Cartografía de riesgo de inundaciones por ríos caudalosos mediante modelos hidráulicos y SIG: caso de Oued El Harrach (Norte de Argelia)

Revista oficial de la Asociación Española de Teledetección[EN] The aim of the present study is the management of flood risk through the use of cartography of flood hazards by overflowing rivers. This cartography is developed using modern simulation tools namely the hydraulic model (HECRAS) as well as the Geographic Information System (ArcGis). The study concerns Oued El Harrach (North of Algeria) surrounding area which has been subject to several floods causing significant human and material damage. This loss is a consequence of the use flood zones as habitats for people. This can be avoided in the future by use the mapping of the spatial extent of the flood hazard on the land of the Oued El Harrach. Hence the importance of the cartography developed in this study as an essential tool for decision makers in prevention, protection and management of flood risks.[ES] El objeto de este estudio es la gestión del riesgo de inundaciones mediante el uso de cartografía de riesgo de inundaciones por ríos caudalosos. La cartografía se obtiene mediante aplicaciones de simulación modernas, como el modelo hidráulico (HEC- RAS) y la aplicación informática de Sistemas de Información Geográfica (SIG) ArcGis. El estudio se aplica en los alrededores de Oued El Harrach (norte de Argelia), objeto de varias inundaciones que han generado pérdidas humanas y materiales considerables. Estas pérdidas son consecuencia del uso de zonas inundables como zonas residenciales, pudiendo evitarse en el futuro en la zona de Oued El Harrach con la ayuda de cartografía del alcance espacial de los riesgos de inundación. Por ello la importancia de la cartografía desarrollada en este estudio como herramienta esencial para los gestores en prevención y protección en materia de riesgos de inundacionesAstite, SW.; Medjerab, A.; Belabid, N.; El Mahmouhi, N.; El Wartiti, M.; Kemmou, S. (2015). Cartography of flood hazard by overflowing rivers using hydraulic modeling and geographic information system: Oued El Harrach case (North of Algeria). Revista de Teledetección. (44):67-79. doi:10.4995/raet.2015.3985.SWORD677944Bailly, A., Ferras, R., Pumain, D. 1995. Encyclopédie de Géographie. Paris:Economica.Bordet, J. 2007. L'eau dans son environnement rural. Assainissement des agglomérations. Paris: Johanet.Bravard, J.P., Petit, F. 1997. Les cours d'eau. Dynamique du système fluvial. Paris: Armand Colin.Dauphine, A. 2005. Risques et catastrophes: observer, spatialiser, comprendre et gérer. Paris: Armand Colin.Lamarrad, D. 2005. Les risques climatiques. Paris: Berlin

Carta dei geomorfositi e della geodiversita\u2019 nella regione d\u2019Ifrane-Azrou (Medio Atlante, Marocco)

Questo lavoro ha consentito di realizzare una Carta dei Geomorfositi dell\u2019area di Azrou-Ifrane nel Medio Atlante, elaborata su un\u2019immagine Landsat ETM+. La Carta riassume le conoscenze sulle valenze geomorfologiche di questo interessante e suggestivo territorio classificate con criteri scientifici ma allo stesso tempo in maniera semplice e chiara, e pu\uf2 fungere da base per ulteriori ricerche in quest\u2019ambito in altre aree marocchine

Carta dei Geomorfositi e della Geodiversita’ d’ifrane-Azrou (Medio Atlante, Marocco )

This research has been carried out in the framework of a Doctorate Thesis at the University Mohammed V-Agdal of Rabat (Ms. Amina Malaki) and has consisted in the individuation, the study and the cataloguing of forty sites of geological and geomorphological interest of particular scientific, didactic or touristic-cultural value in the region of the Middle Atlas of Ifrane-Azrou (Morocco). The choice of geosites and geomorphosites as main objective of this thesis is determined by the absolute lack of specific researches on these topics in Morocco, but also by the existence of geological and geomorphological characteristics and phenomena that ensure the presence of a large number of natural and cultural sites related to geology and geomorphology, that deserve to be better known, safeguarded and valorised. The acquired information, together with several itineraries, have been resumed in a geo-thematic Map that represents a valid synthesis of the obtained results, able to give an overview of the consistence and of the territorial distribution of the geological and geomorphological sites, representing the geological heritage of the Middle Atlas, up to now mostly ignored or poorly evaluated. This Map contains the proposals for the integration of the traditional tourist routes mainly based on cultural heritage (e.g. imperial cities) with these geomorphological sites and the geological landscape

Geosites and touristic development of the northwestern tabular Middle Atlas of Morocco

Descrizione di alcuni geositi nel Medio Atlante e loro importanza per il turism

Geo-environmental risk in the upper valley of the Oued Sebou (Fès, Central Morocco): A preliminary approach

