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Assessment of New Esna barrage impacts on groundwater and proposed measures

机译：评估新埃斯纳弹幕对地下水的影响及建议措施

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Nile valley quaternary aquifer is in direct hydraulic interaction with Nile River, canals and drains. Therefore, implementation of new Esna barrage leads to enhancement of seepage flow from Nile River toward adjacent agricultural lands, impedance of drainage conditions and increase in the shallow groundwater levels beneath buildings in urban areas. Therefore, Esna city was selected as the study area to assess the impact of the barrage effect on groundwater aquifer and to propose mitigation measures. The most powerful method for studying the problem is developing a groundwater model based on monitored groundwater levels and simulating the effect of the proposed measures. Results indicated that Nile River in reaches upstream the barrage feeds the aquifer. Then, a model is used to test the effect of the mitigation measures on the surrounding settlements. Results also indicated that using cut off drains with depth of 2.5m is the most effective and safe solution, in terms of direct impact on the buildings without need for operation cost – only maintenance cost will be needed. Also, implementing a sewage network in the city as a long-term solution is recommended.
机译：尼罗河谷第四纪含水层与尼罗河，运河和排水沟直接水力相互作用。因此，实施新的埃斯纳（Esna）拦河坝会导致从尼罗河流向相邻农田的渗流增加，排水条件的阻抗增加以及城市建筑物下方的浅层地下水位增加。因此，选择埃斯纳市作为研究区域，以评估拦河坝效应对地下水含水层的影响并提出缓解措施。研究该问题的最有效方法是根据监测的地下水位开发地下水模型，并模拟所提出措施的效果。结果表明，尼罗河在大坝上游到达了蓄水层。然后，使用一个模型来测试缓解措施对周围居民点的影响。结果还表明，就直接影响建筑物而无需运营成本而言，使用深度为2.5m的截断排水管是最有效和安全的解决方案，仅需维护成本。另外，建议在城市中建立污水处理网络作为长期解决方案。

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