A captação da água de chuva para regularizar a vazão de irrigação da agricultura familiar.

Abstract

The relevant attention given to water resources is the result of a high degree of dependence on living beings by water. In view of the difficulties related to the water availability of the Brazilian Northeast, the development of research that enriches the means of living with the rainfall characteristics of this region of the country is of growing importance. The present research presents a technically efficient and economically viable model to make use of rainwater for use in the familiar cultivation of coriander in the Várzea Comprida dos Oliveiras Community, Pombal-PB. Based on historical local rainfall data, the components required for rainwater harvesting and storage were determined to ensure permanent daily water availability for coriander irrigation. The present case study shows that for a 10 m² coriander crop there is a need for a 3.3 m³ volume reservoir to ensure daily rainwater supply only throughout the year. As far as economic viability is concerned, the extra expense related to the construction of rainwater infrastructure pays off after 1 year and 4 months without using water transport by water tanker.