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(Article of periodic en Anglais - 2009)

Document title

Spectrally based remote sensing of river bathymetry

Authors(s) and Affiliation(s)

LEGLEITER C.J. (1 2) ; ROBERTS D.A. (1) ; LAWRENCE R.L. (3) ;
(1) Dep. of Geography, Univ. of California, Santa Barbara, ETATS-UNIS
(2) Yellowstone Ecological Research Center, Bozeman, ETATS-UNIS
(3) Dep. of Land Resources and Environmental Sciences, Montana State Univ., Bozeman, ETATS-UNIS

Abstract

This paper evaluates the potential for remote mapping of river bathymetry by (1) examining the theoretical basis of a simple, ratio-based technique for retrieving depth information from passive optical image data; (2) performing radiative transfer simulations to quantify the effects of suspended sediment concentration, bottom reflectance, and water surface state; (3) assessing the accuracy of spectrally based depth retrieval under field conditions via ground-based reflectance measurements; and (4) producing bathymetric maps for a pair of gravel-bed rivers from hyperspectral image data. The application of a simple algorithm, called optimal band ratio analysis (OBRA) to hyperspectral image data resulted in spatially coherent, hydraulically reasonable bathymetric maps, though negative depth estimates occurred along channel margins where pixels were mixed. This study indicates that passive optical remote sensing could become a viable tool for measuring river bathymetry

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. 1039-1059]

Bibliographic references : 1 p.

Collation : 11 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1787

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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