FIGUEREDO, M. L.; http://lattes.cnpq.br/8369029473329643; FIGUEREDO, Mariana Lima.
Résumé:
Cultivated throughout the Irecê-Ba microregion, bean production in the period from
1960 to 1990 was the main source of economic development. With the growing
expansion of cultivation and the demand for arable land, deforestation became a
frequent activity, consequently, over time, it was believed that there was an instability
in the rain regime of the region, causing the municipality to stop exporting the dryland
beans, and to produce other crops through irrigation. Thus, the present study aims to
identify the impacts on the local climate of the Irecê microregion caused by land use
change, using non-parametric statistics and remote sensing. The methodology
involved the application of regression analysis and non-parametric statistical test of
Pettit for the historical series (1944 to 2017) of the municipality of Irecê, also the use
of remote sensing was used to determine a possible increase in the deforested area
through and to establish the level of susceptibility to desertification of the study area,
through the climatic condition. Where it was possible to observe a great temporal
variability in the vegetation and precipitation, besides a tendency in the reduction in
the quantity of precipitated rains and a non statistically significant rupture in the
climatological series of precipitation. It can be concluded that the monoculture
production of the bean until the 90s and the inadequate management of the soil
resulted in a change in the water regime, including a trend towards desertification.
