GeoTIFF image of the shaded-relief bathymetry of the sea floor, colored by backscatter intensity, of the Historic Area Remediation Site in 1998 (3-m resolution, Mercator, WGS 84)

Surveys of the bathymetry and backscatter intensity of the sea floor of the Historic Area Remediation Site (HARS), offshore of New York and New Jersey, were carried out in 1996, 1998, and 2000 using a Simrad EM1000 multibeam echosounder mounted on the Canadian Coast Guard ship Frederick G. Creed. The objective of the multiple echosounder surveys was to map the bathymetry and surficial sediments over time as dredged material was placed in the HARS to remediate contaminated sediments. Maps derived from the multibeam surveys show sea-floor bathymetry, shaded-relief bathymetry, and backscatter intensity (a measure of sea-floor texture and roughness) at a spatial resolution of 3 meters. The area was mapped by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers and with support from the Canadian Hydrographic Service and the University of New Brunswick.

1996年、1998年与2000年，研究团队搭载安装于加拿大海岸警卫队“弗雷德里克·G·克里德”号的Simrad EM1000多波束测深仪（multibeam echosounder），对纽约与新泽西州外海的历史区域修复场址（Historic Area Remediation Site，HARS）开展海底水深地形与后向散射强度（backscatter intensity）调查。本次多波束测深调查的目标，是在疏浚物料（dredged material）被投放至HARS以修复受污染沉积物的过程中，动态测绘水深地形与表层沉积物（surficial sediments）的时空分布特征。本次多波束调查生成的地图，展示了空间分辨率为3米的海底水深地形、晕渲水深地形（shaded-relief bathymetry）以及后向散射强度——该指标用于表征海底质地与粗糙度。该海域的测绘工作由美国地质调查局（U.S. Geological Survey）联合美国陆军工程兵团（U.S. Army Corps of Engineers）开展，并得到了加拿大水文局（Canadian Hydrographic Service）与新不伦瑞克大学（University of New Brunswick）的支持。