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(Article of periodic en Anglais - 2011)

Document title

Oxbow lakes as indicators of river channel change : Leaf River, Mississippi, USA

published at : The physical geography of medium-sized rivers, focusing on the Southeastern and South-Central United States. Part II

Authors(s) and Affiliation(s)

RASMUSSEN J. (1) ; MOSSA J. (1) ;
(1) Dep. of Geography, Univ. of Florida, Gainesville, ETATS-UNIS

Abstract

This study uses oxbow lakes to ascertain the extent and nature of change in a river's form, focusing on the effects of post-1950s floodplain gravel extraction on the geomorphology of the Leaf River in southeastern Mississippi, USA. Data from 12 cross-sections suggests that the present-day river is 35% wider and 12% shallower than the cross-sectional geometry in cutoffs that pre-date 1955. Field measurements reveal that the Leaf River was relatively stable from at least 1911 to the early 1940s, but has since undergone an average of 2.65 m of degradation in the study reach. Survey data from a nearby USGS stream gage show that degradation began abruptly in the mid 1970s, most likely as a result of in-stream mining and pit avulsions on a major tributary that deprived downstream areas of bed load and created profile adjustments

Source

Thematical fascicle

published at : Physical geography / ISSN 0272-3646

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

Millesime : 2011, vol. 32, no 6 [pp. 497-511]

Bibliographic references : 29 ref.

Collation : fig., tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.2747/0272-3646.32.6.497

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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