IGB

Connexion

(Article of periodic en Anglais - 2013)

Document title

Channel–floodplain connectivity during an extreme flood event : implications for sediment erosion, deposition, and delivery

Authors(s) and Affiliation(s)

CROKE J. (1) ; FRYIRS K. (2) ; THOMPSON C. (3 1) ;
(1) Australian Rivers Inst., Griffith Univ., Queensland, Nathan, AUSTRALIE
(2) Dept. of Environment and Geography, Macquarie Univ., Sydney, AUSTRALIE
(3) Integrated Center for Catchment Management (ICaM), Australian National Univ., Acton, AUSTRALIE

Abstract

The term connectivity is emerging as an innovative component of catchment erosion modeling studies. However, considerable confusion remains regarding its definition and quantification. The catastrophic flood of January 2011 in the Lockyer valley, southeast Queensland, Australia provides an opportunity to examine the connection between channels and floodplains and to determine how these dynamics operate under high flow regimes. High resolution aerial photographs and multi-temporal LiDAR digital elevation models (DEMs), coupled with hydrological modeling, are used to assess both the nature of hydrologic and sedimentological connectivity and their dominant controls. Longitudinal variations in flood inundation extent led to the identification of 9 reaches which displayed varying channel–floodplain connectivity. The results highlight the need to carefully consider non-linear changes in key variables such as channel capacity and flood conveyance in the development of a quantitative "connectivity index"

Source

Article of periodic

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

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

Millesime : 2013, vol. 38, no12 [pp. 1444-1456]

Bibliographic references : 2 p.

Collation : 11 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3430

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