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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - A framework for testing large-scale distributed soil erosion and sediment delivery models
T2 - Dealing with uncertainty in models and the observational data
AU - Batista, Pedro V.G.
AU - Laceby, J. Patrick
AU - Davies, Jessica
AU - Carvalho, Teotônio S.
AU - Tassinari, Diego
AU - Silva, Marx L.N.
AU - Curi, Nilton
AU - Quinton, John N.
PY - 2021/3/31
Y1 - 2021/3/31
N2 - Evaluating distributed soil erosion models is challenging because of the uncertainty in models and measurements of system responses. Here, we present an approach to evaluate soil erosion and sediment delivery models, which incorporates sediment source fingerprinting and sediment-rating curve uncertainty into model testing. We applied the Generalized Likelihood Uncertainty Estimation (GLUE) methodology to the Sediment Delivery Distributed model (SEDD) for a large catchment in Southeast Brazil. The model was not rejected, as 23.4% of model realizations were considered behavioral. Fingerprinting results and SEDD simulations showed a partial agreement regarding the identification of the main sediment sources in the catchment. However, grid-based estimates of soil erosion and sediment delivery rates were highly uncertain, which restricted the model's usefulness for quantifying sediment dynamics. Although our results are case-specific, similar levels of error might be expected in erosion models elsewhere. The representation of such errors should be standard practice.
AB - Evaluating distributed soil erosion models is challenging because of the uncertainty in models and measurements of system responses. Here, we present an approach to evaluate soil erosion and sediment delivery models, which incorporates sediment source fingerprinting and sediment-rating curve uncertainty into model testing. We applied the Generalized Likelihood Uncertainty Estimation (GLUE) methodology to the Sediment Delivery Distributed model (SEDD) for a large catchment in Southeast Brazil. The model was not rejected, as 23.4% of model realizations were considered behavioral. Fingerprinting results and SEDD simulations showed a partial agreement regarding the identification of the main sediment sources in the catchment. However, grid-based estimates of soil erosion and sediment delivery rates were highly uncertain, which restricted the model's usefulness for quantifying sediment dynamics. Although our results are case-specific, similar levels of error might be expected in erosion models elsewhere. The representation of such errors should be standard practice.
KW - GLUE
KW - RUSLE
KW - SEDD
KW - Sediment fingerprinting
KW - Sediment loads
KW - Soil erosion models
U2 - 10.1016/j.envsoft.2021.104961
DO - 10.1016/j.envsoft.2021.104961
M3 - Journal article
AN - SCOPUS:85099581886
VL - 137
JO - Environmental Modelling and Software
JF - Environmental Modelling and Software
SN - 1364-8152
M1 - 104961
ER -