Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
Streaming current signals associated with pumping test experiments. / Titov, K. V.
23rd European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists and Engineers, 2017.Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
}
TY - GEN
T1 - Streaming current signals associated with pumping test experiments
AU - Titov, K. V.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Self-Potential (SP) signals of the electrokinetic origin can be detected in the course of pumping test experiments. SP signals provide useful information about space heterogeneity of hydraulic properties of aquifers. SP signals are recorded with multi-voltmeters and a number of non-polarizing electrodes located around the pumping well to compliment information provided by drawdown measurements in pumping and observation wells. However, to the best of our knowledge, the streaming current (SC) has never been measured at pumping test experiments. We recorded the current in the course of a pumping test of shallow low-permeable aquifer using an ammeter connected to two electrodes grounded to the pumping interval of the well and to the ground surface. The recorded signal contains two components: (i) of electrochemical origin, produced by different physical-chemical properties at the interfaces of the two measuring electrodes; and (ii) of electrokinetic origin, produced by SC coupled with the groundwater flow. We decoupled the SC signal from the total signal. We found a correlation between SC and the flowrate, and we obtained the respective best fit. Based on the fit slope and the hydraulic conductivity value we calculated the SC coupling coefficient value, which is in reasonable agreement with published data.
AB - Self-Potential (SP) signals of the electrokinetic origin can be detected in the course of pumping test experiments. SP signals provide useful information about space heterogeneity of hydraulic properties of aquifers. SP signals are recorded with multi-voltmeters and a number of non-polarizing electrodes located around the pumping well to compliment information provided by drawdown measurements in pumping and observation wells. However, to the best of our knowledge, the streaming current (SC) has never been measured at pumping test experiments. We recorded the current in the course of a pumping test of shallow low-permeable aquifer using an ammeter connected to two electrodes grounded to the pumping interval of the well and to the ground surface. The recorded signal contains two components: (i) of electrochemical origin, produced by different physical-chemical properties at the interfaces of the two measuring electrodes; and (ii) of electrokinetic origin, produced by SC coupled with the groundwater flow. We decoupled the SC signal from the total signal. We found a correlation between SC and the flowrate, and we obtained the respective best fit. Based on the fit slope and the hydraulic conductivity value we calculated the SC coupling coefficient value, which is in reasonable agreement with published data.
UR - http://www.scopus.com/inward/record.url?scp=85039851896&partnerID=8YFLogxK
M3 - Conference contribution
BT - 23rd European Meeting of Environmental and Engineering Geophysics
PB - European Association of Geoscientists and Engineers
T2 - 23rd European Meeting of Environmental and Engineering Geophysics
Y2 - 3 September 2017 through 7 September 2017
ER -
ID: 36007717