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Special Issue "Geohazard Characterization, Modeling, and Risk Assessment"

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A special issue of GeoHazards (ISSN 2624-795X).

Deadline for manuscript submissions: 31 December 2023 | Viewed by 8001

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Special Issue Editors

Prof. Dr. Zhong Lu

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Guest Editor

Roy M. Huffington Department of Earth Sciences, Southern Methodist University, Dallas, TX 75275, USA
Interests: SAR; InSAR; PSInSAR; geophysical modeling; volcanoes; landslides; geohazards
Special Issues, Collections and Topics in MDPI journals

Dr. Tiago Miguel Ferreira

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Guest Editor

Department of Geography and Environmental Management, University of the West of England-UWE Bristol, Frenchay Campus, Bristol BS16 1QY, UK
Interests: multi-hazard risk analysis; risk and vulnerability reduction; seismic vulnerability; seismic rehabilitation and retrofit; urban resilience; disaster response and reconstruction; geographic information systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Feature Issue calls for papers to deal with mapping, analyzing and modeling natural and human-induced hazards, as well as risk assessment and the reduction of geohazards. We welcome review papers, orginal research articles amd technical notes on mapping, monitoring, modeling, and risk and vulnerability assessment and the reduction of various gehazards. In particular, we solicit each of the Editorial Board Members to contribute a manuscript to this special collection.

Prof. Dr. Zhong Lu
Dr. Tiago Miguel Ferreira
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. GeoHazards is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

geohazards
mapping
modeling
risk assessment
vulnerability
societal impacts

Published Papers (4 papers)

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Research

15 pages, 70096 KiB

Open AccessArticle

Influence of the 2020 Seismic Hazard Update on Residential Losses in Greater Montreal, Canada

Philippe Rosset

Xuejiao Long

and

Luc Chouinard

GeoHazards 2023, 4(4), 406-420; https://doi.org/10.3390/geohazards4040023 - 22 Oct 2023

Viewed by 719

Abstract

Greater Montreal is situated in a region with moderate seismic activity and rests on soft ground deposits from the ancient Champlain Sea, as well as more recent alluvial deposits from the Saint Lawrence River. These deposits have the potential to amplify seismic waves, as demonstrated by past strong, and recent weak, earthquakes. Studies based on the 2015 National Seismic Hazard Model (SHM5) had estimated losses to residential buildings at 2% of their value for an event with a return period of 2475 years. In 2020, the seismic hazard model was updated (SHM6), resulting in more severe hazards for eastern Canada. This paper aims to quantify the impact of these changes on losses to residential buildings in Greater Montreal. Our exposure database includes population and buildings at the scale of dissemination areas (500–1000 inhabitants). Buildings are classified by occupancy and construction type and grouped into three building code levels based on year of construction. The value of buildings is obtained from property-valuation rolls and the content value is derived from insurance data. Damage and losses are calculated using Hazus software developed for FEMA. Losses are shown to be 53% higher than the SHM5 estimates. Full article

(This article belongs to the Special Issue Geohazard Characterization, Modeling, and Risk Assessment)

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15 pages, 5848 KiB

Open AccessArticle

Fault Slip Tendency Analysis for a Deep-Sea Basalt CO₂ Injection in the Cascadia Basin

Eneanwan Ekpo Johnson

and

GeoHazards 2023, 4(2), 121-135; https://doi.org/10.3390/geohazards4020008 - 23 Apr 2023

Cited by 1 | Viewed by 1722

Abstract

Offshore basalts, most commonly found as oceanic crust formed at mid-ocean ridges, are estimated to offer an almost unlimited reservoir for CO₂ sequestration and are regarded as one of the most durable locations for carbon sequestration since injected CO₂ will mineralize, forming carbonate rock. As part of the Solid Carbon project, the potential of the Cascadia Basin, about 200 km off the west coast of Vancouver Island, Canada, is investigated as a site for geological CO₂ sequestration. In anticipation of a demonstration proposed to take place, it is essential to assess the tendency of geologic faults in the area to slip in the presence of CO₂ injection, potentially causing seismic events. To understand the viability of the reservoir, a quantitative risk assessment of the proposed site area was conducted. This involved a detailed characterization of the proposed injection site to understand baseline stress and pressure conditions and identify individual faults or fault zones with the potential to slip and thereby generate seismicity. The results indicate that fault slip potential is minimal (less than 1%) for a constant injection of up to ~2.5 MT/yr. This is in part due to the thickness of the basalt aquifer and its permeability. The results provide a reference for assessing the potential earthquake risk from CO₂ injection in similar ocean basalt basins. Full article

