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The spatial temporal regime of stream flow of the conterminous U.S. in connection with indices of global atmospheric circulation

Boris Shmagin¹, Carol A. Johnston², & Scott Bridgham³

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1. Water Resources Institute South Dakota State University
2. South Dakota State University
3. University of Oregon Eugene

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Document Type:

Poster

Date:

Received 01 December 2007 14:35 UTC; Posted 04 December 2007

Subjects:

Earth and Environment

Tags:

• atmospheric circulation
• stream runoff
• gauging station
• watershed

Abstract:

Long-term stream flow records (1929-1988) from seventy one U.S. Geological Survey gauging stations with drainage area in range 1000-10000 sq mi were analyzed using multivariate statistics. Factor analysis of average annual flow revealed seven patterns of river runoff within seven distinct regions of the territory. This factor model reflected 69% variance of the initial matrix. The second set of stream flow records (1939-1972) from ninety-seven gauging stations was used as control. This set contains all seventy one from first one and additional stations with shorter observation period. Factor analysis of this expended set again yielded seven factors (69% variance of the initial matrix) with very similar spatial distribution of gauging stations.

Every group of watersheds obtained as a factor was presented by one gauging station with time series of annual discharges (1- 05474000, 2- 14321000, 3- 07019000, 4- 0815000, 5- 11186001, 6- 01666000, 7- 06800500) as the most typical for group. For the same time interval, streams represented by all patterns have increasing values (i. e. the positive difference between two time subintervals); but only the positive linear trend for patterns 1 and 7 are statistically significant.

For the seven typical flow records, monthly average values were obtained from three to five seasons composed from different ensembles of months.

For each annual time series of the typical seven stream flow patterns, regression equations were obtained from indices of global atmospheric circulation (AO, NAO, NPO and AAO). The equations contain from one to five variables (predictors) and have coefficients of correlation from 32% to 73%.

Presented at:

Joint Assembly, 17-21 May 2004, in Montreal & sponsored by AGU, CGU, SEG, & EEGS, 19 May 2004

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This document is licensed to the public under the Creative Commons Attribution 3.0 License

How to cite this document:

Shmagin, Boris, Johnston, Carol, and Bridgham, Scott. The spatial temporal regime of stream flow of the conterminous U.S. in connection with indices of global atmospheric circulation . Available from Nature Precedings <http://dx.doi.org/10.1038/npre.2007.1382.1> (2007)

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