TY - GEN
T1 - Sharp spatially-decoupled inversion of airborne electromagnetic data for improved model integration
AU - Fiandaca, G.
AU - Kirkegaard, C.
AU - Foged, N.
AU - Christiansen, A. V.
AU - Auken, E.
PY - 2015
Y1 - 2015
N2 - One of the main limiting factors to the accuracy of large scale groundwater models is the scarcity of hydraulic data. High-resolution Airborne Electromagnetic Methods (AEM) are capable of mapping the electrical resistivity structure of the subsurface in great detail and covering large areas in short time and on a limited budget. As such, there is great potential in integrating AEM data in groundwater modeling as a supplementing source of an extensive amount of information. We have developed several novel techniques that in combination allows for bringing groundwater and AEM models much closer together, i.e.: (1) a novel, scalable inversion engine that allows the AEM inversion to handle arbitrarily large areas at a time; (2) the spatially-decoupled inversion approach, which decouples the inversion model from the acquisition points and can operate on the same grid/voxel cells as the groundwater model; (3) a custom regularization scheme that allows for producing geophysical models with sharp vertical/horizontal resistivity transitions. In this study we present the very first application of the sharp spatially-decoupled inversion on an AEM survey flown for improving the groundwater model in the Kasted area, in the north of Aarhus (Denmark).
AB - One of the main limiting factors to the accuracy of large scale groundwater models is the scarcity of hydraulic data. High-resolution Airborne Electromagnetic Methods (AEM) are capable of mapping the electrical resistivity structure of the subsurface in great detail and covering large areas in short time and on a limited budget. As such, there is great potential in integrating AEM data in groundwater modeling as a supplementing source of an extensive amount of information. We have developed several novel techniques that in combination allows for bringing groundwater and AEM models much closer together, i.e.: (1) a novel, scalable inversion engine that allows the AEM inversion to handle arbitrarily large areas at a time; (2) the spatially-decoupled inversion approach, which decouples the inversion model from the acquisition points and can operate on the same grid/voxel cells as the groundwater model; (3) a custom regularization scheme that allows for producing geophysical models with sharp vertical/horizontal resistivity transitions. In this study we present the very first application of the sharp spatially-decoupled inversion on an AEM survey flown for improving the groundwater model in the Kasted area, in the north of Aarhus (Denmark).
UR - http://www.scopus.com/inward/record.url?scp=84956621233&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.201413884
DO - 10.3997/2214-4609.201413884
M3 - Conference article in proceedings
AN - SCOPUS:84956621233
T3 - 1st European Airborne Electromagnetics Conference - Held at Near Surface Geoscience 2015
SP - 118
EP - 122
BT - 1st European Airborne Electromagnetics Conference - Held at Near Surface Geoscience 2015
PB - European Association of Geoscientists and Engineers
T2 - 1st European Airborne Electromagnetics Conference
Y2 - 6 September 2015 through 10 September 2015
ER -