Multibeam Bathymetric and Backscatter Maps of the Upper Hudson Shelf Valley and Adjacent Shelf, Offshore of New York


Results

The results of this report are presented within the pages listed below and in Figures 1-10

  • Overview
  • Recent Historical Disposal Sites
  • Dredged Material Disposal Site
  • Evidence for Dumping
  • Striping of Data
  • Outcropping Beds of Coastal Plain Strata
  • Sand Waves
  • Hudson Shelf Valley


    • Click on figures below for larger images with captions
  • Figure 1, Figure 3 and Figure 4 contain a 3D prespective view of the northern portion of the study region and overview maps of the bathymetry and backscatter intensity of the entire Hudson Shelf Valley surveyed to date.
    • Figure 1. Map showing location of multibeam survey (yellow outline).
    Figure 1
    		 Figure 3. Perspective view of the northern portion of the survey region showing sea floor topography and sediment backscatter, looking southwest and across the shelf and toward the head of the Hudson Shelf Valley.
    		 Figure 4. Bathymetry of Hudson Shelf Valley as measured in the multibeam survey.
  • Figure 5, Figure 6, and Figure 7 present the observations north of 40° 14' N. Figures 5 and Figure 6 are maps of the bathymetry and backscatter intensity at a scale of 1:25,000. Figure 7 is at 1:12,500.
    		•
    Figure 5. Map showing shaded-relief bathymetry (contoured at 2m intervals) for the northern portion of the survey area.
    Figure 5
    		 Figure 6. Map showing backscatter intensity, bathymetry contoured at 10 m intervals, locations of sediment samples, and surficial sediment texture (as pie diagrams).
    		Figure 7. Shaded-relief bathymetric map with 2 m contours (left) and backscatter intensity (right) with the same 2 m bathymetric contours at a scale of 1:12.500 for the region surrounding the Dredged Material Disposal Site.
  • Figures 7-10 contains maps of selected features at a scale of 1:12,500.
    • Figure 7. Shaded-relief bathymetric map with 2 m contours (left) and backscatter intensity (right) with the same 2 m bathymetric contours at a scale of 1:12.500 for the region surrounding the Dredged Material Disposal Site.
    Figure 7
    		 Figure 8. Perspective of the survey region with low-relief sand waves.
    		 Figure 9. Shaded-relief bathymetric map of a region centered at 40° 16' N, the region for disposal of unsalvageable vessels from the port of New York-New Jersey.
    		 Figure 10. Bathymetric (left panel) and backscatter (right panel) signature of the ubiquitous features throughout the survey that are interpreted to be individual dumps of material (scale 1:12,500).
    Back to Top
    Previous Page Next Page
    bar.gif (3055 bytes)
    Based on Butman, B., Danforth, W.W., Schwab, W.C., and Buchholtz ten Brink, M.B., 1998, Multibeam Bathymetric and Backscatter Maps of the Upper Hudson Shelf Valley and Adjacent Shelf, Offshore of New York: U.S. Geological Survey Open-File Report 98-616.
    bar.gif (3055 bytes)
    Web page by: Donna Newman
    [an error occurred while processing this directive]