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This map displays the average annual runoff of Canada in mm. The map has provincial boundaries and major cities marked for positional reference. There are also boundaries defined by dotted lines denoting the regions where different models were used to produce the estimate. Runoff is displayed using filled contours, with low runoff displayed in yellow, high runoff displayed in blue and the range between displayed in a gradient of green. The highest runoff occurs in British Columbia, where it can be as high as 4000 mm. The lowest runoff occurs in the Prairies where values fall within the range of 0 to 100 mm.