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A Mapping Analysis to Explain Vegetation Evolution in Lake Debo and Walado Debo

	International Journal of Scientific Research and Engineering Development (IJSRED)	Full Text:
	Published Issue : Volume-3 Issue-6
	Year of Publication : 2020
	Unique Identification Number : IJSRED-V3I6P53
	Authors : Forokoro Kone, Mouneri Maiga, Mohamed S. Maiga
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Abstract :

The evolution of the grasslands of Lake Débo and Walado Débo is in perpetual progression according to the hydrological cycles of high or low floods. Since 1969 the trend is towards the degradation of flooded grassland. The changes in floristic composition and the distribution in time and space have not yet been elucidated. The main objective of this study is to understand the evolution of plant formations as much as possible, through analysis of existing maps, in order to help decision-makers and the population in their plan for the sustainable management of the water resources of Lake Débo and Walado Débo. The method establishes a link between the hypotheses proposed by Jean Gallais regarding the evolution of the vegetation and the current situation of this vegetation, on the basis of mapping analysis and GPS surveys. The results of the mapping analysis corroborate a large part the hypotheses formulated in 1977 by J. Gallais on the evolution of plant formations. The useful information from this analysis is the destruction of vetiveraies. The vetiveraies were used as natural barriers to protect floodplains, ponds and the lake bed from erosion and silting. It is an environmental problem that can be remedied by regenerating.