Groundwater management in semiarid and arid regions, like northern Egypt, is essential for the sustainability of scarce resources through monitoring groundwater status and sources of recharge to the aquifer. In the Qalyubia Governorate, Nile Delta, Egypt, the study examined the recharge of groundwater in lands subject to flood irrigation and compared it with water-saving irrigation methods to detect how irrigation practices influence the potentiality of groundwater. A simulation of the two irrigation techniques, flood irrigation, and water-saving irrigation, was performed. Using GMS, simulations are done to calculate the water balance in the main 8 districts of Qalyubia Governorate. In comparison to flood irrigation, it was found that water-saving irrigation has less recharge intensity, which in turn causes a lowering in groundwater levels. The decline in groundwater table ranges between 10 and 50 cm. Modern irrigation influences the potentiality of the Nile Delta aquifer, which can’t be underestimated.

中文翻译：

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现代灌溉与漫灌对老粘土地地下水潜力的评估

埃及北部等半干旱和干旱地区的地下水管理对于通过监测地下水状况和含水层补给来源来维持稀缺资源至关重要。在埃及尼罗河三角洲的卡尤比亚省，该研究考察了漫灌土地的地下水补给情况，并将其与节水灌溉方法进行比较，以了解灌溉做法如何影响地下水潜力。对漫灌和节水灌溉两种灌溉技术进行了模拟。使用 GMS 进行模拟计算 Qalyubia 省主要 8 个地区的水平衡。研究发现，与漫灌相比，节水灌溉的补给强度较小，从而导致地下水位下降。地下水位下降10至50厘米。现代灌溉对尼罗河三角洲含水层的潜力产生了不可低估的影响。