Análise da escassez hídrica relacionada à variabilidade climática no Cariri Paraibano.

Abstract

Brazil's Northeast region, especially in semi-arid portion periodically is affected by the occurrence of droughts with partial or total losses in the agricultural sector, which is almost subsistence. To carry out this study rainfall data were selected registered in rainfall stations generated by SUDENE and AESA, between the period 1940 to 2014. It was using position measurements and dispersion, graphical analysis and identified the relative influence of the presence of events El Niño and La Niña. To analyze the interaction man / environment used the geoenvironmental theory Geosystems. The results show that in the analyzed period there was a higher incidence of normal years, where the rainfall recorded was on average, which is around 400 mm / year, and La-Niña event, where the rainfall exceeds this volume, reaching 1300 mm / year, as the county of Taperoá (Western Cariri). And the results indicate that the Eastern Cariri has a water deficit, when related to Western Cariri, this is due among other factors, the altitude and orographic position to windward of the micro-region.