SEA FLOOR TOPOGRAPHY AND BACKSCATTER INTENSITY OF THE HISTORIC AREA REMEDIATION SITE (HARS), OFFSHORE OF NEW YORK, BASED ON MULTIBEAM SURVEYS CONDUCTED IN 1996, 1998, AND 2000 U.S. Geological Survey Open-File Report 00-503 March 2002 by Bradford Butman(1), W.W. Danforth(1), S.C. Knowles(2), Brian May(2), and Laurie Serrett(1) (1) U.S. Geological Survey, Woods Hole Field Center, Woods Hole, MA 02543 (2) U.S. Army Corps of Engineers, New York District, 26 Federal Plaza, New York, NY 10278-0090 INTRODUCTION This DVD-ROM contains: (1) An interpretive report, presented in HyperText Markup Language (HTML), with links to figures in HTML as well as in PDF format. To access this report, open the file index.htm at the top level directory with your WWW browser. index.htm IS INTENDED AS THE PRINCIPAL POINT OF ACCESS FOR THIS REPORT. (2) [NOT ONLINE] An ArcView 3.2 project file that presents 1996, 1998, and 2000 multibeam observations from the Historic Area Remediation Site, as well as other information, in GIS format. To use this project fully, you must have ArcView 3.2 and Spatial Analyst installed on your PC. To access the GIS project, open the file HARS_GIS.apr in the GIS directory with ArcView. For a description of the views and the themes in these views, click on 'Data in GIS format' on the navigation bar in the interpretive report ((1) above). (3) The interpretive report, figures, and maps (at a scale of 1:25,000) in poster format. To access poster sheets 1-5 in PDF format, click on 'Report in Poster Format' on the navigation bar in the interpretive report in HTML format ((1) above). Sheets 2, 3, 4 and 5 are a convenient way to print figures 5 – 9 at a common scale. (4) Metadata describing the various data layers included in the GIS. To access the metadata, click on 'Metadata' on the navigation sidebar in the interpretive report in HTML format ((1) above). (5) The figures in PDF format suitable for printing at 81/2" by 11" and PDF's for the maps at a scale of 1:25,000, suitable for printing on 20"x26" paper. To access these files, click on 'Figures and Tables' on the navigation sidebar in the interpretive report in HTML format ((1) above). The original layouts in CorelDRAW10 format and in .eps format are available in the reports/Corel_Layouts directory. (6) The text in PDF format. To access this file, click on 'Report in PDF format on the navigation sidebar in the interpretive report in HTML format ((1) above). (7) Links to USGS collaborators, other agencies, and publications. These links are only accessible if access to the Internet is available during browsing of the DVD-ROM. BACKGROUND This DVD-ROM contains copies of multibeam data collected in 1996, 1998, and 2000. This is a collaborative study conducted in the Historic Area Remediation Site offshore of New York and involving the United States Geological Survey and United States Army Corps of Engineers. This report presents maps showing topography, shaded relief, and backscatter intensity (a measure of sea floor texture and roughness) at a scale of 1:25,000. Comparison of the topography and backscatter intensity from the three surveys show changes in topography and surficial sediment properties resulting from placement of dredged material in 1996 and 1997 prior to closure of the Mud Dump Site, as well as placement of capping material for remediation of the HARS./ DIRECTORORY STRUCTURE Directory REPORTS: This directory contains all of the information included in the study report. The top level of this directory contains all of the html files need to create this report. Subdirectory Corel_Layouts: This directory contains the Corel Draw files of the poster format of this report, Corel Draw 10 is required to open these files. [NOT ONLINE] Subdirectory Corel_Layouts/Printfiles: This directory contains the poster format of this report in an eps (encapsulated postscript) format. [NOT ONLINE] Subdirectory FullFigures: This directory contains jpeg and gif files of figures and tables from the poster format of this report. Subdirectory Images: This directory contains miscellaneous jpeg and gif files of images used in this report Subdirectory Jacket_art: This directory contains the figures in Adobe Illustrator format (.ai) for the DVD jacket front and back. [NOT ONLINE] Subdirectory Metadata: This directory contains FGDC compliant metadata related to the GIS data in both html and textformat. Subdirectory PDFs: This directory contains pdf files of figures, text, and the report in poster format. Subdirectory Thumbnails: This directory contains thumbnail images used to create this report. Directory GIS [NOT ONLINE]: Subdirectory 1_Boundaries: Subdirectory Coast: This directory contains shapefiles that delineate the coastline in this region. Subdirectory Disposal: This directory contains a shapefile that delineates the cellar dirt disposal area. Subdirectory HARS: This directory contains shapefiles that delineate various designated areas within the Historic Area Remediation Site. Subdirectory STATIONS: This directory contains a shapefile that shows the location of two tidal stations used in this report. Subdirectory Survey: This directory contains files that delineate the multibeam survey lines. Subdirectory 2_Multibeam_1996: Subdirectory Bathymetry: This directory contains contours generated from the multibeam data. Subdirectory Grids: This directory contains bathymetric and backscatter grids generated from the multibeam data. Subdirectory Imagery: This directory contains tiff and tfw files generated from the multibeam data. Subdirectory 3_Multibeam_1998: Subdirectory Bathymetry: This directory contains contours generated from the multibeam data. Subdirectory Grids: This directory contains bathymetric and backscatter grids generated from the multibeam data. Subdirectory Imagery: This directory contains tiff and tfw files generated from the multibeam data. Subdirectory 4_Multibeam_2000: Subdirectory Bathymetry: This directory contains contours generated from the multibeam data. Subdirectory Grids: This directory contains bathymetric and backscatter grids generated from the multibeam data. Subdirectory Imagery: This directory contains tiff and tfw files generated from the multibeam data. Subdirectory 5_Disposal_Locations: Subdirectory Areas: This directory contains shapefiles that delineate areas within the Historic Area Remediation Site used for analysis in this report. Subdirectory USACE_Disposal: This directory contains files that delineate areas where material was placed by the U.S. Army Corps of Engineers. Subdirectory 6_Sediments: This directory contains shapefiles that show the locations of sediment samples in the study region. Subdirectory 7_Calculations: This directory contains the results generated from computing the differences between bathymetric and backscatter grids from different years. Subdirectory 8_Misc: This directory contains bathymetric data derived from the NOAA NGDC Coastal Relief Model. Subdirectory 9_Legends: This directory contains legends used in the Arcview project. Subdirectory Scripts: This directory contains several scripts that are useful for exploring the Arcview project. These scripts need to be placed into your Arcview directory. DISCLAIMER This Digital Versatile Disc-Read Only Memory (DVD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published on this DVD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.