Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban

The high plains of Lebanon are subject to water erosion which tends to strip its soils and threaten its agricultural activities. The combined effect of anthropogenic actions (cultural management, deforestation, overgrazing) and natural factors (climatic aggressiveness, steep slopes, soil), weakens t...

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Autores principales:	Hussein el Hage Hassan, Laurence Charbel, Laurent Touchart
Formato:	article
Lenguaje:	FR
Publicado:	Éditions en environnement VertigO 2018
Materias:	soil erosion USLE GIS Békaa Lebanon Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/ab4dbb8b7e114f4682139156e687da09
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id	oai:doaj.org-article:ab4dbb8b7e114f4682139156e687da09
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spelling	oai:doaj.org-article:ab4dbb8b7e114f4682139156e687da092021-12-02T09:59:31ZModélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban1492-844210.4000/vertigo.19804https://doaj.org/article/ab4dbb8b7e114f4682139156e687da092018-05-01T00:00:00Zhttp://journals.openedition.org/vertigo/19804https://doaj.org/toc/1492-8442The high plains of Lebanon are subject to water erosion which tends to strip its soils and threaten its agricultural activities. The combined effect of anthropogenic actions (cultural management, deforestation, overgrazing) and natural factors (climatic aggressiveness, steep slopes, soil), weakens the soil and threatens agricultural parcels by depositing sediments. Mhaydssé is a village concerned by this problem and its representative of the natural and anthropogenic conditions of the Békaa’s southeast. The study uses GIS and the Universal Earth Loss Equation (USLE). To replace the intensity of precipitation, the aggressiveness index was calculated from the equation of Renard and Freimund. Five soil types were sampled, for which the soil granulometry was analyzed in five classes. The topography (slope), the vegetation cover and the anti-erosion practices are the other factors that have been quantified. Of the 1800 hectares of the study area, the average loss of land is 46 t / ha / year. This high value comes from a high spatial heterogeneity. The barren slopes are subject to rates above 300 t /ha /yr, while the bottom of the plain is practically untouched. Large spatial differences over small distances confirm the thoroughness of an accurate analysis of soil texture.Hussein el Hage HassanLaurence CharbelLaurent TouchartÉditions en environnement VertigOarticlesoil erosionUSLEGISBékaaLebanonEnvironmental sciencesGE1-350FRVertigO, Vol 18, Iss 1 (2018)
institution	DOAJ
collection	DOAJ
language	FR
topic	soil erosion USLE GIS Békaa Lebanon Environmental sciences GE1-350
spellingShingle	soil erosion USLE GIS Békaa Lebanon Environmental sciences GE1-350 Hussein el Hage Hassan Laurence Charbel Laurent Touchart Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban
description	The high plains of Lebanon are subject to water erosion which tends to strip its soils and threaten its agricultural activities. The combined effect of anthropogenic actions (cultural management, deforestation, overgrazing) and natural factors (climatic aggressiveness, steep slopes, soil), weakens the soil and threatens agricultural parcels by depositing sediments. Mhaydssé is a village concerned by this problem and its representative of the natural and anthropogenic conditions of the Békaa’s southeast. The study uses GIS and the Universal Earth Loss Equation (USLE). To replace the intensity of precipitation, the aggressiveness index was calculated from the equation of Renard and Freimund. Five soil types were sampled, for which the soil granulometry was analyzed in five classes. The topography (slope), the vegetation cover and the anti-erosion practices are the other factors that have been quantified. Of the 1800 hectares of the study area, the average loss of land is 46 t / ha / year. This high value comes from a high spatial heterogeneity. The barren slopes are subject to rates above 300 t /ha /yr, while the bottom of the plain is practically untouched. Large spatial differences over small distances confirm the thoroughness of an accurate analysis of soil texture.
format	article
author	Hussein el Hage Hassan Laurence Charbel Laurent Touchart
author_facet	Hussein el Hage Hassan Laurence Charbel Laurent Touchart
author_sort	Hussein el Hage Hassan
title	Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban
title_short	Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban
title_full	Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban
title_fullStr	Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban
title_full_unstemmed	Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban
title_sort	modélisation de l'érosion hydrique à l’échelle du bassin versant du mhaydssé. békaa-liban
publisher	Éditions en environnement VertigO
publishDate	2018
url	https://doaj.org/article/ab4dbb8b7e114f4682139156e687da09
work_keys_str_mv	AT husseinelhagehassan modelisationdelerosionhydriquealechelledubassinversantdumhaydssebekaaliban AT laurencecharbel modelisationdelerosionhydriquealechelledubassinversantdumhaydssebekaaliban AT laurenttouchart modelisationdelerosionhydriquealechelledubassinversantdumhaydssebekaaliban
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Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban

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