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（Canadian Coast Guard ship Frederick G. Creed）的Simrad EM1000多波束测深仪，对纽约与新泽西州近海的历史区域修复场址（Historic Area Remediation Site，简称HARS）开展海底地形测深与背散射强度调查。本次多波束测深调查的核心目标为：在通过向HARS投放疏浚物料以修复受污染沉积物的过程中，对海底地形与表层沉积物进行长期动态监测制图。由多波束调查生成的系列地图以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——该指标可用于表征海底的纹理与粗糙度。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，并得到加拿大水文局与新不伦瑞克大学的支持。