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Spatiotemporal effects of wastewater ponds from a geoenvironmental perspective in the Kharga region, Egypt
Progress in Physical Geography: Earth and Environment ( IF 3.9 ) Pub Date : 2019-10-13 , DOI: 10.1177/0309133319879321 Mahmoud H Darwish 1 , Wael F Galal 2
Progress in Physical Geography: Earth and Environment ( IF 3.9 ) Pub Date : 2019-10-13 , DOI: 10.1177/0309133319879321 Mahmoud H Darwish 1 , Wael F Galal 2
Affiliation
One of the major geoenvironmental problems in the Kharga region arises from the haphazard exploitation of groundwater resources and sewage dumping, which have resulted in wastewater accumulation in the form of ponds. The impact of the spatial expansion of wastewater ponds in Kharga and the surrounding area has been so pervasive that ponds have become a source of environmental degradation. These ponds are distributed throughout the area, but the major lakes are located in the eastern and southeastern provinces. The water levels of these ponds are rising at a remarkable rate, especially in the winter, when there is no evaporation and rainfall can lead to overflows that flow towards cities, villages and farmlands. As a result of untreated sewage inflows, all the low surrounding spaces are at high risk of being influenced by these ponds. The objectives of this study were to evaluate the spatiotemporal threats posed by wastewater ponds and develop a conceptual model to estimate the geoenvironmental impacts on the surrounding areas. GIS and remote sensing were used to process all available geological, topographical, hydrogeological, hydrological, land use and environmental data. The pond expansion trend was estimated from Landsat time series from 1984 to 2018, and the results indicated that the wastewater bodies continuously increased and the land cover percentage decreased. The encroachment of wastewater ponds has resulted in extensive land cover disturbances in recent years, and land use change has affected nearly 2.5% of the region. The complexity of the problems associated with wastewater ponds in the Kharga district requires a comprehensive management plan that is effective in not only maintaining the stability of the ponds but also in improving the sociocultural and economic conditions around the ponds. Specifically, the wastewater drainage and accumulation system should be managed according to the surrounding functional context.
中文翻译:
从地球环境角度看埃及哈尔加地区污水池的时空效应
Kharga 地区的主要地质环境问题之一是随意开采地下水资源和倾倒污水,导致废水以池塘的形式积聚。Kharga 及周边地区污水池空间扩张的影响如此普遍,以至于池塘已成为环境退化的源头。这些池塘分布在整个地区,但主要湖泊位于东部和东南部省份。这些池塘的水位正在以惊人的速度上升,尤其是在冬天,没有蒸发,降雨会导致溢出,流入城市、村庄和农田。由于未经处理的污水流入,所有低矮的周围空间都面临着受到这些池塘影响的高风险。本研究的目的是评估污水池造成的时空威胁,并开发一个概念模型来估计对周边地区的地质环境影响。地理信息系统和遥感被用来处理所有可用的地质、地形、水文地质、水文、土地利用和环境数据。从1984年至2018年的Landsat时间序列估算池塘扩张趋势,结果表明废水体不断增加,土地覆盖率下降。近年来,污水池的侵占导致了广泛的土地覆盖扰动,土地利用变化影响了该地区近 2.5% 的地区。Kharga 地区废水池相关问题的复杂性需要一个全面的管理计划,该计划不仅能有效地保持池塘的稳定性,还能改善池塘周围的社会文化和经济条件。具体而言,污水排放和蓄积系统应根据周围的功能环境进行管理。
更新日期:2019-10-13
中文翻译:
从地球环境角度看埃及哈尔加地区污水池的时空效应
Kharga 地区的主要地质环境问题之一是随意开采地下水资源和倾倒污水,导致废水以池塘的形式积聚。Kharga 及周边地区污水池空间扩张的影响如此普遍,以至于池塘已成为环境退化的源头。这些池塘分布在整个地区,但主要湖泊位于东部和东南部省份。这些池塘的水位正在以惊人的速度上升,尤其是在冬天,没有蒸发,降雨会导致溢出,流入城市、村庄和农田。由于未经处理的污水流入,所有低矮的周围空间都面临着受到这些池塘影响的高风险。本研究的目的是评估污水池造成的时空威胁,并开发一个概念模型来估计对周边地区的地质环境影响。地理信息系统和遥感被用来处理所有可用的地质、地形、水文地质、水文、土地利用和环境数据。从1984年至2018年的Landsat时间序列估算池塘扩张趋势,结果表明废水体不断增加,土地覆盖率下降。近年来,污水池的侵占导致了广泛的土地覆盖扰动,土地利用变化影响了该地区近 2.5% 的地区。Kharga 地区废水池相关问题的复杂性需要一个全面的管理计划,该计划不仅能有效地保持池塘的稳定性,还能改善池塘周围的社会文化和经济条件。具体而言,污水排放和蓄积系统应根据周围的功能环境进行管理。