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| {{short description|Geographical model of river characteristics}} | |||
| {{One source|date=September 2012}} | |||
| 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 ], occupied channel width, channel depth and average load quantity is constant downstream. <ref>http://www.geography-fieldwork.org/rivers/river-variables.aspx</ref> Load particle size, channel bed roughness and gradient are all characteristics that remain constant; it is represented by triangles, of different rivers which fit the model perfectly therefore the model is usually used in order to compare natural rivers to concepts laid down by the model. <ref>earthstudies.co.uk</ref> The Bradshaw model also does not apply above the latitude of Saint-Hyacinthe, Quebec and below the latitude of Singapore. | |||
| The '''Bradshaw Model''' is an idealised ] model which suggests how a river's characteristics vary between the '']'' and '']'' of a river. It indicates how ], occupied channel width, channel depth, and average load quantity increase downstream,<ref>{{Cite web|url=https://www.geography-fieldwork.org/rivers/river-variables.aspx|title=Models of downstream change|website=Geography Fieldwork|publisher=]|archive-url=https://web.archive.org/web/20160513161314/https://www.geography-fieldwork.org/rivers/river-variables.aspx|archive-date=May 13, 2016|url-status=}}</ref> and other properties such as load particle size, ] roughness, and gradient as characteristics that decrease. These features are represented by triangles; an increase in the size of a triangle represents an increase in the variable. Generally the Bradshaw model shows the characteristics expected to be present in a river, but due to the nature of rivers and the ever-changing environment in which they exist, not all rivers assimilate to the model. Therefore, the model is often applied to compare natural rivers against ideal rivers that fit the model perfectly.<ref>earthstudies.co.uk</ref> | |||
| ==References== | ==References== | ||
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| {{Rivers, streams and springs}} | |||
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Latest revision as of 06:13, 30 October 2023
Geographical model of river characteristicsThe Bradshaw Model is an idealised geographical model which suggests how a river's characteristics vary between the upper course and lower course of a river. It indicates how discharge, occupied channel width, channel depth, and average load quantity increase downstream, and other properties such as load particle size, channel bed roughness, and gradient as characteristics that decrease. These features are represented by triangles; an increase in the size of a triangle represents an increase in the variable. Generally the Bradshaw model shows the characteristics expected to be present in a river, but due to the nature of rivers and the ever-changing environment in which they exist, not all rivers assimilate to the model. Therefore, the model is often applied to compare natural rivers against ideal rivers that fit the model perfectly.
References
- "Models of downstream change". Geography Fieldwork. Field Studies Council. Archived from the original on May 13, 2016.
- earthstudies.co.uk