May 2013
Beginner
288 pages
6h 13m
English
The Preparation Principle—Prepare or Beware
In the Grand Canyon, the water in the Colorado River no longer rises and drops based on the Spring runoff. The water flow through the canyon is determined by the number of air conditioners turned on in Phoenix and Las Vegas. The greater the power demand, the more water is released from Glen Canyon Dam.
Rising water makes some rapids bigger—and more dangerous. Lower water levels make some rapids smaller—and more dangerous. Running the rapids is further complicated because the water is rising and dropping at different times and in different locations on the river. The changing river dynamics demand that whenever possible you stop, scout ahead, and prepare ...