Performance de um reservatório no semi-árido paraibano no atendimento à demandas ótimas para irrigação.

Abstract

This work is concerned with the determination and analyse of the reliability, resilience and vulnerability performance indexes for a potential irrigation water demand, which were attained from a nonlinear optimization procedure, to be supplied by the Piranhas reservoir. The reservoir is located at the semiarid region of Paraiba state. A simulation model over a 53 years monthly time series data was used to determine those indexes. The optimal crop area allocation and their water requirements were obtained from a nonlinear optimization model applied to a monthly averaged climatic, agricultural and hydrologic data. The attained indexes were 84,6% for reliability, 29,6 % resiliency and 75,3% for vunerability. Those results are in accordance with the semiarid region reservoirs behavior, that is, when there exists water shortage it may last for a long time period (low resilience) with a great impact (high vulnerability).