This study is part of the project of floodplains delimitation of Medjerda based on remote sensing, specifically the section between Ghardimaou and the dam of Sidi Salem. The watershed studied is located northwest of Tunisia, characterized by an elongated shape. Indeed, morphologically, it is bordered on his sides by high reliefs that prevent the flow of many rivers that converge therefore in the basin.
The soil texture is mainly characterized by a dominance of complex units of soil and not much evolved alluvial contribution soil. Following the flood phenomenon hitting multiple cities around Medjerda during the last century, in this context, our study aims to map and delineate inundated areas by remote sensing method based on Landsat satellite images and supervised classification by ENVI. Remote sensing, GIS and ENVI were enlisted to mapping areas at risk of flooding in the study site. Thus that around 50% of the total area of the zone was touched by the flood of 2003, and around 40% of the total area was affected by the flood of 2010.
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