(This article belongs to the Special Issue Geohazard Characterization, Modeling, and Risk Assessment)

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17 pages, 11046 KiB

Open AccessArticle

Geothermal Explosion at the 2014 Landslide-Covered Area of the Geyser Valley, Kamchatka, Russian Far East

Masoud Allahbakhshi

Alina V. Shevchenko

Alexander B. Belousov

Marina G. Belousova

Horst Kämpf

and

Thomas R. Walter

GeoHazards 2023, 4(1), 60-76; https://doi.org/10.3390/geohazards4010005 - 10 Mar 2023

Viewed by 1424

Abstract

Geyser geothermal fields are scenic volcanic landforms that often contain tens to hundreds of thermal spot vents that erupt boiling water or contain bubbling mud pools. The fields are potentially hazardous sites due to boiling water temperatures and changes in vent locations and eruption dynamics, which are poorly understood. Here we report on the rapid and profound changes that can affect such a geyser field and ultimately lead to a dangerous, unanticipated eruption. We studied the Geyser Valley, Kamchatka Peninsula, which is a field of geysers and other thermal features and boiling pools. Using high-resolution tri-stereo satellite data and unmanned aerial systems (UAS) with optical and thermal infrared cameras in 2018 and 2019, we were able to identify a newly emerging explosion site. Structure-from-motion analysis of data acquired before and after the explosion reveals morphological and thermal details of the new vent. The explosion site produced an aureole zone of more than 150 m³ of explosively redeposited gravel and clay, a slightly elliptical crater with a diameter of 7.5 m and a crater rim 0.30 m high. However, comparison with archives of photogrammetric data suggests that this site was thermally active years earlier and contained a crater that was obscured and covered by landslides and river sediments. The results allow us to develop a conceptual model and highlight the hazard potential of thermal features buried by landslides and clastic deposits. Sudden explosions may occur at similar sites elsewhere, highlighting the need for careful assessment and monitoring of geomorphological and hydrological changes at geyser sites in other regions. Full article

(This article belongs to the Special Issue Geohazard Characterization, Modeling, and Risk Assessment)

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15 pages, 9319 KiB

Open AccessFeature PaperArticle

The Relevance of Geotechnical-Unit Characterization for Landslide-Susceptibility Mapping with SHALSTAB

Carla Moreira Melo

Masato Kobiyama

Gean Paulo Michel

and

Mariana Madruga de Brito

GeoHazards 2021, 2(4), 383-397; https://doi.org/10.3390/geohazards2040021 - 30 Nov 2021

Cited by 5 | Viewed by 2620

Abstract

Given the increasing occurrence of landslides worldwide, the improvement of predictive models for landslide mapping is needed. Despite the influence of geotechnical parameters on SHALSTAB model outputs, there is a lack of research on models’ performance when considering different variables. In particular, the role of geotechnical units (i.e., areas with common soil and lithology) is understudied. Indeed, the original SHALSTAB model considers that the whole basin has homogeneous soil. This can lead to the under-or-overestimation of landslide hazards. Therefore, in this study, we aimed to investigate the advantages of incorporating geotechnical units as a variable in contrast to the original model. By using locally sampled geotechnical data, 13 slope-instability scenarios were simulated for the Jaguar creek basin, Brazil. This allowed us to verify the sensitivity of the model to different input variables and assumptions. To evaluate the model performance, we used the Success Index, Error Index, ROC curve, and a new performance index: the Detective Performance Index of Unstable Areas. The best model performance was obtained in the scenario with discretized geotechnical units’ values and the largest sample size. Results indicate the importance of properly characterizing the geotechnical units when using SHALSTAB. Hence, future applications should consider this to improve models’ predictivity. Full article

(This article belongs to the Special Issue Geohazard Characterization, Modeling, and Risk Assessment)

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Special Issue "Geohazard Characterization, Modeling, and Risk Assessment"

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