Main limitation of ' bucket MI method is that it does not factor in catchment hydrological processes: PRECIPITATION EVAPORATION overland flow: infiltration throughflow processes are topographIc Surface own ally driven glacier- INFILTRATION spatial modelling of these processes requires a suit- ably scaled digital elevation model (DEM) GROUNDWATER BASEFLOW Water shed hydrology: the passage of precipitated water through vegetation cover, soil and rock to the stream. Precipitation falls over the whole watershed and is concentrated in stream channels NB Focus here on humid, erosional landscapes, not dry depositional landscapesWater shed hydrology: the passage of precipitated water through vegetation cover, soil and rock to the stream. Precipitation falls over the whole watershed and is concentrated in stream channels. • Main limitation of ‘bucket’ MI method is that it does not factor in catchment hydrological processes: overland flow; infiltration; throughflow processes are topographic￾ally driven spatial modelling of these processes requires a suit￾ably scaled digital elevation model (DEM) NB Focus here on humid, erosional landscapes, not dry depositional landscapes