WaTEM/SEDEM is a soil erosion and sediment delivery model used for catchment-scale simulations. The model incorporates a Revised Universal Soil Loss Equation (RUSLE) module to simulate gross erosion, extended with a spatially explicit sediment routing module to simulate sediment transport based on a cellular transport capacity. The model therefore provides the user with estimations of gross and net soil erosion at the catchment scale. WaTEM/SEDEM has been applied for numerous applications considering both the on-site and off-site impacts of soil erosion. These applications include the predicted soil loss from fields, off-site deposition, estimations of catchment sediment yield. The model has also been extended for the simulation of transported heavy metals, nutrients, organic carbon and runoff (CN). The default application of the model can be extended in several ways to simulate the impact of soil erosion mitigation measures in a spatially explicit way. For example, additional options within the model allow for the consideration of other anthropogenic factors such as roads, sewage systems, water and sediment buffer basins, dams and ditches. Version 5.0.3 was created to integrate following improvements: Bugfix when working with utm grids Add checks on min/max coordinates when using latlon grids Improving documentation Adding more debugging information via adr2line

When using WaTEM/SEDEM, reference should be provided to the current model code on github and to the following publications: Van Oost K, Govers G, & Desmet PJJ, 2000. Evaluating the effects of changes in landscape structure on soil erosion by water and tillage. Landscape Ecology 15 (6), 579-591. https://doi.org/10.1023/A:1008198215674 Van Rompaey A, Verstraeten G, Van Oost K, Govers G & Poesen J, 2001. Modelling mean annual sediment yield using a distributed approach. Earth Surface Processes and Landforms 26 (11), 1221-1236. https://doi.org/10.1002/esp.275 Verstraeten G, Van Oost K, Van Rompaey A, Poesen J & Govers G, 2002. Evaluating an integrated approach to catchment management to reduce soil loss and sediment pollution through modelling. Soil Use and Management, 18, 386-394. https://doi.org/10.1079/SUM2002150 The model code can be cited as: Verstraeten, G., Govers, G., Van Oost, K., Van Rompaey, A., Notebaert, B., Van de Wauw, J., Renders, D., Gobeyn, S., Van Hoey, S., De Vleeschouwer, N., Callewaert, S., & Deproost, P. (2024). watem-sedem/watem-sedem: 5.0.3 (5.0.3). Zenodo. https://doi.org/10.5281/zenodo.10997287