The chemistry, mineralogy, and rates of transport of sediments in the ...

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TABLE 13 .
Results of multiple linear regression analyses of the
relationships between the logs of mean (1971-73) annual
rates of traport of suspended sediments (ST , in metric
tons qr' 1 ), PCa , PNa , PPa (in metric tons yr-f3 and logs
of the variables : watershed area (Ad, in km 2 ), relief
(1E, in km), river length (L, in km), mean annual daily
temperature (T), mean annual precipitation (P, in mm),
forest cover (F, in arbitrary rank, see Methods Section),
and surface geology (G, in arbitrary rank, see Methods
Section), for rivers and watersheds listed of Groups 1 and
2 (excluding Mackenzie at Norman Wells) in Table 1 .
Mean Annual Rate
of Transport
of
Total Variability Relative Contribution Of Each
Accounted For (X*"* 'Variable* (Y)
AE
SS 98 84 .6 5 .7 0 .7 7 .1 -
a
PC 98 .86 .7 9 .0 2 .2 -
a
PN
a
I
97 89 .0 5 .3 2 .9 - -
PP 98 85 .6 8 .7 0 .7 3 .0
a
* Assuming that the preceding parameter (i .e . to the left) is already in
the model, the table shows the percent contribution of each paramenter
to the total variability in rates of transport accounted for by the
multiple regression .