(Article of periodic en Anglais - 2012)

Document title

Spatial patterns of March and September streamflow trends in Pacific Northwest streams, 1958-2008

published at : The geographical analysis of water problems

Authors(s) and Affiliation(s)

CHANG H. (1 2) ; JUNG I.W. (1 2) ; STEELE M. (1) ; GANNETT M. (3) ;
(1) Dep. of Geography, State Univ., Portland, ETATS-UNIS
(2) Inst. for Sustainable Solutions, State Univ., Portland, ETATS-UNIS
(3) U.S. Geological Survey, Oregon Water Science Center, Portland, ETATS-UNIS


This study detects significant negative trends in September absolute streamflow in a majority of 68 stream-gauging stations located on unregulated streams in the pacific Northwest (PNW) from 1958 to 2008. The geographically weighted regression (GWR) model results show spatial gradients of local R2 values with consistently higher local R2 values in the northern Cascades. This finding illustrates that different hydrologic landscape factors, such as geology and seasonal distribution of precipitation, also influence streamflow trends in the PNW. In addition, the spatial analysis model results show that considering various geographic factors help clarify the dynamics of streamflow trends over a large geographical area, supporting a spatial analysis approach over a spatial ordinary least squares (OLS)-estimated regression models for predicting streamflow trends


Thematical fascicle

published at : Geographical analysis / ISSN 0016-7363

Editor : Ohio State University Press, Columbus, OH - ETATS-UNIS (1969)

Millesime : 2012, vol. 44, no 3 [pp. 177-201]

Bibliographic references : 2 p.

Collation : fig., tabl.



INIST-CNRS, Cote INIST : 17078

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1538-4632.2012.00847.x

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