COMPARAÇÃO DO DESEMPENHO DE DIFERENTES EQUAÇÕES DE PERDA DE SOLO EM MODELAGEM DISTRIBUÍDA DE GRANDES BACIAS

Código

ENES20200086

Autores

Gabriella Passamani Moreira de Almeida, Lizandra Broseghini Foeger, Diogo Costa Buarque

Tema

11 - MODELAGEM HIDROSSEDIMENTOLÓGICA

Resumo

Soil erosion is a determining factor for soil degradation and can cause several changes in the soil, which is why hydrosedimentological studies are increasingly important. Mathematical models have been widely used to understand the dynamics of sediments in watersheds. The MGB SED is a distributed hydrosedimentological model coupled to the MGB model, which uses the MUSLE equation to calculate sediment production on a daily time scale. In addition to MUSLE, other soil loss equations have potential for these applications. The objective of this work was to compare the performance of the soil loss equations MUSLE, USLE-M and MUST for use in the MGB-SED model modeling, having the Doce River basin as a case study. Results showed that all equations are able to represent the temporal variability of suspended sediments along the Doce River and its sediment dynamics. Despite this, the best statistics were found when using the MUST equation.