Spatial dynamics of rainfall erosivity in the Taperoá river basin, semiarid region of Paraíba

Jadson dos Santos Maciel, Rafael Albuquerque Xavier

Abstract


The rainfall by rainfall erosivity is the natural element that participates more actively in soil erosion because the rain is the main factor that causes the landscape modeling and must be studied to obtain information about the intensification of the process erosion. In general, if all other factors are held constant the only variable in time and space scales are the rains making the loss of soil proportional to rainfall erosivity. Before it was necessary to evaluate the potential of rainfall erosivity in the Taperoá River basin (SBHRT), describing the spatial and temporal, which is the main objective of this work. 22 posts rainfall data were used, obtained from the DCA / UFCG site, and from them we determined the erosivity factor. Through geoprocessing tools have been created maps that showed the spatial and temporal variability of rainfall and its erosivity. All analyzes were worked through Qgis 2.14 software, and through interpolation techniques were generated maps that show the erosive potential of the basin. The results show that the SBHRT an irregular seasonal distribution of rainfall erosivity with a peak in March and April; generally the sub-basin has a high and medium erosive potential and consequently high potential for soil loss by erosion, especially in the western sector where the erosive potential is considered very high and high.

 


Keywords


erosivity; rainfall; semiarid.

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DOI: https://doi.org/10.29150/jhrs.v6i4.22753

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