Impact of reduced flow on 137Cs behavior in Ismailia Canal and surrounding groundwater systems

Sadek, M. A.; Hagagg, Kamilia

doi:10.1007/s11356-020-10242-z

Cited by 1 publication

(1 citation statement)

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“…Arid and semi-arid regions such as Egypt have recently suffered from water scarcity, which is getting more severe due to global climate change [1] and the establishment of dams in the Blue Nile, such as the Grand Ethiopian Renaissance Dam (GERD) [2,3]. Seepage losses from unlined irrigation canals are considered a significant reason for water losses, in addition to evaporation loss, and these losses reduce the conveyance efficiency [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Canal Seepage Loss Evaluation for Different Lining and Crack Techniques in Arid and Semi-Arid Regions: A Case Study of the River Nile, Egypt

Elkamhawy

Zeleňáková

Abd‐Elaty

2021

Water

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Owing to the potential negative impacts of climatic changes and the grand Ethiopian renaissance dam, water scarcity has become an urgent issue. Therefore, the Egyptian Ministry of Water Resources and Irrigation has started a national project of the lining and rehabilitation of canals, to reduce seepage losses and for efficient water resource management. This study presents a new approach for assessing three different lining and crack techniques for the Ismailia canal, the largest end of the river Nile, Egypt. A 2-D steady state seep/w numerical model was developed for the Ismailia canal section, in the stretch at 28.00–49.00 km. The amount of seepage was significantly dependent on the hydraulic characteristics of the liner material. The extraction from aquifers via wells also had a considerable impact on the seepage rate from the unlined canals; however, a lesser effect was present in the case of lined canals. The concrete liner revealed the highest efficiency, followed by the geomembrane liner, and then the bentonite liner; with almost 99%, 96%, and 54%, respectively, without extraction, and decreasing by 4% for bentonite and geomembrane liners during extraction; however, the concrete lining efficiency did not change considerably. Nevertheless, the efficiency dramatically decreased to 25%, regardless of the lining technique, in the case of deterioration of the liner material. The double effect of both deterioration of the liner material and extraction from the aquifer showed a 16% efficiency, irrespective of the utilized lining technique.

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