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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| Format: | Article |
| Language: | fra |
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Éditions en environnement VertigO
2018-05-01
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| Online Access: | https://journals.openedition.org/vertigo/19804 |
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| 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 |
| collection | DOAJ |
| 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 |
| id | doaj-art-849ab48c79bd40f097d5c1dc9acc48d5 |
| institution | Kabale University |
| issn | 1492-8442 |
| language | fra |
| publishDate | 2018-05-01 |
| publisher | Éditions en environnement VertigO |
| record_format | Article |
| series | VertigO |
| spelling | doaj-art-849ab48c79bd40f097d5c1dc9acc48d52025-01-09T12:36:07ZfraÉditions en environnement VertigOVertigO1492-84422018-05-0118110.4000/vertigo.19804Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-LibanHussein El Hage HassanLaurence CharbelLaurent TouchartThe 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.https://journals.openedition.org/vertigo/19804GISsoil erosionUSLEBékaaLebanon |
| spellingShingle | Hussein El Hage Hassan Laurence Charbel Laurent Touchart Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban VertigO GIS soil erosion USLE Békaa Lebanon |
| title | 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_short | Modélisation de l'érosion hydrique à l’échelle du bassin versant du Mhaydssé. Békaa-Liban |
| title_sort | modelisation de l erosion hydrique a l echelle du bassin versant du mhaydsse bekaa liban |
| topic | GIS soil erosion USLE Békaa Lebanon |
| url | https://journals.openedition.org/vertigo/19804 |
| work_keys_str_mv | AT husseinelhagehassan modelisationdelerosionhydriquealechelledubassinversantdumhaydssebekaaliban AT laurencecharbel modelisationdelerosionhydriquealechelledubassinversantdumhaydssebekaaliban AT laurenttouchart modelisationdelerosionhydriquealechelledubassinversantdumhaydssebekaaliban |