Abstract

Disposal and accumulation of agricultural and sanitary wastewater in poorly engineered ponds in the Mut region, Dakhla Oasis of Egypt is a concern due to their poor water quality; significant expansion over a large spatial area, and their consequential impact on the environment. GIS and remote sensing were useful tools for determining spatiotemporal and the impact of wastewater ponds and land use/cover. The objective of this study is to map wastewater ponds and land use/cover changes over the period of 1984 to 2019. For this purpose, multi-temporal Landsat chronological images were used to assess the spatiotemporal activities. The findings indicated that the total area of wastewater bodies were about 1.79 km² in 1984, 3.92 km² in 2000, and 7.91 km² in 2019. This progressive spatial growth is a response to irresponsible usage of groundwater. Several environmental impacts were noticed, including depletion of the groundwater table, and soil salinization is one aspect of land degradation process. Finally, this study proposes implementation of a strict groundwater resource conservation act, preventing uncontrolled irrigation flooding and suggesting suitable low water consumption agricultural crops.

摘要

由于水质差，埃及达赫拉绿洲穆特地区设计不良的池塘中农业和卫生废水的处理和积累令人担忧；大空间区域的显着扩张及其对环境的影响。GIS 和遥感是确定废水池和土地利用/覆盖的时空和影响的有用工具。本研究的目的是绘制 1984 年至 2019 年期间废水池和土地利用/覆盖变化的地图。为此，使用多时相 Landsat 时间序列图像来评估时空活动。结果表明， 1984年污水体总面积约为1.79 km ^{2 ，2000年为3.92 km 2}，7.91 km ^{2 。}2019 年。这种渐进的空间增长是对不负责任地使用地下水的回应。人们注意到了一些环境影响，包括地下水位的枯竭，土壤盐渍化是土地退化过程的一个方面。最后，本研究建议实施严格的地下水资源保护法，防止不受控制的灌溉洪水，并建议合适的低耗水农作物。