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首页> 外文期刊>Journal of Hydroinformatics >Eutrophication assessment of Lake Manzala, Egypt using geographical information systems (GIS) techniques
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Eutrophication assessment of Lake Manzala, Egypt using geographical information systems (GIS) techniques

机译：利用地理信息系统（GIS）技术评估埃及曼萨拉湖的富营养化

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摘要

Lake Manzala is in grave clanger of suffering pollution from the drainage of industries, agriculture and urban sewage that affects the physio-chemical and biological parameters in the lake. A geographical information system (GlS)-based method of lake trophic status assessment was undertaken to study the spatial distribution of eutrophic conditions of Lake Manzala. In the present study, tabular data supported by field checks have been analyzed by GIS functions and operations to assess, monitor and model the environmental conditions of the lake. A representation of the spatial distribution was developed using the inverse distance weighted (IDW) interpolation method. The eutrophic state index was calculated to describe the state of the lake's environment. A GIS overlay technique was applied to synthesize the information into a final map illustrating the spatial distribution of eutrophication conditions within the study area. The different levels associated with trophic status classification using GIS were then discussed in relation to environmental change and external loading from tributary inflows. The study revealed that the lake changed to eutrophic freshwater. This change is due to the increase of freshwater inputs and nutrient loading associated with agricultural land reclamation and urban waste disposal.
机译：工业，农业和城市污水的排泄影响着湖的理化和生物参数，曼萨拉湖处于严重的污染边缘。基于地理信息系统（GlS）的湖泊营养状态评估方法研究了曼萨拉湖富营养化条件的空间分布。在本研究中，通过GIS功能和操作分析了由现场检查支持的表格数据，以评估，监测和模拟湖泊的环境状况。使用逆距离加权（IDW）插值方法开发了空间分布的表示形式。计算了富营养状态指数以描述湖泊环境的状态。应用GIS覆盖技术将信息合成为最终地图，该地图说明了研究区域内富营养化条件的空间分布。然后讨论了与使用GIS进行的营养状况分类相关的不同级别，涉及环境变化和支流流入带来的外部负荷。研究表明，该湖变成了富营养化的淡水。这种变化是由于与农业土地开垦和城市废物处置有关的淡水投入和养分含量的增加。

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