Geotecnologias para o mapeamento temático dos índices de aridez e classes de desertificação na microrregião de Umbuzeiro-PB.

Abstract

The aridity index (AI) is widely used in studies for the determination of dry areas and especially in studies of desertification. This work aimed to promote the use of geotechnology for thematic mapping of drought and subsequent desertification classes indices to show the relationship and dynamic spatiotemporal in microregion of Umbuzeiro-PB. The final maps corresponding to the IA's and desertification classes were developed using the Software Surfer 10. The municipality of Umbuzeiro presented the best AI among all the micro-region. In 2015, all municipalities had a significant decrease in IA for all the years studied, however, that Natuba year stood out when compared to other municipalities in the micro-region. Possibly the low rainfall, high temperatures and the local topography directly influence the AI micro-Umbuzeiro, as well as climate phenomena as ENSO example.