Seepage losses from trapezoidal earth canals with an impervious layer under the bed

Seepage of irrigation water from earth canals is one of the most significant causes of water loss. It should be carefully studied and controlled. This research aims to study the effect of the presence of an impervious layer under the bed of trapezoidal earth canals on the amount of seepage discharge...

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Autores principales:	Doaa A. El-Molla, Mohamed A. El-Molla
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	conveyance losses impervious layer numerical model seep2d seepage trapezoidal earth canals Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/cc7ca179b69a482baaa9b21401a3f668
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spelling	oai:doaj.org-article:cc7ca179b69a482baaa9b21401a3f6682021-11-05T21:09:09ZSeepage losses from trapezoidal earth canals with an impervious layer under the bed1751-231X10.2166/wpt.2021.010https://doaj.org/article/cc7ca179b69a482baaa9b21401a3f6682021-04-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/2/530https://doaj.org/toc/1751-231XSeepage of irrigation water from earth canals is one of the most significant causes of water loss. It should be carefully studied and controlled. This research aims to study the effect of the presence of an impervious layer under the bed of trapezoidal earth canals on the amount of seepage discharge. The finite element numerical model SEEP2D is used in the study. Different scenarios for the canal's dimensions and side slopes are considered. Various values for the vertical distance between the canal's bed and the impervious layer are also studied. The numerical model's results are verified using Vedernikov's equations. The results show that the presence of an impervious layer can reduce the amount of seepage discharge by up to 82.7% compared to that calculated without it, depending on the depth of the pervious layer, the ratio between canal's bed width to water depth, and the side slopes. It is recommended to have boreholes at canal construction sites in order to investigate if an impervious layer exists under the canal's bed. This helps to estimate the correct amount of seepage discharge based on the vertical distance from the canal's bed to the impervious layer under it. Design charts are also provided. Highlights Evaluates the effect of impervious layer under canals’ bed on seepage discharge.; Simulates seepage from earth canals using SEEP2D numerical model.;Doaa A. El-MollaMohamed A. El-MollaIWA Publishingarticleconveyance lossesimpervious layernumerical modelseep2dseepagetrapezoidal earth canalsEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 2, Pp 530-540 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	conveyance losses impervious layer numerical model seep2d seepage trapezoidal earth canals Environmental technology. Sanitary engineering TD1-1066
spellingShingle	conveyance losses impervious layer numerical model seep2d seepage trapezoidal earth canals Environmental technology. Sanitary engineering TD1-1066 Doaa A. El-Molla Mohamed A. El-Molla Seepage losses from trapezoidal earth canals with an impervious layer under the bed
description	Seepage of irrigation water from earth canals is one of the most significant causes of water loss. It should be carefully studied and controlled. This research aims to study the effect of the presence of an impervious layer under the bed of trapezoidal earth canals on the amount of seepage discharge. The finite element numerical model SEEP2D is used in the study. Different scenarios for the canal's dimensions and side slopes are considered. Various values for the vertical distance between the canal's bed and the impervious layer are also studied. The numerical model's results are verified using Vedernikov's equations. The results show that the presence of an impervious layer can reduce the amount of seepage discharge by up to 82.7% compared to that calculated without it, depending on the depth of the pervious layer, the ratio between canal's bed width to water depth, and the side slopes. It is recommended to have boreholes at canal construction sites in order to investigate if an impervious layer exists under the canal's bed. This helps to estimate the correct amount of seepage discharge based on the vertical distance from the canal's bed to the impervious layer under it. Design charts are also provided. Highlights Evaluates the effect of impervious layer under canals’ bed on seepage discharge.; Simulates seepage from earth canals using SEEP2D numerical model.;
format	article
author	Doaa A. El-Molla Mohamed A. El-Molla
author_facet	Doaa A. El-Molla Mohamed A. El-Molla
author_sort	Doaa A. El-Molla
title	Seepage losses from trapezoidal earth canals with an impervious layer under the bed
title_short	Seepage losses from trapezoidal earth canals with an impervious layer under the bed
title_full	Seepage losses from trapezoidal earth canals with an impervious layer under the bed
title_fullStr	Seepage losses from trapezoidal earth canals with an impervious layer under the bed
title_full_unstemmed	Seepage losses from trapezoidal earth canals with an impervious layer under the bed
title_sort	seepage losses from trapezoidal earth canals with an impervious layer under the bed
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/cc7ca179b69a482baaa9b21401a3f668
work_keys_str_mv	AT doaaaelmolla seepagelossesfromtrapezoidalearthcanalswithanimperviouslayerunderthebed AT mohamedaelmolla seepagelossesfromtrapezoidalearthcanalswithanimperviouslayerunderthebed
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Seepage losses from trapezoidal earth canals with an impervious layer under the bed

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