Hydrological modeling of hydrographic basin in the northeast semiarid region of Brazil

Abstract

The use of hydrological models allows to understand, evaluate and anticipate events of natural or man-made origin in a simpler and more economical way for the quantity and quality of resources in a hydrographic basin. The present work aims to perform a hydrological modeling in the hydrographic basin in the semiarid, using the SWAT model, to verify the influence of the use and exploitation of water production on the land. For this, the SWAT hydrological model (Soil Water Assessment Tool) was used. A study area located in the Jacaré Curitiba Basin, in Poço Redondo-SE, a semi-arid region of the state, inserted in the Caatinga biome and in the lower São Francisco. The adopted methodology was used for bibliographic survey, field work, hydrological monitoring, chemical and physical medicine of soil and soil, survey of land use and exploration, calibration and validation of hydrological model. The SWAT model successfully simulated or hydrographed the flow for the period from Nov/2015 to Jul/2018, duly calibrated and validated. As simulations of different land use scenarios, the greatest production of water in agricultural areas stands out, which can cause greater generation of sediments. The calibrated and validated SWAT model means a possibility for future studies in non-semiarid watersheds and then contributes to studies on water and soil management.

Gestão do Rio Poxim-Açu: um modelo Swat para avaliação de cenários de irrigação

“…O modelo SWAT (Soil and Water Assessment Tool), foi desenvolvido para entender os processos do ciclo hidrológico, prever impactos e avaliar práticas de gestão de recursos hídricos, produção de sedimentos e agroquímicos em bacias hidrográficas, interpretação da variação de uso e ocupação do solo e práticas de gestão durante um longo período de tempo (Neitsch et al, 2005;Sales et al, 2022).…”

Spatial modeling of nitrogen and phosphorus in an agricultural basin in northeastern Brazil

“…In this sense, the spatially distributed soil and water assessment tool, such as the Soil and Water Assessment (SWAT), assist in the adoption of different agricultural practices and the models of non-point sources of use (SWAT) (Andrade et al, 2017, Almeida & Aguiar Netto, 2022, Sales et al, 2022. This model stands out for its ability to directly simulate surface runoff, erosion and sediment production, and nutrient transport in agricultural basins subjected to different managements (Abu-Zreig & Hani, 2021).…”