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(Article of periodic en Anglais - 2009)

Document title

Scale-dependent controls upon the fluvial export of large wood from river catchments

Authors(s) and Affiliation(s)

SEO J.I. (1) ; NAKAMURA F. (1) ;
(1) Dep. of Forest Science, Graduate School of Agriculture, Hokkaido Univ., Sapporo, JAPON

Abstract

The annual fluvial export of large wood (LW) was monitored by local reservoir management offices in Japan. LW export per unit watershed area was relatively high in small watersheds, peaked in intermediate watersheds, and decreased in large watersheds. To explain these variations, the AA. surveyed the amount of LW with respect to channel morphology in 78 segments in the Nukabira River, northern Japan. They examined the differences in LW dynamics, including its recruitment, transport, storage, and fragmentation and decay along the spectrum of watershed sizes. The AA. found that a large proportion of LW produced by forest dynamics and hillslope processes was retained because of the narrower valley floors and lower stream power in small watersheds. Although these stored LW pieces can be refloated and transported by subsequent flood events, they may also become trapped by obstacles such as logjams and standing trees on floodplains and in secondary channels. Thus, the fluvial export of LW pieces is low in large watersheds

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, no6 [pp. 786-800]

Bibliographic references : 2 p.

Collation : 7 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1765

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