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Results from a new model of river basin evolution
Authors:Garry Willgoose  Rafael L Bras  Ignacio Rodriguez-Iturbe
Abstract:This paper briefly describes a model of the erosional development of catchments and their channel networks. The model differentiates between the dominant transport processes in hillslope and channels. The development of channels and hillslopes occurs in an integrated manner as a function of physically observable mechanisms. The growth of a river basin is qualitatively described. The model concepts are used to study the basin during periods of growth (transient periods), as well as during dynamic equilibrium. This leads to hypotheses about the relationship between slopes, relief, tectonic uplift, erodability, runoff, and catchment area. It is shown that the model leads to very reasonable and desirable behaviour of hillslopes during retreat and degradation.
Keywords:Fluvial geomorphology  River basin growth  Channel networks  Mathematical models of basins  Dynamic equilibrium
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