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O objetivo deste trabalho foi avaliar o comportamento das condicoes hidricas em decorrencia do aquecimento global, analisando a disponibilidade hidrica futura do municipio de Picui.  Para averiguar o comportamento hidrico efetuou-se o calculo do Balanco Hidrico Climatologico segundo o metodo de Thornthwaite e Mather utilizando-se da serie de precipitacao dos anos de 1910 a 2005, coletado pela SUDENE e pela EMATER-PB e de dados de temperatura estimados pelo software Estima-T. Os resultados foram aplicados para as condicoes medias e em seguida usou-se os cenarios de precipitacao mensal (descimento de 10,0% e 20,0%) e de temperatura (acrescimo de 1,0oC e 4,0oC) do IV Relatorio de Avaliacao do Painel Intergovernamental de Mudancas Climaticas (IPCC AR4), para os cenarios extremos de emissao de CO 2 , otimista e pessimista, concomitantemente. Observou-se atraves do balanco hidrico que em condicoes medias ocorre deficiencia hidrica em todos os meses para os casos do balanco hidrico climatologico e para as simulacoes de reducoes de 10 e 20%. Os resultados obtidos tanto para o cenario otimista, quanto o pessimista, indicam situacao critica das condicoes do solo tanto nos recursos hidricos quanto para a pratica de culturas de sequeiro. Os indices pluviometricos nao serao suficientes para varios tipos de culturas, analisando pela vertente do cenario pessimista. Que a condicao para o armazenamento de agua das chuvas fica critica para o consumo humano e animal. Palavras-chave: Mudancas climaticas; Disponibilidade Hidrica; Chuva; Temperatura. Climatic Water Balance, as a Result of Global Warming, in the City of Picui - Paraiba Semiarid ABSTRACT The objective of this study was to evaluate the behavior of water conditions due to global warming, analyzing the future water availability in the city of Picui. To investigate the water behavior is made ​​in calculating the climatic water balance according to Thornthwaite & Mather method using a series of precipitation from year 1910 to 2005, collected by SUDENE and EMATER-PB and temperature data estimated by Estimated-T software. The results were used for conditions in medium and then used to precipitation of the sets (decrease of 10.0% and 20.0%) and temperature (increased by 1.0 ° C and 4.0 ° C) fourth Report the Intergovernmental Panel on Climate Change (IPCC AR4), extreme scenarios for CO 2 emissions, optimistic and pessimistic at the same time. It was observed through the water balance that under average water deficiency occurs in all months for cases and the climatic water balance simulations for reductions of 10 and 20%. The results for both the optimistic scenario, the pessimistic, indicating the critical situation of soil conditions in both water resources and for the practice of rainfed crops. The rainfall will not be sufficient for many types of cultures, analyzing the slope of the pessimistic scenario. That the condition for the storage of rainwater is critical for human and animal consumption. Keywords: Climate change. Water availability. Rainfall. Temperature.

revista brasileira de geografia física

Balanço Hídrico Climatológico, em Decorrência do Aquecimento Global, no Município de Picuí - Semiárido Paraibano (Climatic Water Balance, as a Result of Global Warming, in the City of Picuí - Paraíba Semiarid)