GIS for Faster Analysis of Dam-Break Flows. Steve Pitman GIS in Water Resources – Fall 2003 Dr. David Maidment – UT Austin. The Problem:. A breached dam releases large volumes of water very rapidly Can’t predict dam-break floods using observations of natural floods
GIS in Water Resources – Fall 2003
Dr. David Maidment – UT Austin
Consider a worst case scenario:
On the Colorado River, Glen Canyon Dam and Hoover Dam, 370 miles apart, created Lake Powell and Lake Mead with combined storage equal to roughly four times the river’s annual flow.Dams in the U.S.
What would this water do if rapidly released?
Teton Dam, Idaho – present day
Finite-difference solution of dynamic wave equations
Flow rates & depths at selected locations
Outflow HydrographCurrent Dam-Break Models
USGS – The National Map