These induced currents create differences in potential between pipelines and the surrounding soil which interfere with electrical surveys of the pipe and produce conditions where corrosion may occur.
Taken as a whole, the results of this study support the view that a suite of carefully designed electrical surveys (DC, MT, and SP) may be employed to infer favorable subsurface geothermal reservoir characteristics.
The work reported here was undertaken to test the utility of electrical surveys for geothermal reservoir characterization using existing exploration and well data sets from the operating Beowawe geothermal field located in the Basin and Range Province of western USA.
Geophysical electrical surveys with four electrodes configuration, i.e., Wenner and Schlumberger method, were carried out at the same selected sites to observe the similarity and compared both the applications in terms of its use and handling in the field.
Open image in new window Fig. 10 Expected distribution map for water depth in the site using depth to water inferred from geo-electrical survey data from Table 1.
These features are consistent with the results from previous electrical resistivity surveys (DC surveys) by the MRSO ([1969], [1970], [1971], [1973]) and VLF-MT surveys by Kagiyama et al. ([2010]).
It is notable that in the late 1960s to early 1970s, the Mining Research and Service Organization (MRSO [1969], [1970], [1971], [1973]) conducted extensive electrical resistivity surveys (DC surveys) to obtain the spatial distribution of apparent resistivity in the TVG for the purpose of commercial use of its geothermal energy.
This study demonstrates the relevant of electrical resistivity survey in the investigation of the subsurface characteristics which have influence on groundwater repositories and the findings are valuable tools for groundwater management.
First, we conducted field investigations from 2012 to 2016, mainly based on both soil (EC1/5) and water (ECw) electrical conductivity survey.
