ABSTRACT

This chapter reviews some of the models which have attempted to link geomorphic and hydrologic processes more closely, and proposes some alternative models which take account of hillslope flow measurements and can be applied to small catchments. The non-linearity of the rating curve has been considered by R. A. Wooding who has shown that the kinematic wave solution to the flow equation is applicable to most overland hillslope flows. For simplicity, spatially uniform rainstorms and uniform hillslopes are assumed, such that all slopes provide the same water contributions over time. Hillslope contributions to the channel are routed downstream at the flow velocity, adding lateral channel-bank contributions and summing the elements of streamflow downstream from network junctions. Rain falling on the land produces a stream hydrograph by first flowing over and through the soil, and secondly along a network of discrete channelways.