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Abstract
Hydro-sedimentological models might be useful tools for investigating the effectiveness of soil and water conservation practices. However, evaluating the usefulness of such models requires that predictions are tested against observational data and that uncertainty from model parameterization is addressed. Here we aimed to evaluate the capacity of the SWAT model to simulate monthly streamflow and sediment load in the Posses creek catchment (12 km2), Southeast Brazil. The SUFI-2 algorithm from SWAT-CUP was applied for calibration, testing, uncertainty, and sensitivity [...]
Highlights
Soil erosion is the main cause of land degradation in agricultural catchments in tropical countries (Lal, 2001)
This study aimed to evaluate the capability of the Soil and Water Assessment Tool (SWAT) model to estimate monthly streamflow and sediment load for a headwater catchment in Southeast Brazil, which is part of the Water Conserver program
The Posses catchment was sub-divided into 25 sub-catchments and 138 hydrological response units (HRUs) during the SWAT model setup
Summary
Soil erosion is the main cause of land degradation in agricultural catchments in tropical countries (Lal, 2001). Negative on-site erosion effects include the loss of nutrients, seeds, organic matter, and biodiversity. Greater emphasis has been given to on-site erosion model-based assessments, to the detriment of sediment transport and deposition and its effects on water supply. In Brazil, hydro-sedimentological modeling studies are scarce, due to the lack of hydro-meteorological and -sedimentological data (Bonumá et al, 2014; Bressiani et al, 2015). This difficulty is relevant for small headwater catchments (e.g.,
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