Oumar Sy’s scientific contributions

Built in border of the river Casamance, from the district Stopover, the city of Ziguinchor is forced by this river and its tributaries to evolve only by the South. With a rate of natural growth of 4,9 % on average a year, for a population of 153 608 inhabitants in 2000, a surface of 4450 ha turns out exigüe for a city in which the constructions are, for the main part, in the horizontal. Today, the context of insecurity makes that the main part of villages, the theaters of operations military and situated in the South of the city have their population in the outskirts of the city. To repair the injustices having pulled the conflict, the State and his partners in the development invest in the region. The renewed interest for the region and the city in particular arises in a context of strong land pressure in the municipality. The only possibility of spatial extension can be made only southward, against the rural community of Niaguis. The conversations realized with the various actors of the city and the observations of ground indicate a spatial evolution directed to the south periphery. His rural features kept for a long time so strengthen the land stakes and the landscaped transformations, through the regression of the agricultural spaces for the benefit of houses. Where from, for the political authorities, the necessity of a positive segregation in the coverage of the recently expressed social requests and the implementation of an instrument of urban planning is imperative for a better control of the land dynamics.