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Understanding Sedimentation and Land Use Cover Relationships in the Lake Sidney Lanier Watershed

Mar 15, 2016

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Understanding Sedimentation and Land Use Cover Relationships in the Lake Sidney Lanier Watershed. Russell A. Lundstrum Natural Resources Specialist, Park Ranger Lake Sidney Lanier, Buford Dam MGIS Program, Pennsylvania State University Capstone Project July 2009 - February 2010 Rev. 7. - PowerPoint PPT Presentation

Slide 1US Army Corps of Engineers BUILDING STRONG®
Understanding Sedimentation and Land Use Cover Relationships in the Lake Sidney Lanier Watershed
Russell A. Lundstrum
Capstone Project
Buford Dam built in 1952
Filled to full pool in 1957
Over 15,000 adjacent land owners
10,000 private docks
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Recent court ruling decided that the lake is not authorized for water supply. Alternatives must be found in three years.
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Zone 1: Normal Operation
Zone 3: Reduced Hydropower, Severely Limited Navigation
Zone 4: Hydropower at Minimum, Little/No Navigation
Below 1035’: Unable to Generate Power, “dead storage”
6 State Parks
2,240 miles of streams*
3,909 miles of roads**
How much sediment has accumulated in Lake Sidney Lanier?
Is there a correlation between sediment accumulation and land-cover change in the Lake Sidney Lanier watershed?
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4 Selected, Based On:
Sufficient Sedimentation Range data
New Neighborhoods
More Roads
Forested Areas
130,000 cubic yards of silt removed
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Based on personal knowledge of the local area, I know of housing developments next to the lake and chose the sub-watersheds accordingly. One was selected
Stats for this area being dredged?
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Sediment Affects…
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404- has a SR in main channel, one SR has no change
801- contains SR with most accumulation and greatest accumulation rate
808- significant amount of land cover change
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Data Discussion
Land cover
Georgia Land Use Trends (GLUT, University of Georgia, Athens, GA)
Collected 1974, 1991, 2005
Three data sets: 1956, 1983, 1990
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Land Cover
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Data Discussion
Land cover
Collected 1974, 1991, 2005
Located in various creeks impounded by the lake
Three data sets: 1956, 1983, 1990
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Explain SR and bathymetric, Measurement of depth across a transect
Next slide is SR graph and map
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I used known monuments coordinates and the azimuth between monuments of the SR to calculate the survey tables and geographically place bathymetric survey depths onto a map with the depths as attributes.
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Point out station 1400-1600
1957 Lake Lanier filled to full pool
1974 Georgia Land Use Trends Cover
1983 Sedimentation Range Survey
1990 Sedimentation Range Survey
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Strong increase
Strong decrease
No change
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Raster analysis to be started in October
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Research Relevance
Reduces hydropower capacity
Can impact flood storage
Estimated $2 billion in real estate between Buford Dam and Peachtree Creek
Effects municipal water supply
Reduces water storage capacity
Diffuser pipes become clogged
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Reduces hydropower capacity
Can impact flood storage
Estimated $2 billion in real estate between Buford Dam and Peachtree Creek
Effects municipal water supply
Reduces water storage capacity
Diffuser pipes become clogged
Additional water treatment for turbid water (minimal on this lake)
BUILDING STRONG®
Research Relevance
Reduces hydropower capacity
Can impact flood storage
Estimated $2 billion in real estate between Buford Dam and Peachtree Creek
Effects municipal water supply
Reduces water storage capacity
Diffuser pipes become clogged
Additional water treatment for turbid water (minimal on this lake)
Flooding in Mableton, GA, September 2009
Map of home value below Buford Dam
BUILDING STRONG®
Research Relevance
Reduces hydropower capacity
Can impact flood storage
Estimated $2 billion in real estate between Buford Dam and Peachtree Creek
Effects municipal water supply
Reduces water storage capacity
Diffuser pipes become clogged
Additional water treatment for turbid water (minimal on this lake)
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March: Project Revisions
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Questions?