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Watershed and Volume Analysis using a LiDAR DEM Tillcon Quarry - Prospect Park Jeff Hoffman, N.J. Geological Survey, NJDEP
Pumping at quarry to dewater. But no allocation permit. NJDEP investigation . 2007 imagery
3-meter spacing LiDAR data. Draft DEM. 3-D Analyst tools to clip and contour elevations.
Spatial Analyst Fill Quarry’s watershed?
Spatial Analyst Fill Flow Direction Flow Accumulation 11-100 101- 1,000
Spatial Analyst Fill Flow Direction Flow Accumulation Create flow lines.
Spatial Analyst Fill Flow Direction Flow Accumulation Create flow lines. Create vertices.
Spatial Analyst Fill Flow Direction Flow Accumulation Create flow lines. Create vertices. Pick pour point. Create watershed.
87 acres  Reservoir  potential?
0.56 billion gallons Raster tool:  Cut/Fill Actual elevation Filled to 200’ Raster tools:  Reclassify,  Minus
Reservoir Volumes, northeast New Jersey (billions of gallons)
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Watershed and Volume Analysis using a LiDAR DEM

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Transcript of "Watershed and Volume Analysis using a LiDAR DEM"

  1. 1. Watershed and Volume Analysis using a LiDAR DEM Tillcon Quarry - Prospect Park Jeff Hoffman, N.J. Geological Survey, NJDEP
  2. 2. Pumping at quarry to dewater. But no allocation permit. NJDEP investigation . 2007 imagery
  3. 3. 3-meter spacing LiDAR data. Draft DEM. 3-D Analyst tools to clip and contour elevations.
  4. 4. Spatial Analyst Fill Quarry’s watershed?
  5. 5. Spatial Analyst Fill Flow Direction Flow Accumulation 11-100 101- 1,000
  6. 6. Spatial Analyst Fill Flow Direction Flow Accumulation Create flow lines.
  7. 7. Spatial Analyst Fill Flow Direction Flow Accumulation Create flow lines. Create vertices.
  8. 8. Spatial Analyst Fill Flow Direction Flow Accumulation Create flow lines. Create vertices. Pick pour point. Create watershed.
  9. 9. 87 acres Reservoir potential?
  10. 10. 0.56 billion gallons Raster tool: Cut/Fill Actual elevation Filled to 200’ Raster tools: Reclassify, Minus
  11. 11. Reservoir Volumes, northeast New Jersey (billions of gallons)
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