CatIsland 2010 single-beam bathymetry tracklines

In September and October of 2010, the U.S. Geological Survey (USGS), in cooperation with the Army Corps of Engineers (USACE), conducted geophysical surveys around Cat Island, Miss. to collect bathymetry, acoustical backscatter, and seismic reflection data (seismic-reflection data have been published separately, Forde and others, 2012). The geophysical data along with sediment vibracore data (yet to be published) will be integrated to analyze and produce a report describing the geomorphology and geologic evolution of Cat Island. Interferometric swath bathymetry, and acoustical backscatter data were collected aboard the RV G.K. Gilbert during the first cruise which took place September 7-15, 2010. Single-beam bathymetry was collected in very shallow water around the island aboard the RV Streeterville from September 28 through October 2, 2010 to bridge the gap between the landward limit of the previous cruise and the shoreline. The survey area extended from the nearshore to approximately 5 kilometers (km) offshore to the north, south, and west, and approximately 2 km to the east. This report archives bathymetry and acoustical backscatter data and provides information and mapping products essential for completion of the project goals. The bathymetry will provide elevations and show geomorphic characteristics of the seafloor, while the backscatter and acoustical backscatter imagery will enhance the geomorphic characteristics and give insight to variations of sediment types on the seafloor. This file contains the trackline locations and names of the single-beam bathymetry around Cat Island, Miss.

2010年9月至10月，美国地质调查局（U.S. Geological Survey, USGS）与美国陆军工程兵团（Army Corps of Engineers, USACE）合作，在密西西比州卡特岛周边开展地球物理勘探，采集海底测深（bathymetry）、声学背散射（acoustical backscatter）及地震反射数据（地震反射数据已由Forde等人2012年单独刊布）。本次获取的地球物理数据将与尚未刊布的沉积物振动岩芯数据整合，用于分析并撰写报告，阐明卡特岛的地貌形态与地质演化历程。
2010年9月7日至15日的第一航次搭载“G.K.吉尔伯特号”（RV G.K. Gilbert）科考船，采集了干涉条带测深与声学背散射数据；2010年9月28日至10月2日，为填补前次航次向岸边界与海岸线之间的空白，科考团队搭载“斯特里特维尔号”（RV Streeterville）在卡特岛周边极浅水区采集了单波束水深测量数据。
本次勘探范围覆盖近岸至离岸区域：北、南、西三向离岸距离约5千米，东向离岸距离约2千米。
本报告对本次采集的海底测深与声学背散射数据进行归档，并提供支撑项目目标达成所需的信息与制图产品。海底测深数据可反映海底高程与地貌特征，而声学背散射影像则可强化海底地貌特征的辨识度，并揭示海底沉积物类型的空间差异。
本文件包含密西西比州卡特岛周边单波束水深测量的测线位置与相关命名信息。