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Competition for water has intensified. Determining when, and how much, water needs to be left for in-river values is a challenge world-wide. In New Zealand there is now a well established connection between the flow regime, as defined by the magnitude and variability of flows, and suitability for in-river values. Physical habitat requirements of the biota have been defined and related to overall flow...
In this paper we investigate similarities in streamflow variables, identify groups of variables that represent different aspects of the flow regime, and we discuss the ecological relevance of these groups. For the study we used 35 flow variables for 62 New Zealand perennial rivers, which cover a wide range of flow regimes. All flow variables were calculated using daily mean flows from a common 7-year...
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