An example of application: The ecological “natural flow regime” paradigm in hydroclimatology |
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| Authors: | Ali A Assani Jean-François Quessy Mhamed Mesfioui Martin Matteau |
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| Institution: | 1. Laboratoire d''hydro-climatologie et de géomorphologie fluviale (Hydroclimatology and Fluvial Geomorphology Laboratory), Geography Section, Pavillon Léon-Provencher, Université du Québec à Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec, Canada G9A 5H7;2. Département de Mathématiques et d''Informatique (Department of Mathematics and Computer Science), Université du Québec à Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec, Canada G9A 5H7 |
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| Abstract: | According to the concept of “natural flow regime,” introduced and developed in the 1990's in aquatic ecology, streamflow can be described using five basic characteristics: magnitude, frequency, duration, period of occurrence and variability. A sixth could be added to these, namely, distribution curve. Our study, which focused exclusively on the temporal variability of these six characteristics, had these objectives: (1) to compare their stationarity, (2) to determine the links among these characteristics and (3) to analyze, for the first time, their relationship to six climatic indices (Atlantic Multidecadal Oscillation, Artic Oscillation, North Atlantic Oscillation, Niño3.4, Pacific decadal Oscillation and Southern Oscillation Index). To do this, we used the Vermillon River (2670 km²) as an example, analyzing the streamflow of heavy spring floods (equal to or greater than the annual flood streamflow), as measured between 1934 and 2000. |
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| Keywords: | &ldquo Natural flow regime&rdquo paradigm Fundamental streamflow characteristic Hydrologic variable Heavy spring floods Climatic indices Vermillon River Qué bec |
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