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The Bradshaw Model is a geographical model which describes how a river's characteristics vary between the upper course and lower course of a river. It shows that discharge, occupied channel width, channel depth and average load quantity increase downstream. Load particle size, channel bed roughness and gradient are all characteristics that decrease. This is represented by triangles; an increase in the size of a triangle represents an increase in the variable. In general, the model mimics the characteristics of most rivers, therefore the model is usually used in order to compare natural rivers to concepts laid down by the model.
References
- http://www.geography-fieldwork.org/rivers/river-variables.aspx
- earthstudies.co.uk