Grayscale GeoTIFF Image of the Bathymetry of National Oceanic and Atmospheric Administration (NOAA) Survey H11321 in Central Rhode Island Sound (H11321_UTM.TIF, UTM Zone 19)

The United States Geological Survey (USGS) is working cooperatively with the National Oceanic and Atmospheric Administration (NOAA) to interpret the surficial geology in estuaries along the coast of the northeastern United States. The purpose of our present study is to define the sea floor morphology and sedimentary environments in an area of central Rhode Island Sound using sidescan-sonar imagery, bathymetry data, and seismic records. The mosaic, bathymetry, and their interpretations serve many purposes, including: (1) defining the geological variability of the sea floor, which is one of the primary controls of benthic habitat diversity; (2) improving our understanding of the processes that control the distribution and transport of bottom sediments and the distribution of benthic habitats and associated infaunal community structures; and (3) providing a detailed framework for future research, monitoring, and management activities. The sidescan-sonar mosaics and bathymetry images also serve as base maps for subsequent sedimentological, geochemical, and biological observations, because precise information on environmental setting is important for selection of sampling sites and for accurate interpretations of point measurements.

美国地质调查局（United States Geological Survey，USGS）与美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA）开展合作，对美国东北海岸沿线河口的表层地质进行解译。本研究旨在利用侧扫声呐（sidescan-sonar）影像、测深数据（bathymetry data）及地震记录，明确罗德岛海峡（Rhode Island Sound）中部区域的海底地貌与沉积环境。该拼接影像、测深数据及其解译成果可服务于多项核心用途：（1）刻画海底地质变异性——这是底栖生境多样性的关键控制因素之一；（2）深化对控制底沉积物分布与输运、底栖生境分布及相关底内群落结构的过程的认知；（3）为后续研究、监测与管理活动提供精细化的研究框架。侧扫声呐拼接影像与测深影像同时可作为后续沉积学、地球化学及生物学观测的基础底图，因环境背景的精确信息对采样点位选取及单点测量结果的精准解译均至关重要。