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Relative Influence of Streamflows in Assessing Temporal Variability in Stream Habitat 1
Author(s) -
Goldstein Robert M.,
Meador Michael R.,
Ruhl Kelly E.
Publication year - 2007
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.2007.00051.x
Subject(s) - hydrology (agriculture) , environmental science , streamflow , streams , spatial variability , bank , bank erosion , habitat , coefficient of variation , sampling (signal processing) , erosion , linear regression , population , soil science , geology , ecology , geography , statistics , mathematics , geomorphology , drainage basin , computer network , geotechnical engineering , cartography , filter (signal processing) , computer science , computer vision , biology , demography , sociology
The effects of streamflows on temporal variation in stream habitat were analyzed from the data collected 6‐11 years apart at 38 sites across the United States. Multiple linear regression was used to assess the variation in habitat caused by streamflow at the time of sampling and high flows between sampling. In addition to flow variables, the model also contained geomorphic and land use factors. The regression model was statistically significant ( p < 0.05; R 2 = 0.31‐0.46) for 5 of 14 habitat variables: mean wetted stream depth, mean bankfull depth, mean wetted stream width, coefficient of variation of wetted stream width, and the percent frequency of bank erosion. High flows between samples accounted for about 16% of the total variation in the frequency of bank erosion. Streamflow at the time of sampling was the main source of variation in mean stream depth and contributed to the variation in mean stream width and the frequency of bank erosion. Urban land use (population change) accounted for over 20% of the total variation in mean bankfull depth, 15% of the total variation in the coefficient of variation of stream width, and about 10% of the variation in mean stream width.