Instabilidade pluviométrica nos municípios de Paraipaba, Trairi, Acaraú e Itarema e seus possíveis efeitos na agricultura

Abstract

The brasilian semi arid always was seen as a miserable place because of big dry that ravage this region. This study scale the rainfall instability and the agricultural production on four county of the State of Ceara who are: Paraipaba, Trairi, Itarema and Acaraú, the culture types analyzed was Bean, Corn, Manioc and Coco. The level of instability was mensured by variation coefficient (VC), where was compared the instability and rainfall average of the county with the of Ceara, already concerning the culture types surveyed was compared the average and the instability of acreage, production value and produced amount by hectare at period of normality, rainy and drought period. It was verified that surveyed county had higher rainfall average than State of Ceara, of wich, Paraipaba was the only one smaller than State. On surveyed culture types, Coco and Manioc presented better instability, especially at dry and normality periods, while types like Bean and Corn presented very high instability.