WestminsterResearch will not be accepting deposits until 9th March 2015. This is to allow for a system upgrade and server migration.

Channel aggradation below Chew Valley Lake, Somerset, U.K.

Petts, Geoffrey E. and Thoms, Martin C. (1986) Channel aggradation below Chew Valley Lake, Somerset, U.K. Catena, 13 (3). pp. 305-320. ISSN 0341-8162

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/0341-8162(86)90005-6


Variations of channel substrate composition are described for a regulated river which has experienced channel change since dam completion. Sediment samples were obtained using bulk (grab) sampling and freeze-coring. Data derived from the two methods are shown to differ. Bulk-sample data describe the bed surface layer; its grain-size variations are related to bedform. Freeze-core data describe the sub-surface structure and the fine size-grades. The gravel framework-supported substrate of the control reaches constrasts with the sand-dominated substrate of the aggraded reach, although in both cases the substrate coarsens upwards. In the former this relates to the development of a sand matrix within the gravel-framework substrate, and in the latter, sand-bed channel, to the progressive addition of a gravel component towards the surface which is related to the process of channel change. At the local-scale, bedform is shown to exert an important control on the character of substrate change induced by flow regulation.

Item Type:Article
Research Community:University of Westminster > Life Sciences, School of
ID Code:9144
Deposited On:17 Feb 2011 12:00
Last Modified:17 Feb 2011 12:00

Repository Staff Only: item control page