Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)

The Moulouya watershed presents high risks of water erosion. The dams built on this river lose each year, by siltation, a volume of water of about 10 M m3 (Lahlou, 1994). This worrying rate shows that water ero...

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Autores principales:	A. Sbai, O. Mouadili, M. Hlal, K. Benrbia, F. Zahra Mazari, M. Bouabdallah, A. Saidi
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental sciences GE1-350 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/7be2dfc355a445829b31a10bb0bc09a4
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id	oai:doaj.org-article:7be2dfc355a445829b31a10bb0bc09a4
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spelling	oai:doaj.org-article:7be2dfc355a445829b31a10bb0bc09a42021-11-16T07:01:14ZWater Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)10.5194/piahs-384-127-20212199-89812199-899Xhttps://doaj.org/article/7be2dfc355a445829b31a10bb0bc09a42021-11-01T00:00:00Zhttps://piahs.copernicus.org/articles/384/127/2021/piahs-384-127-2021.pdfhttps://doaj.org/toc/2199-8981https://doaj.org/toc/2199-899X<p>The Moulouya watershed presents high risks of water erosion. The dams built on this river lose each year, by siltation, a volume of water of about 10 M m<span class="inline-formula"><sup>3</sup></span> (Lahlou, 1994). This worrying rate shows that water erosion can hinder the socio-economic development of the basin if soil protection and siltation measures are not taken. This study defines the areas most threatened by water erosion to protect them as a priority. Using a GIS and the Universal Earth Loss Equation (USLE), we mapped soil losses. The adopted model determines soil loss from erosivity of rainfall, soil erodibility, inclination and slope length, soil cover, and erosion control practices. The possible origins of the deposits alluviating the dams are related to the products of alteration of the Secondary's carbonate formations and the Tertiary and Quaternary formations. The modalities of the transport of deposits of banks of the network of Moulouya are mainly by a suspension. The specific degradation in the Moulouya watershed is estimated at 214 t/km<span class="inline-formula"><sup>2</sup></span>/year. Precipitation intensity, steep slopes and deforestation are responsible for these losses.</p>A. SbaiO. MouadiliM. HlalK. BenrbiaF. Zahra MazariM. BouabdallahA. SaidiCopernicus PublicationsarticleEnvironmental sciencesGE1-350GeologyQE1-996.5ENProceedings of the International Association of Hydrological Sciences, Vol 384, Pp 127-131 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Geology QE1-996.5
spellingShingle	Environmental sciences GE1-350 Geology QE1-996.5 A. Sbai O. Mouadili M. Hlal K. Benrbia F. Zahra Mazari M. Bouabdallah A. Saidi Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)
description	<p>The Moulouya watershed presents high risks of water erosion. The dams built on this river lose each year, by siltation, a volume of water of about 10 M m<span class="inline-formula"><sup>3</sup></span> (Lahlou, 1994). This worrying rate shows that water erosion can hinder the socio-economic development of the basin if soil protection and siltation measures are not taken. This study defines the areas most threatened by water erosion to protect them as a priority. Using a GIS and the Universal Earth Loss Equation (USLE), we mapped soil losses. The adopted model determines soil loss from erosivity of rainfall, soil erodibility, inclination and slope length, soil cover, and erosion control practices. The possible origins of the deposits alluviating the dams are related to the products of alteration of the Secondary's carbonate formations and the Tertiary and Quaternary formations. The modalities of the transport of deposits of banks of the network of Moulouya are mainly by a suspension. The specific degradation in the Moulouya watershed is estimated at 214 t/km<span class="inline-formula"><sup>2</sup></span>/year. Precipitation intensity, steep slopes and deforestation are responsible for these losses.</p>
format	article
author	A. Sbai O. Mouadili M. Hlal K. Benrbia F. Zahra Mazari M. Bouabdallah A. Saidi
author_facet	A. Sbai O. Mouadili M. Hlal K. Benrbia F. Zahra Mazari M. Bouabdallah A. Saidi
author_sort	A. Sbai
title	Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)
title_short	Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)
title_full	Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)
title_fullStr	Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)
title_full_unstemmed	Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)
title_sort	water erosion in the moulouya watershed and its impact on dams' siltation (eastern morocco)
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/7be2dfc355a445829b31a10bb0bc09a4
work_keys_str_mv	AT asbai watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco AT omouadili watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco AT mhlal watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco AT kbenrbia watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco AT fzahramazari watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco AT mbouabdallah watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco AT asaidi watererosioninthemoulouyawatershedanditsimpactondamssiltationeasternmorocco
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Water Erosion in the Moulouya Watershed and its Impact on Dams' Siltation (Eastern Morocco)

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