Water Quality Assessment of Lake Manzala, Egypt: A Comparative Study

M. Elshemy
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引用次数: 11

Abstract

Lake Manzala is the largest Egyptian lagoon which is considered as one of the most important fishing sources in Egypt. The lake faces a lot of environmental challenges which affect its water quality status. The main objective of this study is assessing the water quality status of the lake using an appropriate Water Quality Index (WQI). Records for twelve water quality parameters during the period from August 2010 to August 2012 were collected from 11 stations in the lake and from 4 stations at the drains outlets. Two Water Quality Indices (National Sanitation Foundation WQI and Lagoon WQI) and a GIS tool were used to assess and spatially assign the water quality conditions of the lake. The results reveal critical water quality conditions for the lake. The eastern and southern zones of the lake have the worst water quality conditions, ranking as a "Very Bad" water quality status, according to L-WQI. While the western zone of the lake has the best water quality condition, which is "Good", according to L-WQI. Bahr Elbaqar drain has the worst water quality status "Very Bad", among the studied drains, which affect the water quality conditions of the lake, in particular the eastern zone of the lake. The worst water quality status of the lake was recorded in August 2011, according to both used indices. The spatial assigning of the lake water quality conditions ensures that the lake should be divided into different zones for fishing and other objectives. An urgent water quality management strategy should be implemented for the lake.
埃及曼萨拉湖水质评价的比较研究
曼萨拉湖是埃及最大的泻湖,被认为是埃及最重要的渔业资源之一。该湖泊面临着诸多环境挑战,影响着其水质状况。本研究的主要目的是利用适当的水质指数(WQI)来评估湖泊的水质状况。2010年8月至2012年8月,采集了湖内11个站点和排水口4个站点的12个水质参数记录。采用两个水质指标(国家卫生基金会WQI和泻湖WQI)和GIS工具对湖泊水质状况进行了评价和空间分配。结果揭示了该湖的临界水质条件。据L-WQI称,湖泊的东部和南部地区水质状况最差,水质状况为“非常差”。而西湖西部水质状况最好,为“良好”。在研究的水渠中,巴哈尔巴哈尔水渠的水质状况最差,为“极差”,影响了湖泊的水质状况,特别是湖的东部地区。根据两个使用的指数,该湖的最差水质状况是在2011年8月。湖泊水质条件的空间分配保证了湖泊应被划分为不同的捕鱼区和其他目的区。应对该湖实施紧急的水质管理策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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