In the framework of several projects sustained by the Regional Sardinian Government Laws no. 43 (28/09/1990) and no. 19 (11/04/1996), research groups of the University of Cagliari (Sardinia, Italy) and of the University Mohamed V-Agdal of Rabat (Morocco) have started a series of preliminary geo-environmental studies in the basin of the Oued Sebou. An area of almost 1000square km around the famous city of Fe's has been studied, using satellite images and two ground surveying campaigns. These surveys aim to define the geological and structural settings, the vegetation and land use, in order to define the landscape units and to select the areas of major hydrogeological and geo-environmental risk. The satellite data used are the LANDSAT TM5 images taken on the 9th of October 1997. These images have been analysed to obtain the different bases for further thematic mapping, resulting in the geo-environmental map of the area around Fe's that constitutes an up-to-date representation of the geological and environmental state of the territory and a useful instrument for further risk assessment and urban and territorial planning. © 2004 Elsevier Ltd. All rights reserved

Geo-environmental risk in the upper valley of the Oued Sebou (Fes, central Morocco): a preliminary approach.

In the framework of several projects sustained by the Regional Sardinian Government Laws n\ub0 43 (28/09/1990) and n\ub0 19 (11/04/1996), research groups of the University of Cagliari (Sardinia, Italy) and of the University Mohamed V-Agdal of Rabat (Morocco) have started a series of preliminary geo-environmental studies in the basin of the Oued Sebou. An area of almost 1000 square km around the famous city of F\ue8s has been studied, using satellite images and two ground surveying campaigns. These surveys aim to define the geological and structural settings, the vegetation and land use, in order to define the landscape units and to select the areas of major hydrogeological and geo-environmental risk. The satellite data used are the LANDSAT TM5 images taken on the 9th of October 1997. These images have been analysed to obtain the different bases for further thematic mapping, resulting in the Geo-environmental map of the area around F\ue8s that constitutes an up-to-date representation of the geological and environmental state of the territory and a useful instrument for further risk assessment and urban and territorial planning

08 Applying revised

Erosion is among natural phenomena with the most concern regarding hydraulic policy that Morocco undertakes to promote the social and economic development. At a landscape scale erosion causes loss of nutrients and a decline of productivity. Several methods have been developed to study this phenomenon and to reduce its extent. Mathematical models remain however the most used method and the most adequate to quantify erosion. RESUMEN Este trabajo aporta los resultados de los datos recogidos relativos a la erosión del agua en el Plateau Central de Marruecos. Se intenta probar la eficiencia del modelo RUSLE para predecir la erosión en los terrenos forestales mediterráneos. El experimento fue realizado en las estaciones forestales de Lalla Regraga y Aïn Guernouch, situadas a una distancia de 50 y 100 km de Rabat. El modelo RUSLE considera la erosión como producto de la acción de la lluvia, la topografía y la vegetación. El modelo fue desarrollado en origen para tierras cultivadas y no ha sido aplicado a áreas forestales de Marruecos. Para verificar la precisión del modelo RUSLE en esta nueva situación, se consideraron dos conjuntos de 5 y 6 puntos de medida y la instalación de una estación climática en cada una de las estaciones consideradas. Estos lugares están caracterizados por un clima semi-árido de inviernos moderados, litología granítica y suelos arenosos en Aïn Guernouch y suelos arcillosos en Lalla Regraga. Ambas regiones muestran una cubierta forestal. Con la finalidad de introducir información procedente de teledetección, hemos analizado la profundidad térmica sobre todo el territorio, utilizando imágenes de temperatura de superficie procedentes del sensor MSG-SEVIRI, para caracterizar el suelo y aportar comparaciones entre otras regiones de Marruecos y España. PALABRAS CLAVE: plateau central, Marruecos, profundidad térmica, lluvia, erosión por agua, RUSLE. ABSTRACT This paper reports the results of data compilation on water erosion in Central Plateau of Morocco. It tries to test the efficiency of the Revised Universal Soil Loss Equation (RUSLE) to predict erosion in Mediterranean forest situations. The experiment was conducted at forest stations of Lalla Regraga and Aïn Guernouch about 50 and 100 km respectively from Rabat, the capital of Morocco. RUSLE model translates erosion as a product of rain erosivity, soil erodibility, topography, vegetation and practices. It was mainly developed for cultivated lands, it was rarely applied to forest areas and never to forests in Morocco. To verify the accuracy of using RUSLE in these situations, two sets of 5 and 6 experimental Wischmeier type plots and a climatic station were installed at the above sited stations. The two experimental sites are characterized by a local semi arid with moderate winter climate, a hydrographic network represented mainly by first order gullies, a lithology showing granite lands with sandy soils at Aïn Guernouch site and schist land with clayey soils in Lalla Regraga site, a deciduous forest in the first site, and a coniferous one in the second site. In order to introduce information coming from remote sensing, we have analyzed the thermal depth over all territory, using MSG thermal images, to characterize the soil and obtain comparison with other regions in Morocco and Spai