Notes

1.A sub-drainage area, also called a watershed or drainage basin, is an area where all contributing surface waters share the same drainage outlet. Drainage areas channel runoff from precipitation and snow melt into stream flow. The resulting hierarchy of streams and rivers and their associated sub-drainage areas form the National Hydrological Network of Canada. There are 11 major drainage areas and 164 sub-drainage areas in Canada. Canada's entire land and fresh water area has been allocated to individual drainage areas. See Map 2.3 and Table 2.2 for classification codes and area figures for these sub-drainage areas.
2.Natural Resources Canada, 2004, “Land and Freshwater Areas,”The Atlas of Canada, atlas.gc.ca/site/english/learningresources/facts/surfareas.html (accessed March 23, 2005).
3.Fresh Water Resources, Human Activity and the Environment, Catalogue no. 16-201-X.
4.Ibid.