Viabilidade técnica-financeira do aproveitamento de água de chuva para produção de alface-crespa (lactuca sativa l.) No perímetro irrigado de São Gonçalo – PB.

Abstract

The problem of water scarcity is no longer an exclusive problem for the region of the northeastern semi-arid region, in view of the water crisis that occurred in São Paulo between 2014 and 2016. Only 0.75% of the planet’s water is available to the population, so the optimization of this resource is essential for human activity. To this end, this paper aims to analyze the technical and financial feasibility of using rainwater for the production of lettuce (LACTUCA SATIVA L.)by collecting raw water from the shelves of nurseries located on the campus ofInstituto Federal da Paraíba (IFPB) in the city of Sousa-PB. This crop is one of the vegetable species that consume more water than others, and for this reason, it is essential to use, in planning, social technologies such as the empowerment of rainwater. The Brazilian Technical Standard (NBR 15527/2007) presents several methods for the sizing of the rainwater reservoir. In the São Gonçalo unit of the Sousa campus of the Federal Institute of Paraíba there are five nurseries that have the potential to use rainwater and also to produce lettuce, in view of this scenario, this research used these nurseries to verify the viability of rainwater utilization through indicators such as Simple Payback, Discounted Payback, Minimum Attractiveness Rate, Internal Rate of Return and Net Present Value, however, it did not present the desired results for the financial parameters analyzed, even so, the area of nursery shelters provides a sufficient volume captured to suply the water demand for lettuce production-grows in the studied nurseries.