Trimmed Processed Continuous Resistivity Point Data from Cape Cod National Seashore, Feb. 28, 2006

Continuous resistivity profiling (CRP) surveys were conducted at Cape Cod National Seashore in 2004 and 2006 in order to test hypotheses about groundwater flow under and into estuaries and the Atlantic Ocean. Coastal resource managers here and elsewhere are concerned about nutrients that are entering coastal waters via submarine groundwater discharge, which are contributing to eutrophication and harmful algal blooms. CRP is used to measure electrical resistivity of sediments, a property that is sensitive to differences in salinity of submarine ground water. The 2004 and 2006 surveys used floating resistivity streamers of 100 m and 50 m respectively. The depth penetration of the streamers is approximately 20% of the streamer length which translates to approximately 20-25 m with the 100 m streamer and 12-14 m with the 50 m streamer. These data were processed using AGI's EarthImager 2D software.

为验证关于河口下方及注入河口与大西洋的地下水流动的相关假说，研究团队于2004年与2006年在科德角国家海岸开展了连续电阻率剖面（Continuous Resistivity Profiling, CRP）测量工作。当地及其他地区的沿海资源管理者均关注通过海底地下水排泄进入近岸海域的营养盐，此类营养盐会加剧水体富营养化并引发有害藻华。CRP可用于测量沉积物的电阻率，该物理属性对海底地下水的盐度差异具有较高敏感性。2004年与2006年的测量分别使用了长度为100米与50米的漂浮式电阻率拖缆。该类拖缆的探测深度约为其自身长度的20%：100米拖缆对应的探测深度约为20至25米，50米拖缆则约为12至14米。所有数据均通过AGI公司的EarthImager 2D软件进行处理。