gis for faster analysis of dam break flows l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
GIS for Faster Analysis of Dam-Break Flows PowerPoint Presentation
Download Presentation
GIS for Faster Analysis of Dam-Break Flows

Loading in 2 Seconds...

play fullscreen
1 / 9

GIS for Faster Analysis of Dam-Break Flows - PowerPoint PPT Presentation


  • 452 Views
  • Uploaded on

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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'GIS for Faster Analysis of Dam-Break Flows' - libitha


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
gis for faster analysis of dam break flows

GIS for Faster Analysis of Dam-Break Flows

Steve Pitman

GIS in Water Resources – Fall 2003

Dr. David Maidment – UT Austin

the problem
The Problem:
  • A breached dam releases large volumes of water very rapidly
  • Can’t predict dam-break floods using observations of natural floods
  • Existing dam-break models
    • Complex, tricky and time consuming
    • Not conducive to rapid analysis
dams in the u s
Approx. 77,000 total

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.

USBR Photo

What would this water do if rapidly released?

Lake Powell

USBR Photo

teton dam idaho june 5 1976
Teton Dam, Idaho – June 5, 1976

Teton Dam, Idaho – present day

gis in dam break analysis today
GIS in Dam-Break Analysis Today
  • Pacific Disaster Center uses the M2M interface to translates FLDWAV output for display in ArcGIS
  • NWS developing FLDWAV-GIS link for displaying flood predictions
  • PBS&J (FEMA Contractor) has fielded a Watershed Analyst extension that automates pre- and post-processing of watershed modeling data
current dam break models

FLDWAV

Input:

Dam parameters

Valley geometry

Flood Routing

Finite-difference solution of dynamic wave equations

Output:

Flow rates & depths at selected locations

  • Estimate breach characteristics
  • Geometry
  • Formation time

Outflow Hydrograph

Current Dam-Break Models
  • DWOPER & DAMBRK developed by National Weather Service (NWS) in 1970’s
  • NWS released FLDWAV in 1990’s
    • Combined DWOPER & DAMBRK
    • Added functionality
adding automation with gis

GIS

Geospatial data

Time Series data

Geodatabase

Adding Automation with GIS

Interface Data Model

Pre-Processing

Post-Processing

example
Example

USGS – The National Map

resources
Resources
  • Applied Hydrology, Chow et al, McGraw Hill (1988)
  • U.S. Geological Survey websites
  • U.S. Bureau of Reclamation websites
  • National Inventory of Dams, U.S. Army Corps of Engineers
  • Arc Hydro, Maidment, ESRI Press (2002)
  • Source of photos