Streamflow regionalization in British Columbia, no. 2 : regression of mean annual flows on physiographic parameters / R.M. Leith. : En36-508/46E-PDF

"Mean annual flows have been regressed on physiographic parameters for 62 hydrometric stations in British Columbia. The equation for unit mean annual flow, UMAF, UMAF = 10.4 + 0.0319 NPOSI - 0.172 x 10⁻² ELEV - 0.131 x 10⁻² DSNW - 0.0567 RAFOR + 0.909 RASWP + 0.758 x 10⁻⁴ SEW explained 61% of the total variation and had a standard error of estimate of 1.71 cfs/sq.mi. This equation was developed by backward elimination of variables and was tested by examination of residuals, by geographic plot, by runs test and by tests of normalcy. In the process of building the equation, subsamples of the 62 stations were taken and regression equations developed. This allowed the identification of important parameters, other than those which appear in the above equation. For example, Barrier Height to North, BHN, appeared in five of the seven intermediate equations"--Abstract, page v.

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