Norwegian Geotechnical Institute (NGI) Digital Archive: Recent submissions
Now showing items 1-20 of 391
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Waste timber pyrolysis in a medium-scale unit: Emission budgets and biochar quality
(Peer reviewed; Journal article, 2020)Pyrolysis of organic waste or woody materials yields a stable carbonaceous product that can be mixed into soil and is often termed “biochar”. During pyrolysis carbon-containing gases are emitted, mainly volatile organic ... -
Evaluation of soil models for improved design of offshore wind turbine foundations in dense sand
(Peer reviewed; Journal article, 2020)In order to perform optimised and safe design of foundations for offshore wind turbines (OWT), it is important to have calculation tools that describe the key features of water-saturated soil subjected to complex and ... -
Leaching and transport of PFAS from aqueous film-forming foam (AFFF) in the unsaturated soil at a firefighting training facility under cold climatic conditions
(Peer reviewed; Journal article, 2019)The contaminant situation at a Norwegian firefighting training facility (FTF) was investigated 15 years after the use of perfluorooctanesulfonic acid (PFOS) based aqueous film forming foams (AFFF) products had ceased. ... -
Effect of Shallow Slip Amplification Uncertainty on Probabilistic Tsunami Hazard Analysis in Subduction Zones: Use of Long-Term Balanced Stochastic Slip Models
(Peer reviewed; Journal article, 2019)The complexity of coseismic slip distributions influences the tsunami hazard posed by local and, to a certain extent, distant tsunami sources. Large slip concentrated in shallow patches was observed in recent tsunamigenic ... -
Effects of Leachates from UV-Weathered Microplastic in Cell-Based Bioassays
(Peer reviewed; Journal article, 2019)Standard ecotoxicological testing of microplastic does not provide insight into the influence that environmental weathering by, e.g., UV light has on related effects. In this study, we leached chemicals from plastic into ... -
Effect of foundation type and modelling on dynamic response and fatigue of offshore wind turbines
(Peer reviewed; Journal article, 2019)This paper presents dynamic response and fatigue analyses of several bottom-mounted offshore wind turbine (OWT) models, simulated in the aero-hydro-servo-elastic simulation tool FAST. The distinction between the models is ... -
Strength and stiffness on lab-mixed specimens of stabilized Norwegian clays
(Peer reviewed; Journal article, 2019)In situ ground improvement by deep mixing the soil with stabilizing agents or binders as lime, cement, cement kiln dust or a combination of these is the most common method applied in the Nordic countries. In Norway, soil ... -
Landslide displacement prediction based on wavelet transform and long short-term memory neural network
(Chapter, 2019)The prediction of landslide displacement is a key component of an early warning system to mitigate landslide risk. Most of the models for landslide displacement prediction are static models. Yet, landslides move dynamically. ... -
Offshore Wind Turbine Foundations State of the Art
(Chapter, 2019)The huge growth and intense development in the European offshore wind power sector over the last decade have created significant achievements within the wind turbine foundation technology. The state of the art focusing on ... -
Acoustic characterization of an artificial CO2 seep using split-beam echo sounders
(Peer reviewed; Journal article, 2019)Geological carbon storage (GCS) has emerged as a promising method for reducing greenhouse gas emissions and achieving international climate goals. Currently, sub-seafloor GCS sites sequester about 1.8 MtCO2/yr. Additional ... -
Geomechanical and Seismic Behaviors of Draupne Shale: A Case Study from the Central North Sea
(Chapter, 2019)Organic-rich shales exhibit a variation in shear strength and anisotropic behavior of seismic wave propagation when the direction of the plane of weakness is varied with respect to the direction of the principal stresses. ... -
Comparison of Sealing Properties of Amundsen and Drake Formations for Potential CO2 Storage in North Sea
(Chapter, 2019)Seal evaluation for CO2 storage is different from that of a hydrocarbon trap since the oil or gas accumulation itself validates the cap-rock integrity. However, in case of subsurface CO2 storage a careful investigation is ... -
The effect of biochar, lime and ash on maize yield in a long-term field trial in a Ultisol in the humid tropics
(Peer reviewed; Journal article, 2020)A multi-season field trial was carried out to investigate the effect of the amendment of biochar, lime, ash and washed biochar on the growth of maize. A degraded, strongly acidic Ultisol (pHKCl 3.60), with a relatively ... -
Undersøkelser av kjemisk utlekking og biota på testfelt på sjøbunnen i Grenlandsfjordene 2018-2019
(NIVA-rapport, Research report, 2019)Denne rapporten beskriver overvåking av spredning og biotilgjengelighet av dioksiner (PCDD/F), heksaklorbenzen (HCB) og oktaklorstyren (OCS) i de ni årene fra etablering av testfelt for tynnsjikt-tildekking i Grenlandsfjordene ... -
Granular viscosity from plastic yield surfaces: The role of the deformation type in granular flows
(Peer reviewed; Journal article, 2020)Numerical simulations of granular flows with Navier–Stokes type models emerged in the last decade, challenging the well established depth-averaged models. The structure of these equations allows for extension to general ... -
Bioaccumulation of Fluorotelomer Sulfonates and Perfluoroalkyl Acids in Marine Organisms Living in Aqueous Film-Forming Foam Impacted Waters
(Peer reviewed; Journal article, 2019)The use of aqueous film-forming foams (AFFFs) has resulted in hot spots polluted with poly- and perfluorinated alkyl substances (PFASs). The phase out of long-chained perfluoroalkyl acids (PFAAs) from AFFFs resulted in the ... -
Bioaccumulation of Fluorotelomer Sulfonates and Perfluoroalkyl Acids in Marine Organisms Living in Aqueous Film-Forming Foam Impacted Waters
(Peer reviewed; Journal article, 2019)The use of aqueous film-forming foams (AFFFs) has resulted in hot spots polluted with poly- and perfluorinated alkyl substances (PFASs). The phase out of long-chained perfluoroalkyl acids (PFAAs) from AFFFs resulted in the ... -
Verification of a framework for cyclic p-y curves in clay by hindcast of Sabine River, SOLCYP and centrifuge laterally loaded pile tests
(Peer reviewed; Journal article, 2020)Pile foundations supporting offshore structures, such as jacket platforms, are subjected to cyclic lateral loading. The capacity and deformation of these pile foundations under cyclic lateral loading are important and ...