Imagine yourself taking a
float trip down Glen Canyon as it was. Start here, and click on the
downstream links at the bottom of each page. (There's an exploratory
excursion at the Escalante River.)
Then imagine what it would
be like to do it again sometime in the future. The reservoir, like
any natural lake, is a temporary bottleneck in the flow of water from clouds
to ocean. Glen Canyon has dammed up naturally in the past, and Nature
has always removed the dams. But such events
occur in geological time, and human knowledge of such things tends to be
limited to human scales . . . of time and of understanding.
To err is human. To get it right is precious . . . and
too rare, because the profound guiding insights garnered by science in the past several centuries
are much subtler than they seem.
Think about silt. |