Bathymetry of the Historic Area Remediation Site in 1998 (3-m resolution Esri binary grid and 32-bit GeoTIFF, 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，科研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（Canadian Coast Guard Ship Frederick G. Creed）的Simrad EM1000多波束测深仪（multibeam echosounder），对纽约与新泽西州近海的历史区域修复场址（Historic Area Remediation Site，HARS）开展海底水深测量与后向散射强度调查。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过程中，按时间序列绘制海底地形与表层沉积物的空间分布。基于多波束调查数据生成的地图产品包含三类：空间分辨率达3米的海底水深图、阴影浮雕水深图，以及用于表征海底质地与粗糙度特征的后向散射强度图。本次调查由美国地质调查局（U.S. Geological Survey）联合美国陆军工程兵团实施，并获得加拿大水文局（Canadian Hydrographic Service）与新不伦瑞克大学（University of New Brunswick）的技术支持。