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(Article of periodic en Anglais - 2011)

Document title

Sediment dynamics below retreating cliffs

Authors(s) and Affiliation(s)

WARD D.J. (1 2) ; BERLIN M.M. (3) ; ANDERSON R.S. (1 2) ;
(1) Inst. of Arctic and Alpine Research, Univ. of Colorado, Boulder, ETATS-UNIS
(2) Dep. of Geological Sciences, Univ. Colorado, Boulder, ETATS-UNIS
(3) Community Surface Dynamics Modeling System, Univ. of Colorado, Boulder, ETATS-UNIS

Abstract

Motivated by field observations and high-resolution topographic data from 2 sites in western Colorado, the AA. develop a two-dimensional (2D), rules-based numerical model to simulate the erosion of channels draining a plinth and diffusive erosion of the intervening interfluves. In this model, retreat of a cliffband occurs when the height of the vertical cliff exceeds a threshold due to incision by channels on the plinth below. Debris derived from cliff retreat is distributed over the model plinth according to the local topography and distance from the source. This debris then weathers in place, and importantly can act to reduce local bedrock erosion rates, protecting both the plinth and ultimately the cliff from erosion. In this paper, the AA. focus on 2 sets of numerical model experiments : regulating the rate of rockfall to limit the cliff retreat; varying the weathering rate of the rockfall debris

Source

Article of periodic

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

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

Millesime : 2011, vol. 36, no8 [pp. 1023-1043]

Bibliographic references : 1 p.

Collation : 17 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2129

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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