Locations of Sea-Floor Photographs Acquired During U.S. Geological Survey (USGS) Cruises 2009-059-FA and 2010-010-FA Off the Entrance to the Connecticut River in Eastern Long Island Sound (H12013_BOTPHOTOS.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）联合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），正开展长岛湾沿岸海底详细地质图的编制工作。最初由NOAA为海图绘制任务采集的水深测量数据与侧扫声呐图像，为长岛湾的科研与管理工作提供了核心基础框架，可清晰反映海床的组成与地形特征，同时可提供沉积物运移及底栖生境相关研究信息。2009年4月至5月，NOAA完成了康涅狄格河入海口近海的水文测量任务H12013；2009年11月及2010年4月，研究团队针对该区域开展两次地面验证踏勘调查，同步获取了海底照片与表层沉积物数据。研究人员基于多波束测深仪数据与用于验证的实地校验数据，构建了两个解释性数据图层。如需了解实地校验调查的更多细节，可访问以下链接：http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-059-FA 及 http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-010-FA