Ettien Yah Carine, Toure Mamadou, Yao Koffi Blaise, Yao Kouassi Serge Aristide, Ebe Aloua Estelle Danielle and Kouame Koffi Fernand
Abstract
Variation in land use and morphometric parameters play an important role in the hydrological behavior of a watershed. The aim of our research was to analyze environmental parameters in Doropo Department. Spatio-temporal dynamics of land use were assessed using multi-date satellite data. The âmaximum likelihoodâ classification algorithm was used. The physical parameters of the regionâs watersheds were characterized through a morphometric study. The results of the spatio-temporal dynamics identified the transition from a natural to an anthropized zone over a period of thirty-six years (1986 to 2022). This reveals a significant spatial expansion of grassy savannah units (1.3%), bare soil/habitats (2.8%) and crops/fallow (5.4%). There was also a decrease in the forest/gallery environment (5.1%), irrigated crops (5.6%) and water (2.8%). Statistical analysis of morphometric parameters revealed poorly drained watersheds (1.96 to 2.04 km-1) and extremely long water concentration times (2 to 3 days). Analysis of the results obtained shows that the department is subject to runoff. This study shows a qualitative link between environmental parameters and runoff.