Browsing Norwegian Geotechnical Institute (NGI) Digital Archive by Author "Christensen, Craig"
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AEM in norway: A review of the coverage, applications and the state of technology
Harrison, Edward J.; Baranwal, Vikas Chand; Pfaffhuber, Andreas Aspmo; Christensen, Craig; Skudal, Guro H.; Rønning, Jan Steinar; Anschütz, Helgard; Brönner, Marco (Peer reviewed; Journal article, 2021) -
Combining airborne electromagnetic and geotechnical data for automated depth to bedrock tracking
Christensen, Craig; Pfaffhuber, Andreas Aspmo; Anschütz, Helgard; Smaavik, Tone Fallan (Journal article, 2015)Airborne electromagnetic (AEM) survey data was used to supplement geotechnical investigations for a highway construction project in Norway. Heterogeneous geology throughout the survey and consequent variable bedrock threshold ... -
Hydrogeological characterization of an alpine aquifer system in the Canadian Rocky Mountains
Christensen, Craig; Hayashi, Masaki; Bentley, Laurence R. (Peer reviewed; Journal article, 2020)Groundwater storage in alpine regions is essential for maintaining baseflows in mountain streams. Recent studies have shown that common alpine landforms (e.g., talus and moraine) have substantial groundwater storage capacity, ... -
Integrated bedrock model combining airborne geophysics and sparse drillings based on an artificial neural network
Lysdahl, Asgeir Olaf Kydland; Christensen, Craig; Pfaffhuber, Andreas Aspmo; Vöge, Malte; Andresen, Lars; Skudal, Guro H.; Panzner, Martin (Peer reviewed; Journal article, 2021)Cost overruns caused by unforeseen geological challenges are commonplace for large infrastructure projects. Thorough ground investigations can reduce this risk, but geotechnical drillings and laboratory test are expensive ... -
Peatland Volume Mapping over Resistive Substrates with Airborne Electromagnetic Technology
Silvestri, Sonia; Christensen, Craig; Lysdahl, Asgeir Olaf Kydland; Anschütz, Helgard; Pfaffhuber, Andreas Aspmo; Viezzoli, Andrea (Peer reviewed; Journal article, 2019)Despite the importance of peatlands as carbon reservoirs, a reliable methodology for the detection of peat volumes at regional scale is still missing. In this study we explore for the first time the use of Airborne ...