Simulation models of catchment hydrology: many deterministic and empirical models all model water flow in the catchment as a function of: 1. Topographic characteristics and 2 Soil characteristics Highly parametrised models(eg. CSIRO 'Topog difficult to 'runor implement across landscapes due to lack of required spatial data Therefore' simple'models are“ popular”• Simulation models of catchment hydrology: - many deterministic and empirical models - all model water flow in the catchment as a function of: 1. Topographic characteristics and 2. Soil characteristics - Highly parametrised models (eg. CSIRO ‘Topog’) difficult to ‘run’ or implement across landscapes due to lack of required spatial data - Therefore ‘simple’ models are “popular