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Forests 2015, 6(11), 4349-4359;

Effects of Land Use on Flow Rate Change Indices

Department of Environmental Sciences, University of Quebec at Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières QC G9A 5H7, Canada
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editors: James M. Vose and Ge Sun
Received: 10 September 2015 / Revised: 26 October 2015 / Accepted: 18 November 2015 / Published: 24 November 2015
(This article belongs to the Special Issue Forest Management and Water Resources in the Anthropocene)
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The goal of this study was to analyze the impact of agriculture on the spatial and temporal variability of flow rate change indices from 1930 to 2008. The two indices used are the coefficient of immoderation (CI) and the coefficient of variation (CV). Values of these two indices are higher for the L’Assomption River agricultural watershed than for the Matawin River forested watershed due to higher runoff in the former than in the latter. The difference in these values between the two watersheds is greater for winter, but it is lower for summer, when the difference in runoff between the two watersheds is strongly attenuated by the presence of crops. Regarding the temporal variability, a difference between the two watersheds is observed in the fall. For the agricultural watershed, mean values of neither index show a break in slope, while a break is observed for the forested watershed. In both watersheds, both indices are positively correlated with maximum temperature and total rainfall in winter, but only to this latter climate variable in the fall. In springtime, the two indices are negatively correlated with minimum temperature in the forested watershed, but only CV is correlated, positively, with this same climate variable in the agricultural watershed. View Full-Text
Keywords: flow rate change; coefficient of variation; coefficient of immoderation; temperature; precipitation; agriculture flow rate change; coefficient of variation; coefficient of immoderation; temperature; precipitation; agriculture

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Assani, A.; Delisle, F.; Landry, R.; Muma, M. Effects of Land Use on Flow Rate Change Indices. Forests 2015, 6, 4349-4359.

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