TY  - JOUR
AU  - Lambot, S.
AU  - Slob, E. C.
AU  - Chavarro, D.
AU  - Lubczynski, M.
AU  - Vereecken, H.
TI  - Measuring soil surface water content in irrigated areas of southern Tunisia using full-waveform inversion of proximal GPR data
JO  - Near surface geophysics
VL  - 6
SN  - 1569-4445
CY  - Houten
PB  - EAGE
M1  - PreJuSER-1745
SP  - 403 - 410
PY  - 2008
N1  - Record converted from VDB: 12.11.2012
AB  - Full-waveform inverse modelling of proximal ground-penetrating radar was used to measure Soil Surface water content in irrigated areas of southern Tunisia. The ground-penetrating radar system consisted of a hand held vector network analyser combined with an off-ground monostatic horn antenna, thereby setting up an ultra wideband stepped-frequency continuous-wave radar. Inversion of the radar Green's function was performed in the time-domain, on a time window focused on the surface reflection only. Results were compared with volumetric and time-domain reflectometry measurements, as well as with an improved version of the standard reflection coefficient method. Except for water contents close to saturation, good agreements were obtained between ground-penetrating radar, time-domain reflectometry and volumetric samples. Significant differences were observed when the soil electric conductivity was high and Could not be neglected anymore in the inversion process. Accounting for electric conductivity provided better results. Remaining errors were attributed to the different scales of characterization dealt with in relation to the vertical variability of water content in the top few centimetres of the soil. The proposed method appears to be more practical and accurate than the standard reflection coefficient method and shows great promise for real-time mapping of surface soil moisture at the field scale.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000261736100007
UR  - https://juser.fz-juelich.de/record/1745
ER  -