Ground-truthing Electrical Resistivity Methods in Support of Submarine Groundwater Discharge Studies: Examples from Hawaii, Washington, and California
Ground-truthing Electrical Resistivity Methods in Support of Submarine Groundwater Discharge Studies: Examples from Hawaii, Washington, and California
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DOI：
10.2113/jeeg20.1.81
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发表时间：
2013-03
影响因子：
1
通讯作者：
Cordell D. Johnson;P. Swarzenski;C. Richardson;Christopher G. Smith;K. Kroeger;P. Ganguli
中科院分区：
文献类型：
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作者：
Cordell D. Johnson;P. Swarzenski;C. Richardson;Christopher G. Smith;K. Kroeger;P. Ganguli
摘要海底地下水排泄是连接陆地和海洋环境的重要管道。SGD将水和水中的成分输送到沿海水域，在那里这些流入可能会影响近岸生态系统的健康和可持续性。多道电阻率技术已被证明是研究SGD和SGD作用力的尺度和动力学的有力工具。然而，为了最大限度地发挥这一工具在河口或海洋环境中的有效性，必须解决数据采集和数据处理方面的不确定性。这些问题最常与辨别通过也可能是高传导性的可变饱和介质(即海水)的电流的细微差别有关。这项研究考察了三个不同的野外场地，通过将电阻率数据与直接盐度和电阻率观测进行比较，量化岩性变化，来评估不同沿海环境下电阻率技术的有效性。
ABSTRACT Submarine groundwater discharge (SGD) is an important conduit that links terrestrial and marine environments. SGD conveys both water and water-borne constituents into coastal waters, where these inflows may impact near-shore ecosystem health and sustainability. Multichannel electrical resistivity techniques have proven to be a powerful tool to examine scales and dynamics of SGD and SGD forcings. However, there are uncertainties both in data aquisition and data processing that must be addressed to maximize the effectiveness of this tool in estuarine or marine environments. These issues most often relate to discerning subtle nuances in the flow of electricity through variably saturated media that can also be highly conductive (i.e., seawater). Three contrasting field sites were examined for this study to assess the effectiveness of electrical resistivity techniques in varying coastal settings by comparing resistivity data to direct salinity and resistivity observations, quantifying changes in litho...