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The impact of rainfall distribution patterns on hydrological and hydraulic response in arid regions: case study Medina, Saudi Arabia / Mohamed Abdulrazzak in Arabian Journal of Geosciences, vol 11 n° 21 (November 2018)  

Public [article]  inArabian Journal of Geosciences > vol 11 n° 21 (November 2018) Titre : The impact of rainfall distribution patterns on hydrological and hydraulic response in arid regions: case study Medina, Saudi Arabia Type de document : Article/Communication Auteurs : Mohamed Abdulrazzak, Auteur ; Amro Elfeki, Auteur ; Ahmed Samy Kamis, Auteur ; Mostafa Kassab, Auteur ; Nassir Alamri, Auteur ; Kashif Noor, Auteur ; Anis Chaabani, Auteur Année de publication : 2018 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] Arabie Saoudite [Termes descripteurs IGN] inondation [Termes descripteurs IGN] modèle hydrographique [Termes descripteurs IGN] précipitation [Termes descripteurs IGN] zone aride Résumé : (auteur) Rainfall distribution patterns (RDPs) are crucial for hydrologic design. Hydrologic modeling is based on Soil Conservation Services (SCS) type RDPs (SCS type I, IA, II, and III). SCS type II method is widely used by hydrologists in arid regions. These RDPs were designed for the USA and similar temperate regions. There is no scientific justification for using SCS type II method in arid regions. The consequences of using SCS type II have impacts on the hydrologic and hydraulic modeling studies. The current paper investigates the validity of the SCS type II and in arid regions. New temporal RDPs were applied and compared with SCS type II RDPs. The produced peak discharges, volumes, maximum inundation depths, top widths, and velocities from both approaches were analyzed. An application is made on the protection channel in Taibah and Islamic Universities campuses in Medina, Saudi Arabia. A methodology was followed which included frequency analysis, catchment modeling, hydrological modeling, and hydraulic modeling. Results indicated that there are considerable consequences on infrastructural design, and hydrologic and hydraulic parameters if inappropriate RDPs are used. The investigation confirmed that the SCS type RDPs do not reflect the actual flood features in arid regions. Numéro de notice : A2018-668 Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s12517-018-4043-z date de publication en ligne : 08/11/2018 En ligne : http://dx.doi.org/10.1007/s12517-018-4043-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94265 [article]

A GIS-based soil erosion prediction using the Revised Universal Soil Loss Equation (RUSLE) (Lebna watershed, Cap Bon, Tunisia) / I. Gaubi in Natural Hazards, Vol. 86, n° 1 (Mars 2007)  

Public [article]  inNatural Hazards > Vol. 86, n° 1 (Mars 2007) . - pp 219 - 239 Titre : A GIS-based soil erosion prediction using the Revised Universal Soil Loss Equation (RUSLE) (Lebna watershed, Cap Bon, Tunisia) Type de document : Article/Communication Auteurs : I. Gaubi, Auteur ; Anis Chaabani, Auteur ; A. Ben Mammou, Auteur ; M. H. Hamza, Auteur Année de publication : 2017 Article en page(s) : pp 219 - 239 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes descripteurs IGN] barrage [Termes descripteurs IGN] bassin hydrographique [Termes descripteurs IGN] érosion hydrique [Termes descripteurs IGN] géologie locale [Termes descripteurs IGN] modèle de simulation [Termes descripteurs IGN] Tunisie Mots-clés libres : Revised Universal Soil Loss Equation (RUSLE) Résumé : (auteur) Soil erosion is a natural process causing grave land degradation problems. In Tunisia, soil erosion represents a serious environmental problem. Both man-made and natural phenomenon is reducing acres of agricultural land. The problem of soil erosion by water is very critical in Lebna watershed. In fact, Lebna is a town in the northeast of Tunisia and it seems high time to protect water and ground resources and to prevent the Lebna dam situated in the downstream from silting. In this context, the application of geographic RUSLE model using the techniques of geographic information system (GIS) and remote sensing has made it possible to assess the estimation of the soil erosion risk at the targeted watershed. This model is composed of several factors associated with climate, topography, soil and vegetation. The spatial distribution of annual average rate of soil loss resulting of this methodology shows an average of 24 ton/ha/year. Consequently, this method based on a combination of RUSLE as erosion model gave very similar results with bathymetric measures performed by Institute of Research for Development. It was about 29 ton/ha/year. Accordingly, Lebna watershed belongs to a zone of rather a steep erosive potential knowing that the maximum acceptable limit value of the erosive potential estimated is 12 ton/ha/year (Roose in Introduction à la gestion conservatoire de l’eau, de la biomasse et de la fertilité des sols (GCES), FAO, Rome, 1994). The results have shown that Lebna watershed has a serious risk on soil erosion on sloping land. The highest values are mainly associated with the steep slopes, poor conservation practices, low vegetation cover and high rainfall. The final soil loss map can be thus a base to plan appropriate strategies for decision-makers to avoid soil erosion risks and consequently to lengthen dam life. Numéro de notice : A2017-887 Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s11069-016-2684-3 date de publication en ligne : 22/11/2016 En ligne : https://link.springer.com/article/10.1007/s11069-016-2684-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91869 [article]