I've seen quite a few articles on this issue in the last year or so, and while I'm not sure how critical things really are for the Calgary region, it is interesting to see just how close we are to tipping the balance to creating a dustbowl for communities further down along the Bow, Oldman, and South Saskatchewan rivers.
Just for some further reading, the government announced a moratorium on water licenses for the above 3 basins not too long ago. Which of course doesn't fix the problem, but should stop it from getting worse.
RiverKeeper article commenting:
http://www.aenweb.ca/node/992
Government of Alberta Press Release August 30, 2006:
http://www.gov.ab.ca/acn/200608/2043...E8EF4EF81.html
The reason I didn't include Calgary as being a part of the critical area is that not much water is drawn out of the basin until it reaches Calgary and the surrounding area. It's really any regions that rely on the water downriver from us that will really suffer.