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Detailed presentation of dam removal and river restoration visualization project which helped in the decommissioning of two power dams in California.
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Visualizing Dam Removal and River Restoration in the Pacific Northwest
ASPRS/CaGIS Specialty Conference
November 16, 2010
Lex Ivey
Agenda
1. Background
2. Approach
3. Results
4. Outcomes
Background
• 250-mile river system
• Once 3rd largest salmon run on west coast
• Pacific Corp Klamath Hydro Power Project began in 1918
• Relicensing process in 2001
• American Rivers involved in 2001
• Hired TerraCognito to create 3D visualizations
Overall Approach
1. Model existing conditionsa) Terrain
b) Features
c) Textures
2. Model future conditionsa) Terrain
b) Features
c) Textures
Challenges
Large Area
Complex terrain
Forested
Data quality/availability• Ortho imagery
• Lake/river bed textures
Limited budget
Existing Conditions
• Terrain
• Reservoir surface
• Vegetation
• Structures– Dams
– Buildings
TERRAIN CREATIONnested, seamless TINs
regional context: USGS DEM
TERRAIN CREATIONnested, seamless TINs
regional context: USGS DEM
TERRAIN CREATIONnested, seamless TINs
areas of interest
TEXTURE CREATIONLandSat imagery
color, but low resolution
TEXTURE CREATIONDOQQ imagery
high resolution, but no color
TEXTURE CREATIONSolution
merged using Photoshop
FEATURE CREATIONExisting trees
USFS tree stand data
FEATURE CREATIONExisting trees
Tree images
FEATURE CREATIONExisting trees
Tree “fences”
FEATURE CREATIONExisting trees
Tree “fences”
FEATURE CREATIONStructures
Dam and powerhouse
RESULTSExisting conditions
Dam and powerhouse
RESULTSExisting conditions
Dam and powerhouse
Future Conditions
• Reservoir bottom
• River bed
• Re-vegetation
• River surface
TERRAIN CREATIONnested, seamless TINs
Existing conditions
TERRAIN CREATIONnested, seamless TINs
Reservoirs clipped out
TERRAIN CREATIONnested, seamless TINs
Reservoir bottom
Historic map
Digitized river course
TEXTURE CREATION
hillshade raster
photo-real sediment texture
random color ramp on elevation raster
TEXTURE CREATION
TEXTURE CREATIONFuture conditions
Reservoir draw-down
hillshade
photo-real restoration texture
elevation
TEXTURE CREATION
aspect
slope
TEXTURE CREATIONFuture conditions
Reservoir draw-down
TEXTURE CREATIONFuture conditions
Re-vegetation/river restoration
Results
1. Interactive fly-through
2. Animation videos
3. Still shots (before and after)
RESULTSexisting conditions
Dam and powerhouse
RESULTSfuture conditions
Restored river valley
RESULTSexisting conditions
Dam and powerhouse
RESULTSfuture conditions
Reservoir drawdown
RESULTSfuture conditions
Restored river valley
Outcomes
The visualizations were usedextensively by American Rivers throughout the settlement negotiation processand in meetings with legislators, and “inspiring” topotential funders who may be called upon to helpwith the costs of restoration.
“The visualizationsallayed many fears,filled in gaps and also served toinspire many people about howsoon a free-flowing KlamathRiver could become a functional,aesthetic resource thatcould benefit the environmentand community.”—Steve Rothert,American Rivers CaliforniaField Office Director
Outcomes
November 2008• PacifiCorp, the federal
government, and the states of California and Oregon signed an Agreement in Principle stating the preliminary view that “…..the benefits of dam removal outweigh the potential costs and impacts.”
MORE INFO
CommunityViz
http://www.communityviz.com
American Rivers
http://www.americanrivers.org
Klamath information
http://www.americanrivers.org/our-work/restoringrivers/dams/projects/restoring-klamath-river.html
Klamath visualizations
http://www.americanrivers.org/our-work/restoringrivers/dams/projects/
envisioning-a-restored-klamath.html
TerraCognito GIS Services, Inc:
http://www.terracog.com
Visualizing Dam Removal and River Restoration in the Pacific Northwest
ASPRS/CaGIS Specialty Conference
November 16, 2010
Lex Ivey
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