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(Article of periodic en Anglais - 2014)

Document title

Temporary streams in a peatland catchment : pattern, timing, and controls on stream network expansion and contraction

Authors(s) and Affiliation(s)

GOULSBRA C. (1) ; EVANS M. (1) ; LINDSAY J. (2) ;
(1) Upland Environments Research Unit, School of Environment and Development, Univ., Manchester, ROYAUME-UNI
(2) Dept. of Geography, Univ., Guelph, CANADA

Abstract

Electrical resistance (ER) technology has been used to create sensors capable of detecting the presence and absence of flow in ephemeral portions of the channel network, in the Upper North Grain research catchment, a small peatland headwater in the South Pennines, UK. Networks of around 40 sensors were deployed in autumn 2007 and summer 2008. Water table depth was identified as the key factor determining the temporal pattern of streamflow at both the site- and catchment-wide scales. Spatially, network expansion and contraction occurred in a disjointed manner, following a similar pattern between events, suggesting that localized controls are important for flow generation. Spatial controls on flow generation relate to local water table levels, and include drainage area, local dissection, channel slope and gully morphology. These results suggest that potential future change in catchment water tables, associated with projected climate change or with peatland restoration by rewetting, will modify the frequency of full catchment connectivity

Source

Article of periodic

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

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

Millesime : 2014, vol. 39, no6 [pp. 790-803]

Bibliographic references : 1 p.

Collation : 11 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.3533

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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