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(Article of periodic en Anglais - 2012)

Document title

Hydrogeomorphic effects of basin lithology on development of channel steps in first-order basins of the Ashio Mountains, Japan

Authors(s) and Affiliation(s)

HATTANJI T. (1) ; WASKLEWICZ T.A. (2) ; HAYAKAWA Y.S. (3) ; WESTER T. (2) ; HEGI Y. (4) ;
(1) Fac. of Life and Environmental Sciences, Univ., Tsukuba, JAPON
(2) Dep. of Geography, East Carolina Univ., Greenville, ETATS-UNIS
(3) Center for Spatial Information Science, Univ., Tokyo, JAPON
(4) College of Geoscience, Univ., Tsukuba, JAPON

Abstract

This study focuses on lithological contrasts of headmost channel morphology of 2 mountainous areas underlain by chert or sandstone. The areas have contrasting runoff processes : subsurface storm flow predominates in the chert area, whereas groundwater flow recharges stable stream flow in the sandstone area. Manual field measurements from sections of first-order streams and results of high-resolution analysis of long profiles using terrestrial laser scanning are discussed. The contrast in runoff processes, as well as grain-size distributions of weathering products between the 2 areas, influences dissimilar bed-load transport regimes and promotes spatial variations in channel profiles between headwater streams. These contrasting hydro-geomorphic processes affect channel-step morphology, indicating that lithology plays a key role in the formation of channel steps and in variations between headwater streams

Source

Article of periodic

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 2012, vol. 33, no6 [pp. 536-573]

Bibliographic references : 3 p.

Collation : 14 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.2747/0272-3646.33.6.536

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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