the relation of the groundwater with the lakes, and with the local and regional groundwater flow system from the adjacent highlands to the floor of the Rift. The methods utilized in this study include conventional hydrogeological field surveys, and hydrometeorological and data analyses, coupled with digital image processing and spatial analysis under a Geographic Information System environment. Ancillary supporting information has been obtained from environmental isotopes and hydrochemical data. The study results indicate the terminal Ethiopian lakes changed in size and water level significantly over the last half century. In contrast, the Kenyan lakes only exhibited slight changes. The lakes in both countries exhibit a striking similarity in their subsurface hydraulic connection, and are strongly governed by complex rift geological structures. Groundwater plays a vital role in the water balance of the study lakes. The study results indicate that future sustainable use of the study lakes demands that serious attention be given to the role of the groundwater component of the lake water balances.
机译：研究区域是东非大裂谷系统的一部分，其特征是一堆湖泊占据了具有地热表现的极为断层的大裂谷。在过去的十年中，一些湖泊的水位和水量变化形成了鲜明对比，据信这是由各种自然和人为因素造成的。但是，这些因素的相对重要性尚不清楚。这项研究试图通过更加强调湖泊水位的波动和水的平衡，在更广阔的背景下介绍湖泊的水文学。这些因素对未来流域水的管理具有深远的影响。它还提供了有关地下水与湖泊以及从相邻高地到裂谷底部的局部和区域地下水流动系统之间关系的信息。本研究中使用的方法包括常规水文地质调查，水文气象和数据分析，以及在地理信息系统环境下进行的数字图像处理和空间分析。辅助支持信息已从环境同位素和水化学数据中获得。研究结果表明，近半个世纪以来，埃塞俄比亚末代湖泊的大小和水位发生了显着变化。相反，肯尼亚的湖泊仅表现出细微的变化。两国的湖泊在地下水力连接方面表现出惊人的相似性，并且受复杂的裂谷地质构造的强烈制约。地下水在研究湖泊的水平衡中起着至关重要的作用。研究结果表明，研究湖泊的未来可持续利用要求认真关注湖泊水平衡中地下水成分的作用。

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