(Article of periodic en Anglais - 2011)

Document title

Downstream effects of impounding a natural lake: the Snake River downstream from Jackson Lake Dam, Wyoming, USA

Authors(s) and Affiliation(s)

ERWIN S.O. (1) ; SCHMIDT J.C. (1) ; NELSON N.C. (1) ;
(1) Watershed Sciences Dept., Utah State Univ., Logan, ETATS-UNIS


Calibration of the transport relations was based on bed load transport data collected over a wide range of flows on the Snake River and its 2 major tributaries within the study area in 2006 and 2007. Comparison of actual flows with unregulated flows for the period since 1957 shows that operations of Jackson Lake Dam (JLD) have reduced annual peak flows and increased late summer flows. Painted tracer stones placed at 5 locations during the 2005 spring flood demonstrate that despite the reduction in flood magnitudes, common floods are capable of mobilizing the bed material. Calculations suggest that the Snake River was not in equilibrium before construction of JLD, but was naturally in sediment deficit. This result highlights the value of transport data and calculation of sediment mass balance in informing dam operations


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, no11 [pp. 1421-1434]

Bibliographic references : 1 p.

Collation : 12 fig., 6 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2159

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