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(Article of periodic en Anglais - 2014)

Document title

TerEx Toolbox for semi-automated selection of fluvial terrace and floodplain features from lidar

Authors(s) and Affiliation(s)

STOUT J.C. (1 2) ; BELMONT P. (2) ;
(1) The Univ. of Melbourne, Dept. of Resource Management and Geography, Carlton, AUSTRALIE
(2) Utah State Univ, Dept. of Watershed Sciences, Logan, ETATS-UNIS

Abstract

The AA. introduce a novel tool that accommodates user-defined parameters including, a local-relief threshold selected by a variable-size moving window, minimum area threshold, and maximum distance from the channel to identify and map discrete terrace and floodplain surfaces. They validate the tool in 2 locations where terrace maps were previously developed via manual digitization from lidar and extensive field mapping campaigns. The tool is also tested on 6 different types of rivers to provide examples of starting selection parameters. Generally, the tool provides a high quality draft map of terrace and floodplain surfaces. The AA. find that the tool functions best in catchments where the terraces are spatially extensive, with distinct differences between the terrace and floodplain. The most challenging environments for semi-automated terrace and floodplain mapping include steep catchments with dense riparian vegetation, and very small terraces. They then apply the tool to map terraces and floodplains in the Root River watershed, southeastern Minnesota and generate exceedance plots for terrace heights. These plots provide a first pass analysis to indicate the tributaries and reaches of the river where terraces constitute a significant source of sediment

Source

Article of periodic

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

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

Millesime : 2014, vol. 39, no5 [pp. 569-580]

Bibliographic references : 1 p.

Collation : 9 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.3464

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28518787 : Permanent link - XML version
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