Real Estate in Buford Georgia - PowerPoint

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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




US Army Corps of Engineers
BUILDING STRONG®
Lake Sidney Lanier
          Located 60 miles north of
           Atlanta, GA
          Buford Dam built in 1952
            ►   Filled to full pool in 1957
          Over 15,000 adjacent
           land owners
            ►   10,000 private docks
          Source of drinking water
           for 3.5 million people
          Over 7.5 million visitors to
           the lake annually

                               BUILDING STRONG®
                   Lake Level Action Zones




Above 1071’: Flood Water Storage                          http://water.sam.usace.army.mil
Zone 1: Normal Operation
Zone 2: Reduced Hydropower, Limited Navigation
Zone 3: Reduced Hydropower, Severely Limited Navigation
Zone 4: Hydropower at Minimum, Little/No Navigation
Below 1035’: Unable to Generate Power, “dead storage”
                                                            BUILDING STRONG®
Vital Statistics
           692 miles of shoreline
           39,038 acres of water
           17,726 acres of land
           41 USACE parks
           10 Marinas
            ►   10,000+ Boats
         13 County and City Parks
         6 State Parks




                            BUILDING STRONG®
Apalachicola-Chattahoochee-Flint
       River Basin (ACF)




                         BUILDING STRONG®
 Upper Chattahoochee Watershed

          9 counties
  1,034 square miles
60 square miles of that
    is the lake itself
2,240 miles of streams*
3,909 miles of roads**


 *USGS NHD dataset
 **TeleAtlas 2009

                          BUILDING STRONG®
       Research Questions
 How has land use changed in the
  watershed?
 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?


                                   BUILDING STRONG®
           Study Area Selection
 44 Sub-watersheds Drain
  to Lake Sidney Lanier
 4 Selected, Based On:
   ►   Sufficient Sedimentation
       Range data
        • Max. Accumulation
        • Max. Erosion
        • No Change
   ►   Visual Analysis of Land
       Cover Change
        • New Neighborhoods
        • More Roads
        • Forested Areas

                                  Longwood Cove, Lake Sidney Lanier
                                  130,000 cubic yards of silt removed


                                                                        BUILDING STRONG®
         Sediment Affects…
   Recreation
   Wildlife
   Water Supply
   Water Quality




                         BUILDING STRONG®
  Sub-watershed Study Areas
                    404




                   801



808

             804




                          BUILDING STRONG®
                Study Area Summary
          USGS HUC ID:       404           801           808             804
Size (acres)                14,795        15,806       13,356          16,642
                          North end-    North end-    Southwest-     Southeast-
Location
                          Gainesville   Gainesville    Cumming     Flowery Branch
Sedimentation
                              5             4             3               4
Ranges
Docks                        856          1,199          850             707
Limited Development*      517 (4.6%)    600 (3.8%)    535 (4.0%)     373 (2.2%)
(acres)

Protected* (acres)        506 (3.4%)    668 (4.2%)    266 (2.0%)     507 (3.1%)

Recreation* (acres)       125 (0.8%)    849 (5.4%)    476 (3.6%)     516 (3.1%)



*USACE Allocation Zones

                                                                BUILDING STRONG®
            Data Discussion
 Land cover
  ► Georgia Land Use Trends (GLUT, University of
    Georgia, Athens, GA)
  ► Collected 1974, 1991, 2005

 Sedimentation Range
  ► Cross section bathymetric surveys
  ► Located in various creeks impounded by the reservoir
  ► Three data sets: 1956, 1983, 1990




                                             BUILDING STRONG®
Land Cover
 Beaches, Dunes, Mud
 Open Water
 Low Intensity Urban
 High Intensity Urban
 Clear cut, Sparse
 Quarries, Strip Mines
 Deciduous Forest
 Evergreen Forest
 Mixed Forest
 Row Crops and Pasture
 Forested Wetland
 Non-forested Wetland-Fresh   Sub-watershed HUC 808
                              Cumming, GA, 1991


                                                      BUILDING STRONG®
              Data Discussion
 Land cover
  ► Georgia   Land Use Trends (GLUT, University of
    Georgia
  ► Collected 1974, 1991, 2005

 Sedimentation Range
  ► Cross section bathymetric surveys across lake
  ► Located in various creeks impounded by the lake
  ► Three data sets: 1956, 1983, 1990




                                              BUILDING STRONG®
           Sedimentation
              Ranges




SR#33A Survey, 1990




                      BUILDING STRONG®
BUILDING STRONG®
Significant Dates for Project Data
  1956 Sedimentation Range Survey, Baseline
  1957 Lake Lanier filled to full pool

  1974 Georgia Land Use Trends Cover
  1983 Sedimentation Range Survey

  1990 Sedimentation Range Survey
  1991 Georgia Land Use Trends Cover

  2005 Georgia Land Use Trends Cover



                                               BUILDING STRONG®
                     Methods

  Land cover change              Sediment Range
   ► Visualanalysis             ► Drastic  increases or
   ► Raster analysis
                                  decreases in sediment
                                ► Identify areas that have
      • Impervious surfaces       certain characteristics
      • Forested areas              • Strong increase
      • Urban/suburban              • Strong decrease
        areas                       • No change


How do the land cover and sediment range data correlate?


                                             BUILDING STRONG®
                Research Relevance
   Effect of silt on lake operations
     ► Reduces hydropower capacity
         • Minimal impact
     ►   Effects recreation, wildlife
           • Shallow water in marinas
           • Turbid water in creeks and coves
     ►   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
   Effect of silt on lake operations
     ►   Reduces hydropower capacity
          • Minimal impact
     ►   Effects recreation, wildlife
          • Shallow water in marinas
          • Turbid water in creeks and
             coves
     ►   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
   Effect of silt on lake operations
     ►   Reduces hydropower capacity
           • Minimal impact
     ►   Effects recreation, wildlife
           • Shallow water in marinas
           • Turbid water in creeks and coves
     ►   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
   Effect of silt on lake operations
     ►   Reduces hydropower capacity
           • Minimal impact
     ►   Effects recreation, wildlife
           • Shallow water in marinas
           • Turbid water in creeks and coves
     ►   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®
                      Timeline
                                2009
►   July: Research Started
►   August: Proposal Rough Drafts
►   September: Online Proposal Presentation
►   October: Start Research Analysis
►   November: GIS Day Presentation
►   December: Continue Research Analysis

                                2010
►   January: Draft Analysis Findings
►   February 9-11: Final Presentation, USACE South Atlantic Division
    Ranger Conference in Savannah, GA
►   March: Project Revisions
►   April: Final MGIS Wrap-up
►   May 15: Graduate
►   June: Present Documents and Research Findings to USACE



                                                        BUILDING STRONG®
Thank you for your time!
     Questions?




                      BUILDING STRONG®

				
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