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(Article of periodic en Anglais - 2013)

Document title

Measuring bluff erosion part 2 : pairing aerial photographs and terrestrial laser scanning to create a watershed scale sediment budget

Authors(s) and Affiliation(s)

DAY S.S. (1) ; GRAN K.B. (2) ; BELMONT P. (3) ; WAWRZYNIEC T. (4) ;
(1) Dept. of Geosciences, North Dakota State Univ., Fargo, ETATS-UNIS
(2) Dep. of Geological Sciences, Univ. of Minnesota, Duluth, ETATS-UNIS
(3) Watershed Sciences Dept., Utah State Univ., Logan, ETATS-UNIS
(4) Dept. of Natural and Environmental Science, Western State College of Colorado, Gunnison, ETATS-UNIS

Abstract

The AA. aim to determine the magnitude of erosion from tall bluffs, in the Le Sueur watershed, Minnesota. They coupled analyses of 7 decades of aerial photographs with 4 years of repeat terrestrial laser scanning (TLS) to determine erosion rates on bluffs. Erosion rates from aerial photographs and TLS were extrapolated from 243 and 15 measured bluffs, respectively, to all 480 bluffs in the Le Sueur watershed using multiple techniques to obtain estimates of sediment loading from these features at the watershed-scale. Despite different spatial and temporal measurement scales, the aerial photograph and TLS estimates yielded similar results for bluff retreat rate and total mass of sediment derived from bluffs, with bluffs in the Le Sueur watershed yielding fine sediment. Comparing this value to the average annual total suspended solids (TSS) load determined from gauging from 2000 to 2010, the AA. determined that bluffs comprise 57±16% of the total TSS load, making bluffs the single most abundant fine sediment source in the basin

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, no10 [pp. 1068-1082]

Bibliographic references : 2 p.

Collation : 9 fig., 8 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3359

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