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Watershed and Volume Analysis using a LiDAR DEM Tillcon Quarry - Prospect Park Jeff Hoffman, N.J. Geological Survey, NJDEP

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Page 1: Watershed and Volume Analysis using a LiDAR DEM

Watershed and Volume Analysis using a LiDAR DEMTillcon Quarry - Prospect Park

Jeff Hoffman, N.J. Geological Survey, NJDEP

Page 2: Watershed and Volume Analysis using a LiDAR DEM

Pumping at quarry to dewater.

But no allocation permit.

NJDEP investigation.

2007 imagery

Page 3: Watershed and Volume Analysis using a LiDAR DEM

3-meter spacing LiDAR data.

Draft DEM.

3-D Analyst tools to clip and contour elevations.

Page 4: Watershed and Volume Analysis using a LiDAR DEM

Spatial AnalystFill

Quarry’s watershed?

Page 5: Watershed and Volume Analysis using a LiDAR DEM

Spatial AnalystFillFlow DirectionFlow Accumulation

11-100

101-1,000

Page 6: Watershed and Volume Analysis using a LiDAR DEM

Spatial AnalystFillFlow DirectionFlow AccumulationCreate flow lines.

Page 7: Watershed and Volume Analysis using a LiDAR DEM

Spatial AnalystFillFlow DirectionFlow AccumulationCreate flow lines.Create vertices.

Page 8: Watershed and Volume Analysis using a LiDAR DEM

Spatial AnalystFillFlow DirectionFlow AccumulationCreate flow lines.Create vertices.Pick pour point.Create watershed.

Page 9: Watershed and Volume Analysis using a LiDAR DEM

87 acres

Reservoir potential?

Page 10: Watershed and Volume Analysis using a LiDAR DEM

0.56 billion gallonsRaster tool: Cut/Fill

Actual elevation Filled to 200’

Raster tools: Reclassify, Minus

Page 11: Watershed and Volume Analysis using a LiDAR DEM

Reservoir Volumes, northeast New Jersey (billions of gallons)


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