GIS and DEMs are key sources of information to establish the boundaries of the basin, land-use land cover. They are integral to the process of sediment modelling as the process is best viewed on a GIS platform such as ArcGIS or QGIS. Sediment models use input data such as GIS data, Land use Land Cover Maps and information in tables - to present outputs such as the sediment load delivered to the stream and sediment retained by vegetation and topographic features.