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ESTIMATION OF TEMPORAL CHANGES IN SOIL MOISTURE USING RESISTIVITY METHOD
Author(s) -
GOYAL V. C.,
GUPTA P. K.,
SETH S. M.,
SINGH V. N.
Publication year - 1996
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/(sici)1099-1085(199609)10:9<1147::aid-hyp366>3.0.co;2-s
Subject(s) - electrical resistivity and conductivity , water content , soil science , inversion (geology) , depth sounding , moisture , vertical electrical sounding , geology , mineralogy , environmental science , geotechnical engineering , materials science , geomorphology , groundwater , composite material , aquifer , oceanography , engineering , structural basin , electrical engineering
The temporal variation in a soil moisture profile can be studied using resistivity sounding data acquired at different times. The layered earth model based estimation of soil moisture from apparent resistivity data is a two‐step non‐linear inversion. Firstly, the apparent resistivity data are inverted to derive the layer resistivity variations and thicknesses and, secondly, the moisture content is estimated from these layer resistivity variations using a calibration equation. The soil moisture–resistivity problem was studied using the one‐dimensional formulation of resistivity problem. A generalized geoelectric earth model was considered to simulate the soil moisture distribution and its temporal variation in the unsaturated zone. An algorithm (RESMOS) for the interpretation of the apparent resistivity data in terms of soil moisture variations through this two‐step inversion process is reported.