CON_5M: 5-meter contours produced from bathymetric data collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, MA, 2007 (ESRI POLYLINE SHAPEFILE)

The USGS Woods Hole Science Center conducted a nearshore geophysical survey offshore of the southern coast of Martha's Vineyard, in the vicinity of the Martha's Vineyard Coastal Observatory (MVCO) in August 2007. This mapping program was part of a larger research effort supporting the Office of Naval Research (ONR) Ripples Directed-Research Initiative (DRI) studies at MVCO by providing data collection and modeling. The geophysical data will be used to provide initial conditions for wave and circulation models for the study area. Ultimately, geophysical mapping, oceanographic measurements and modeling will help to improve our understanding of coastal sediment-transport processes. The geophysical mapping utilized a suite of high-resolution instrumentation to map the surficial sediment distribution, depth and sub-surface geology: dual-frequency 100/500 KHz sidescan-sonar system, 234-KHz interferometric sonar, and 500 Hz -12 KHz chirp sub-bottom profiler. The survey was conducted aboard the M/V Megan Miller August 9-13, 2007. The study area covers 35 square kilometers from about 0.2 km to 5-km offshore of the south shore of Martha's Vineyard, and ranges in depth from ~ 5 to 20 meters.美国地质调查局（United States Geological Survey, USGS）伍兹霍尔科学中心（Woods Hole Science Center）于2007年8月在马萨葡萄园岛南岸近岸海域，即马萨葡萄园岛海岸观测站（Martha's Vineyard Coastal Observatory, MVCO）周边区域，开展了一项近岸地球物理勘测工作。本次测绘项目隶属于一项大型研究计划，旨在通过数据采集与建模工作，支撑美国海军研究办公室（Office of Naval Research, ONR）在MVCO开展的“涟漪”定向研究计划（Ripples Directed-Research Initiative, DRI）相关研究。本次获取的地球物理数据将为该研究区域的波浪与环流模型提供初始场条件。最终，地球物理测绘、海洋学观测与建模工作将有助于深化我们对海岸泥沙输运过程的认知。 本次地球物理测绘采用了一套高分辨率探测仪器，用于绘制表层沉积物分布、水深及地下地质结构：双频100/500千赫侧扫声呐系统、234千赫干涉声呐，以及500赫兹至12千赫啁啾声亚底剖面仪。勘测工作于2007年8月9日至13日在“梅根·米勒”号（M/V Megan Miller）作业船上完成。研究区域覆盖马萨葡萄园岛南岸离岸0.2公里至5公里范围，总面积35平方公里，水深约5至20米。