Posted on | August 31, 2009 | 1 Comment
Here’s a nice way of thinking about aridity:
If all the water that flows in each river during an average year were spread evenly over the area drained by the river, the depths would be: Delaware 20.9 in.; Columbia 13.1 in.; Mississippi 6.7 in.; Colorado 1.15 in.
Source: Water and Choice in the Colorado Basin, National Research Council, 1968