ABSTRACT
A model of hillslope hydrology is described that attempts to simulate a variety of different runoff production mechanisms in a way that takes account of both hillslope form and the spatial variability of soil characteristics. The model has been designed to reflect the essence of physically based theory but is computationally very simple, so that it can be used to explore the effects of hillslope runoff production on flood frequency characteristics by means of Monte Carlo simulation. Storm period calculations are carried out using an hourly time step, and interstorm period calculations are performed using analytical equations that include the effects of unsaturated zone drainage and evapotranspiration losses. A number of 100-year simulations are described representing runoff production on a single catchment topography with a variety of soil and climatic conditions.
