Viabilidade de projetos de irrigação para o projeto público de irrigação tabuleiros de Russas/CE

Abstract

Because it is a scarce resource, an obstacle for agricultural production, water must be used rationally. The design of efficient irrigation systems can reduce the impacts caused by irrigated agriculture. Therefore, the objective of this work was to evaluate the feasibility of irrigation projects as a function of hydraulic and production characteristics for the Public Irrigation Project – PPI Tabuleiros de Russas in the state of Ceará. The evaluated projects were split into three groups according to the adopted system, where Group 1 is the conventional sprinkler irrigation; Group 2 is the drip irrigation and Group 3 is the micro sprinkler irrigation. The crops evaluated in the experiment were sorghum and pasture for Group 1; melon and watermelon for Group 2; acerola and guava for Group 3. For the execution of this experiment, the edaphoclimatic characteristics were evaluated in the water balance of the crops for the development of the irrigation management. For irrigation projects, the hydraulic design was elaborated for each group and specific crop. The production costs of the assessed crops were estimated. The feasibility of the project was explained using the economic indicators Internal Rate of Return – IRR; Net Present Value – NPV and Return on Investment – Payback. All systems evaluated were viable. The projects with sorghum, watermelon and acerola, corresponding to the projects with conventional sprinkler, drip irrigation and micro-sprinkler irrigation, respectively, showed greater viability among the projects evaluated for the PPI Tabuleiros de Russas/CE.