GeoTIFF image of the shaded-relief bathymetry of the sea floor, colored by backscatter intensity, of the Historic Area Remediation Site in 2000 (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年及2000年，研究团队依托搭载于加拿大海岸警卫队"弗雷德里克·G·克里德"号科考船的Simrad EM1000型多波束测深仪，对纽约与新泽西州外海的历史区域修复场址（Historic Area Remediation Site，HARS）开展海底地形测量与背散射强度调查。本次多波束测深调查的核心目标为：在疏浚物料被投放至HARS以修复受污染沉积物的全过程中，实时绘制海底地形与表层沉积物的时空变化图谱。基于多波束调查数据生成的专题地图以3米的空间分辨率，呈现了海底地形、晕渲海底地形图以及背散射强度——后者为表征海底纹理与粗糙度的量化指标。本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完成，并得到加拿大水文局与新不伦瑞克大学的技术支持。