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(Article of periodic en Anglais - 2013)

Document title

Stream power, channel change, and channel geometry in the Blue River, Wisconsin

published at : Changing fluvial systems

Authors(s) and Affiliation(s)

LECCE S.A. (1) ;
(1) Dept. of Geography, Planning and Environment, East Carolina Univ., Greenville, ETATS-UNIS

Abstract

This study examines spatial and temporal changes in channel geometry and stream power in a moderate-sized watershed in the Driftless Area of Wisconsin, USA. Pre-settlement (~1830) channel geometry and stream power estimates derived from General Land Office survey notes were compared with conditions obtained from modern field surveys. Comparison of pre-settlement and modern channels shows that channel width and cross-sectional area have increased considerably during the post-settlement period, producing on average a threefold increase in cross-sectional stream power. When compared to discharge, slope, and bank sediment variables, cross-sectional stream power is more strongly associated with channel shape, explaining a maximum of 47% of the variance in one of the four study reaches. These results are compared with a reanalysis of previously published data from the midwestern USA, in which cross-sectional power also explains more of the variance in channel shape than discharge or bank sediment

Source

Thematical fascicle

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 2013, vol. 34, no 4-5 [pp. 293-314]

Bibliographic references : 3 p.

Collation : fig., tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1080/02723646.2013.847311

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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