Modified Processed Continous Resistivity Profile Data Collected in the Corsica River Estuary, Maryland on May 15 and May 16 on USGS Cruise 07005

Submarine groundwater discharge (SGD) into Maryland's Corsica River Estuary was investigated as part of a larger study to determine the importance of nutrient delivery to Chesapeake Bay via this pathway. Resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge from this primarily agricultural watershed that may be contributing to eutrophication, harmful algal blooms, and fish kills. An interdisciplinary U.S. Geological Survey (USGS) science team conducted field operations in the estuary in April and May 2007. Techniques used included continuous resistivity profiling (CRP), piezometer sampling, seepage meter measurements, and collection of a radon tracer time series. Better understanding of the style, locations, and rates of groundwater discharge could lead to improved models and mitigation strategies for estuarine nutrient over-enrichment in the Corsica River Estuary, and other similar settings. More information on the field work can be accessed from the Woods Hole Coastal and Marine Science Center Field Activity webpage: <http://quashnet.er.usgs.gov/data/2007/07005/>

海底地下水排泄（Submarine Groundwater Discharge, SGD）流入马里兰州科西卡河河口的相关调查，是一项更大尺度研究的组成部分，该研究旨在明确通过该途径向切萨皮克湾输送营养盐的重要性。资源管理者对此深感担忧：这个以农业为主的流域通过海底地下水排泄进入河口的营养盐，可能会加剧水体富营养化、有害藻华及鱼类死亡事件。美国地质调查局（U.S. Geological Survey, USGS）的跨学科科学团队于2007年4月与5月在该河口开展了野外作业，所采用的技术包括连续电阻率剖面法（Continuous Resistivity Profiling, CRP）、孔隙水压力计采样、渗流仪测量以及氡示踪剂时间序列采集。更清晰地掌握地下水排泄的模式、分布点位与速率，可助力优化科西卡河河口及其他类似区域的河口营养盐过度富集问题的模型构建与减缓策略。更多野外作业相关信息可通过伍兹霍尔海岸与海洋科学中心野外活动网页获取：<http://quashnet.er.usgs.gov/data/2007/07005/>