Surficial Sediment Data Collected During U.S. Geological Survey Cruises 2009-050-FA and 2010-010-FA Off the Entrance to the Connecticut River in Eastern Long Island Sound (H12013_SEDDATA.SHP, Geographic, WGS84)

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Connecticut Department of Energy and Environmental Protection (CT DEEP), is producing detailed geologic maps of the coastal sea floor. Bathymetry and sidescan-sonar imagery, originally collected by NOAA for charting purposes, provide a fundamental framework for research and management activities in Long Island Sound, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. During April-May 2009 NOAA completed hydrographic survey H12013 offshore of the entrance to the Connecticut River, and during November 2009 and April 2010 bottom photographs and surficial sediment data were acquired as part of two ground-truth reconnaissance surveys of this area. Two interpretive data layers were derived from the multibeam echo-sounder and the ground-truth data used to verify them. For more information on the ground-truth surveys see: http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-059-FA and http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-010-FA

美国地质调查局（U.S. Geological Survey, USGS）与美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）以及康涅狄格州能源与环境保护部（Connecticut Department of Energy and Environmental Protection, CT DEEP）合作，正在开展沿海海底详细地质图的绘制工作。最初由NOAA为海图编制目的采集的水深测量（bathymetry）数据与侧扫声呐（sidescan-sonar）图像，为长岛海湾（Long Island Sound）的科研与管理活动提供了核心基础框架，可直观展示海床的物质组成与地形特征，并可提供沉积物运移及底栖生境（benthic habitat）相关的关键信息。2009年4月至5月期间，NOAA完成了康涅狄格河入海外侧海域的水文测量（hydrographic survey）任务H12013；2009年11月与2010年4月，研究团队在该区域的两项地面验证（ground-truth）勘察调查中，采集了海底照片（bottom photographs）与表层沉积物数据（surficial sediment data）。研究人员基于多波束回声测深仪（multibeam echo-sounder）获取的数据，以及用于验证数据可靠性的地面调查结果，生成了两个解释性数据图层。如需了解地面验证调查的更多详情，请访问以下链接：http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-059-FA 与 http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-010-FA