Authors:
Dome TINE
, Mbagnick FAYE
, Mamadou THIOR
, Modou MBAYE
, Landing BIAYE
, Gayane FAYE
and Djibril TINE |
Abstract:
Lower Casamance is characterized by a set of watersheds drained by permanent streams that
flow directly to their mouths. Among these watersheds, we have Kafountine, which, like all
others, participates in the sedimentary morphodynamics of the coastline through the water
erosion that occurs especially upstream, on the slopes. The sediments transported and deposited
are usually composed of fine sands forming accumulations in places that stabilize the beaches.
The objective of this study is to estimate the amount of sediment eroded in the Kafountine
watershed and transported to the coast. To do this, we used the Wischmeier and Smith Universal
Soil Loss Equation (RUSLE) (1978), which is frequently used to calculate the average annual
soil loss per unit of land resulting from slick and channel erosion. The equation is applied after
the data is integrated into a Geographic Information System (GIS). The results from the
overlapping of factors tell us that the Kafountine watershed is losing on average 54.5 t/ha/an |
