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- W2473365632 endingPage "860" @default.
- W2473365632 startingPage "850" @default.
- W2473365632 abstract "As human activity and climate variability alter the movement of water through the environment the need to better understand hydrologic cycle responses to these changes has grown. A reasonable starting point for gaining such insight is studying changes in streamflow given the importance of streamflow as a source of renewable freshwater. Using a wavelet assisted method we analyzed trends in the magnitude of annual scale streamflow variability from 967 watersheds in the continental U.S. (CONUS) over a 70 year period (1940–2009). Decreased annual variability was the dominant pattern at the CONUS scale. Ecoregion scale results agreed with the CONUS pattern with the exception of two ecoregions closely divided between increases and decreases and one where increases dominated. A comparison of trends in reference and non-reference watersheds indicated that trend magnitudes in non-reference watersheds were significantly larger than those in reference watersheds. Boosted regression tree (BRT) models were used to study the relationship between watershed characteristics and the magnitude of trends in streamflow. At the CONUS scale, the balance between precipitation and evaporative demand, and measures of geographic location were of high relative importance. Relationships between the magnitude of trends and watershed characteristics at the ecoregion scale exhibited differences from the CONUS results and substantial variability was observed among ecoregions. Additionally, the methodology used here has the potential to serve as a robust framework for top-down, data driven analyses of the relationships between changes in the hydrologic cycle and the spatial context within which those changes occur." @default.
- W2473365632 created "2016-07-22" @default.
- W2473365632 creator A5019689629 @default.
- W2473365632 creator A5026934749 @default.
- W2473365632 creator A5035738936 @default.
- W2473365632 date "2016-09-01" @default.
- W2473365632 modified "2023-10-17" @default.
- W2473365632 title "The influence of watershed characteristics on spatial patterns of trends in annual scale streamflow variability in the continental U.S." @default.
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