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(Article of periodic en Anglais - 2012)

Document title

The challenge of modeling pool–riffle morphologies in channels with different densities of large woody debris and boulders

Authors(s) and Affiliation(s)

THOMPSON D.M. (1) ;
(1) Dep. of Physics, Astronomy and Geophysics, Connecticut College, New London, ETATS-UNIS

Abstract

A Monte Carlo simulation approach and developmental computer model was created to predict pool formation, spacing and the percentage length covered by pools, riffles, scour holes and runs based on input data that include channel slope, width, the number of small and large boulders, and the number of 10-30 cm, 30-60 cm and >60 cm pieces of wood. The statistical-empirical model is founded on the idea that boulders, bedrock outcrops and large woody debris provide a physical framework that then controls local water-surface slopes, velocity patterns and the locations of pools and riffles. The spacing values of individual types and sizes of obstructions are modeled as log-normal distributions with separate distributions for each obstruction type. Pools are assigned different probabilities of development depending on the obstruction type. The model accurately mimics some statistical attributes of pool spacing, and future versions of the model could be developed to improve overall predictive capabilities

Source

Article of periodic

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

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

Millesime : 2012, vol. 37, no2 [pp. 223-239]

Bibliographic references : 1 p.

Collation : 8 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.2256

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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