Ship Trackline along which Continuous Resistivity Profile Data were Collected in the Corsica River Estuary, Maryland on May 17, 2007 on USGS Cruise 07005 (RESGPSLNS_JD137.SHP)

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: https://cmgds.marine.usgs.gov/fan_info.php?fan=2007-005-FA.

海底地下水排泄（Submarine Groundwater Discharge, SGD）进入马里兰州科西嘉河河口的相关研究，是一项更大规模研究的组成部分，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。自然资源管理人员担忧，来自这个以农业为主的流域的海底地下水排泄所携带的营养盐进入河口后，可能会引发富营养化、有害藻华以及鱼类死亡事件。跨学科的美国地质调查局（U.S. Geological Survey, USGS）科研团队于2007年4月至5月在该河口开展了野外作业，所用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时间序列数据采集。更深入地了解地下水排泄的模式、分布位置与速率，有助于优化科西嘉河河口及其他类似区域的河口营养盐过度富集相关模型与缓解策略。有关本次野外工作的更多信息，可通过伍兹霍尔海岸与海洋科学中心野外活动网页获取：https://cmgds.marine.usgs.gov/fan_info.php?fan=2007-005-FA。