GeoTIFF image of the backscatter intensity of the sea floor 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年与2000年，研究团队使用安装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）开展了海底水深与反向散射强度测量调查。本次多波束测深调查的核心目标，是在疏浚物料被投放至HARS以修复受污染海底沉积物的全过程中，按时间序列绘制海底水深与表层沉积物的空间分布情况。由多波束调查生成的地图以3米的空间分辨率，展示了海底水深图、阴影晕渲水深图以及反向散射强度图——反向散射强度是表征海底质地与粗糙度的量化指标。本次海域测绘工作由美国地质调查局联合美国陆军工程兵团共同实施，并得到加拿大水文局与新不伦瑞克大学的支持。