Navigation and Bathymetry Points of Ship Position During Continuous Resistivity Profile Data Collection in the Potomac River/Chesapeake Bay on Sept. 6, 2006 on USGS Cruise 06018 (RESGPSPNTS_JD249.SHP)

In order to test hypotheses about groundwater flow under and into Chesapeake Bay, geophysical surveys were conducted by U.S. Geological Survey (USGS) scientists on Chesapeake Bay and the Potomac River Estuary in September 2006. Chesapeake Bay resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge, which are contributing to eutrophication. The USGS has performed many related studies in recent years to provide managers with information necessary to make informed decisions about this issue. The research carried out as part of the study described here was designed to help refine nutrient budgets for Chesapeake Bay by characterizing submarine groundwater flow and discharge of groundwater beneath part of the mainstem and a major tributary, the Potomac River Estuary.为验证切萨皮克湾下方及汇入该海湾的地下水流动相关假说，美国地质调查局（U.S. Geological Survey, USGS）的科研人员于2006年9月在切萨皮克湾与波托马克河河口开展了地球物理勘测工作。切萨皮克湾的资源管理者对通过海底地下水排泄进入河口的营养物质深感忧虑，此类物质正加剧水体富营养化。近年来，美国地质调查局已开展多项相关研究，为管理者提供制定该议题相关知情决策所需的必要信息。本研究相关的科研工作旨在通过刻画切萨皮克湾主航道部分区域及主要支流波托马克河河口下方的海底地下水流动与排泄特征，助力完善切萨皮克湾的营养盐收支核算。