Date: |
09 Feb 2026, 6.00PM – 7.00PM |
duration: |
1 hr |
Venue: |
University of Auckland. Room: 401-401 - 20 Symons ST - Eng1401 Lecture Theatre |
Address: |
20 Symonds Street Auckland |
Cost: |
Free event |
Recently published studies have shown a strong correlation between geomorphological features and liquefaction manifestation on a regional scale. Liquefaction occurrence is dictated by the type of predominant soil material, the general stratigraphic succession and the depth of water table. In addition, it is accepted that the stratigraphy of the soil layers is one of the parameters that influences the production of liquefaction-induced ejecta. However, a quantitative correlation between geomorphology and liquefaction potential at the regional scale has yet to be established. Our research aims to investigate the relationship between the type of surficial geological units and the spatial distribution of liquefaction phenomena by analyzing data from recent seismic events. Specifically, we correlated the density of liquefaction manifestations (ejecta and lateral spreading) with specific geomorphological units usually mapped on meandering river systems. We then statistically analyzed these correlations in terms of liquefaction weight factor (LWF).
This study's results indicate that point bars and abandoned meanders have the highest LWF values, verifying the strong correlation between these geomorphological formations and liquefaction occurrence. In contrast, floodplain units exhibited lower LWF values and consequently lower susceptibility. These findings underscore the importance of detailed geomorphological analysis for improving regional liquefaction susceptibility and hazard assessments.
Dr. George Papathanassiou works as an Associate Professor of engineering geology at the Department of Geology at Aristotle University of Thessaloniki. He has participated in numerous research projects related to geohazards, including liquefaction and landslide hazards, rock slope stability, the development of geohazard-related databases, natural gas pipelines, and soil and rock mechanics.
Towards the quantification of the liquefaction potential of geomorphological features on regional scale Presentation on the relationship between the type of surficial geological units and the spatial distribution of liquefaction phenomena. Dr. George Papathanassiou, Associate Professor of engineering geology at the Department of Geology at Aristotle University of Thessaloniki.
Recently published studies have shown a strong correlation between geomorphological features and liquefaction manifestation on a regional scale. Liquefaction occurrence is dictated by the type of predominant soil material, the general stratigraphic succession and the depth of water table. In addition, it is accepted that the stratigraphy of the soil layers is one of the parameters that influences the production of liquefaction-induced ejecta. However, a quantitative correlation between geomorphology and liquefaction potential at the regional scale has yet to be established. Our research aims to investigate the relationship between the type of surficial geological units and the spatial distribution of liquefaction phenomena by analyzing data from recent seismic events. Specifically, we correlated the density of liquefaction manifestations (ejecta and lateral spreading) with specific geomorphological units usually mapped on meandering river systems. We then statistically analyzed these correlations in terms of liquefaction weight factor (LWF).
This study's results indicate that point bars and abandoned meanders have the highest LWF values, verifying the strong correlation between these geomorphological formations and liquefaction occurrence. In contrast, floodplain units exhibited lower LWF values and consequently lower susceptibility. These findings underscore the importance of detailed geomorphological analysis for improving regional liquefaction susceptibility and hazard assessments.
Dr. George Papathanassiou works as an Associate Professor of engineering geology at the Department of Geology at Aristotle University of Thessaloniki. He has participated in numerous research projects related to geohazards, including liquefaction and landslide hazards, rock slope stability, the development of geohazard-related databases, natural gas pipelines, and soil and rock mechanics.
