A influência da variabilidade pluvial na agricultura irrigada nas várzeas de Sousa/PB

Abstract

The Irrigated Perimeter Várzeas de Sousa (IPVAS) is located between two cities: Aparecida and Sousa , both in the state of Paraíba . Its water supply is sourced from the Curema and Mãe d'Água reservoirs through the Redenção canal, such structure is a constituent part of the Piancó sub basin. It is noteworthy that the agricultural and rainfall context of this location is integrated into two regions of Paraíba commonly interconnected: Alto Sertão and Semiárido, which have a significant rainfall variability. Despite this, they possess, with appropriate adaptations, a strong potential for agro economic development, differently from what is popularly asserted about Semiárido and its climatic predispositions to social and economic collapse. This research examined the relationships between rainfall mechanisms (ENSO and Dipole), water variables, and the production of green coconut and pacovan banana in the IPVAS. For analysis, the rainfall data from 1994 to 2022, the occurrences of the El Niño Southern Oscillation and the Tropical Atlantic Dipole phenomena, and the agricultural production quantities of two fruits from 2012 to 2022 were utilized. After compilation, the values underwent descriptive statistics, Quantile technique, Simple Linear Correlation, and Pearson Coefficient. It was observed that rainfall in the Piancó sub basin has a moderate relationship with the volume of the Curema/Mãe d'Água Complex. Regarding the capacity of the Curema and Mãe d'Água reservoirs and the production of green coconut and pacovan banana in the IPVAS, there was a moderate interconnection. On the other hand, the production of the two fruits and the rainfall regi me of the cities around that sub basin behaved at very weak levels for interferences. Considering this, it is important to emphasize that climatic elements alone are not solely responsible for the increase or reduction of agricultural activities in the IPV AS. Therefore, the existence of other influencing variables is evident, including flexible planning, land/plot division, financial investments, inputs, tools, techniques employed, anthropogenic actions in the environment, and political issues. In brief, hu man interventions driven by the capitalist market system.