Análise da aplicação das modelagens EUPS e SWAT na identificação de áreas prioritárias para intervenções conservacionistas do solo em bacias hidrográficas
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Data
2020-02-27
Autores
Marchesi, Anthony Fabriz
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Universidade Federal do Espírito Santo
Resumo
Soil loss, caused by water erosion, generates financial and social impacts through soil productive capacity reduction, besides impacts to the environment by excessive sediments and nutrients inputs. The objective of this study is to analyze the USLE equation and SWAT modeling to identify priority areas for soil conservation in the Upper and Middle Santa Maria da Vitória River Basin. The SWAT was hydrologically calibrated, and later applied to obtain sediment generation for each sub-basin in study area. The application of USLE used geographic information system to obtain the average of pixels inserted into each sub-basin, previously defined by SWAT. Estimates made by USLE indicated priority areas for intervention in the upper third part, while SWAT application indicated largest sediment generation in the watershed central part. Results analysis indicated that the main reason for values estimated by USLE is related with the C factor, that corresponds to land use. With respect to SWAT applications results, the main cause is related with simulated runoff, in addition to land use. Therefore, attention should be given to the purpose of each model, USLE is used for average soil loss estimation, and SWAT for estimation of sediments generated and carried during hydrological events.
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Erosão , perdas de solo , EUPS , SWAT , MUSLE