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(Article of periodic en Anglais - 2008)

Document title

Spatial prediction of river channel topography by kriging

Authors(s) and Affiliation(s)

LEGLEITER C.J. (1 2) ; KYRIAKIDIS P.C. (1) ;
(1) Dept. of Geography, University of California, Santa Barbara, ETATS-UNIS
(2) California Dept. of Water Resources, Fresno, ETATS-UNIS

Abstract

Using survey data from a restored gravel-bed river, the AA. demonstrate how transformation to the channel-centered coordinate system facilitates interpretation of the variogram, a statistical model of reach-scale spatial structure used in kriging, and how the choice of a trend model affects the variogram of the residuals from that trend. Similarly, the AA. show how decomposing kriging predictions into their trend and residual components can yield useful information on channel morphology. Cross-validation analyses involving different data configurations and kriging variants indicate that kriging is quite robust and that survey density is the primary control on the accuracy of bed elevation predictions. The root mean-square error of these predictions is directly proportional to the spacing between surveyed cross-sections, even in a reconfigured channel with a relatively simple morphology; sophisticated methods of spatial prediction are no substitute for field data

Source

Article of periodic

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

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

Millesime : 2008, vol. 33, no6 [pp. 841-867]

Bibliographic references : 43 ref.

Collation : 15 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1579

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2008
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