Name: Anthony Fabriz Marchesi
Type: MSc dissertation
Publication date: 27/02/2020

Namesort descending Role
Antonio Sérgio Ferreira Mendonça Advisor *

Examining board:

Namesort descending Role
Antonio Sérgio Ferreira Mendonça Advisor *
José Antônio Tosta dos Reis Internal Examiner *
Marco Aurélio Costa Caiado External Examiner *

Summary: 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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