Notes
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The water
yield is the amount of freshwater derived from unregulated streamflow (m3/s) measurements for a given geographic area over a defined period
of time. The freshwater streamflow is generated from a combination of baseflow,
interflow, and overland flow originating from groundwater, precipitation and/or
snowpack. The flow rate encompasses the hydrologic processes (for example,
interception, infiltration, and evapotranspiration) and the state of water
storage (for example, lakes, aquifers, snowpack, and soil moisture) within
a drainage basin (Mosley and McKerchar, 1993); it is influenced by climatic
and physiographic variables such as temperature and topography (Bemrose et
al., 2009).
The North-line is based on a statistical area classification of the north
by Statistics Canada reflecting a combination of 16 social, biotic,
economic and climatic characteristics that delineate north from south in Canada
(McNiven and Puderer, 2000).
Higher order polynomials
could be fit. Adding higher orders to the global polynomial will increase
the coefficient of determination which eventually will lead to a perfect fit
to the trend-cycle.
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