TY  - JOUR
AU  - Popp, S.
AU  - Altdorff, Daniel
AU  - Dietrich, P.
TI  - Assessment of shallow subsurface characterisation with non-invasive geophysical methods at the intermediate hill-slope scale
JO  - Hydrology and earth system sciences
VL  - 17
IS  - 4
SN  - 1607-7938
CY  - Katlenburg-Lindau
PB  - EGU
M1  - FZJ-2013-02640
SP  - 1297 - 1307
PY  - 2013
AB  - Hill-slopes of several hectares in size represent a  difficult scale for subsurface characterisation, as these landscape  units are well beyond the scope of traditional pointscale  techniques. By means of electromagnetic induction  (EMI) and gamma-ray spectroscopy, spatially distributed soil  proxy data were collected from a heterogeneous hill-slope  site. Results of EMI mapping using the EM38DD showed  that soil electrical conductivity (ECa) is highly variable at  both temporal and spatial scales. Calibration of the integral  ECa signal to a specific target like soil moisture is hampered  by the ambiguous response of EMI to the clay-rich hill-slope  underground. Gamma-ray results were obtained during a single  survey, along with EMI measurements and selected soil  sampling. In contrast to ECa, a noticeable correlation between  Total Count and K emission data and soil-water content  seemed to be present. Relevant proxy variables from  both methods were used for k means clustering in order to  distinguish between hill-slope areas with different soil conditions.  As a result, we obtained a suitable partition of hillslope  that was comparable with a previously obtained zonation  model based on ecological factors.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000318440800003
DO  - DOI:10.5194/hess-17-1297-2013
UR  - https://juser.fz-juelich.de/record/134441
ER  -