The role of automatic cartography In tracking of the geomorphological risk in the western High Atlas Basin: case of Ourika watershed

Abstract

Moroccan moutains get more focus on the national level, as well as its biodiversity, and their natural, cultural and historical heritage. Nevertheless, they often faced difficult challenges that exhaust their energy and deepen their isolation and fragility.The western High Atlas Mountains with their biologically diverse basins and geomorphology aren't immune to these challenges. The most prominent and widespread are the geomorphological risks associated with external geodynamics. About 80000 km² of the High Atlas area is subject to erosion, equivalent to 24 million tons. On the other side, this type of risk is rarely noticed because it results from a slow and complex dynamic, in which geomorphological and biomechanical factors overlap. For this, we tried to address this research, and stand in the details in the mountain's part of the Ourika basin of the Western High Atlas, relying on automated cartography as a tool to know the dimension of the risk of landslides. Through the development of a set of thematic and authoritative maps using various GIS programs, In order to dismantle components and domain variables As an aid or impediment to the possibility of a series of landslides And individual movement of materials in Ourika basin