Birkhauser Verlag Basel;Cham: Springer International Publishing
摘要:
摘要： Electrical Resistivity Imaging (ERI) was carried out continuously for 10 days to map the subsurface resistivity distribution along a potentially hazardous hillslope at the Jieshou Junior High School in Taoyuan, Taiwan. The reliability of the inverted resistivity structures down to about 25 m depth was examined with synthetic modeling using the same electrode arrangements installed on land surface as in field surveys, together with a DOI (depth-of-investigation) index calculated from the ERI data. The subsurface resistivity distribution is consistent with results from well logging. These ERI recordings were taken daily and provided highly resolved imagery of the resistivity distribution underground and illustrated the dynamical fluid-flow behavior due to heavy rainfall infiltration. Using Archie’s law, the resistivity distribution was transformed into a map of relative water saturation (RWS), which is strongly correlated with the rainfall infiltration process. We then found that the averaged RWS is significantly correlated with daily precipitation. Our observations indicate that time-lapse ERI is effective in monitoring subterraneous rainfall infiltration; moreover, the preferential flow paths can be delineated according to the changes in averaged RWS derived from the ERI data. 其他題名： Pure Appl. Geophys 出版者： Cham: Springer International Publishing 出版日期： 2016-06 出處： Pure and applied geophysics, 2016-06, Vol.173 (6), p.2227-2239 資源來源： Agricultural & Environmental Science Collection 版權： Springer International Publishing 2016 識別號： ISSN: 0033-4553 識別號： EISSN: 1420-9136 識別號： DOI: 10.1007/s00024-016-1251-x
