| Resume |
These last decades, the exploitation of the
inlands valleys increased considerably in number and
surface because of the fertility of their soils and their
hydromorphycharacter. The present article aims to
analyze the potential in inlands valleys in the south of the
Otibasin pouring. The methodological approach rests on
the semiautomatic method that took in account the
indications of vegetation (NDVI, NDWI, TWI) and the
parameters (slope and accumulation of water) generated
from the pictures Landsat OLI and ASTER DEMS.
Besides the characterization of the inland valley
inventoried has been based on the cutoff
phytogeographical, on the biophysical and socioeconomic
data of the basin. The achieved analysis multi criteria
permitted to estimate the surface of the inlands valleys
identified to 359 894,92 ha is 44,79% of the total surface
of the south part of the Oti basin pouring. About 28698
flexible inlands valley covering a surface of 53 588,06 ha
have been inventoried and represent about 6,67% of the
total surface. Also, it is noted that 6,33% of the surface of
the inlands valley inventoried by the semiautomatic
method, either 42,52% of the potential in flexible inlands
valleys are known by the local authorities of the
Townships of the departments of the Atacora and the
Donga. To the total, three types of inlands valleys came
out again after characterization. It is about the inlands
valleys of the massive atacoriens (BFMA), the inlands
valleys of the wavy peneplain (BFPO) and the inlands
valleys of the gourmaplain (BFPG). The exploitation
rational of these shallows became unavoidable
considering the present necessities and for the future
agricultural perspectives. |