IGB

Connexion

(Article of periodic en Anglais - 2009)

Document title

Elevation adjustments of paired natural levees during flooding of the Saskatchewan River

Authors(s) and Affiliation(s)

SMITH N.D. (1) ; PÉREZ-ARLUCEA M. (2) ; EDMONDS D.A. (3) ; SLINGERLAND R.L. (3) ;
(1) Dep. of Geosciences, Univ. of Nebraska, Lincoln, ETATS-UNIS
(2) Dep. de Geociencias Marinas, Fac. de Ciencias, Univ., Vigo, ESPAGNE
(3) Dep. of Geosciences, Penn State Univ., Univ. Park, Pennsylvania, ETATS-UNIS

Abstract

The summer 2005 flood of the Saskatchewan River (Cumberland Marshes, east-central Saskatchewan) inundated large areas of floodplain for up to seven weeks, forming prominent new deposits on natural levees along main-stem channels. Measurements of flood-deposit thickness and crest heights of 61 levee pairs show that the thickest deposits occur on the lower pre-flood levee in 80% of the sites, though no clear relationship exists between deposit thickness and magnitude of height difference. Supplemental observations from tank experiments indicate that during near-bankfull flows, temporally and spatially variable deposition and erosion occur on levees due to backwater effects associated with nearby channel bars and irregular rises of the channel bed forced by channel extension. During floods, preferential deposition in lows tends to even out crest heights

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2009, vol. 34, no8 [pp. 1060-1068]

Bibliographic references : 1 p.

Collation : 8 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1792

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
Refdoc record number (ud4) : 22359929 : Permanent link - XML version
Powered by Pxxo