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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 ]. It shows that ], occupied channel width, channel depth and average load quantity increases ]. Load particle size, channel bed roughness and gradient are all characteristics which decrease; it is represented by triangles, of different sizes according to their quantity, facing either towards or away from the mouth or the source of the river ].]		The '''Bradshaw Model''' is a geographical model which describes how a river's characteristics vary between the ''upper course'' and ''lower course'' of a ]. It shows that ], occupied channel width, channel depth and average load quantity increases ]. Load particle size, channel bed roughness and gradient are all characteristics which decrease; it is represented by triangles, of different sizes according to their quantity, facing either towards or away from the mouth or the source of the river ].]

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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 increases downstream. Load particle size, channel bed roughness and gradient are all characteristics which decrease; it is represented by triangles, of different sizes according to their quantity, facing either towards or away from the mouth or the source of the river downstream.File:Http://www.earthstudies.co.uk/Geography/Physical Geography G1/Fieldwork G1/Images of Alderbrook Fieldwork/Bradshaw.gif

The Origins of the Bradshaw Model

The model first appears as an illustration in M J Bradshaws's 1978 high school textbook The Earth's Changing Surface. Bradshaw's illustration is a simplification of Stanley Schumm's river model which had been published a year earlier in The Fluvial System, although aspects of the model had already appeared in a series of academic papers over the previous 10 years. Schumm based his model on an empirical analysis of a variety of North American rivers and suggested that it could be used to predict how any given river channel would respond to changes in discharge or sediment supply caused by river engineering, such as a dam or flood relief channel.

References

- earthstudies.co.uk

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Revision as of 05:31, 11 August 2012 editChrisGualtieri (talk \| contribs)Autopatrolled, Pending changes reviewers, Rollbackers457,369 editsm WP:CHECKWIKI Fixes using AWB ← Previous edit		Revision as of 00:31, 4 September 2012 edit undoBattyBot (talk \| contribs)Bots1,933,611 edits merged templates into Template:Multiple issues & general fixes using AWB (8323)Next edit →
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			{{multiple issues\|
	{{expert-subject\|1=Geography\|date=December 2011}}		{{expert-subject\|Geography\|date=December 2011}}
	{{original research\|date=December 2011}}		{{original research\|date=December 2011}}
	{{too few opinions\|date=December 2011}}		{{too few opinions\|date=December 2011}}
			}}


	The '''Bradshaw Model''' is a geographical model which describes how a river's characteristics vary between the ''upper course'' and ''lower course'' of a ]. It shows that ], occupied channel width, channel depth and average load quantity increases ]. Load particle size, channel bed roughness and gradient are all characteristics which decrease; it is represented by triangles, of different sizes according to their quantity, facing either towards or away from the mouth or the source of the river ].]		The '''Bradshaw Model''' is a geographical model which describes how a river's characteristics vary between the ''upper course'' and ''lower course'' of a ]. It shows that ], occupied channel width, channel depth and average load quantity increases ]. Load particle size, channel bed roughness and gradient are all characteristics which decrease; it is represented by triangles, of different sizes according to their quantity, facing either towards or away from the mouth or the source of the river ].]