scholarly journals PHYSICAL AND NUMERICAL MODELING OF TSUNAMI INUNDATION IN COASTAL URBAN AREA

2020 ◽  
pp. 14
Author(s):  
Nobuki Fukui ◽  
Nobuhito Mori ◽  
Che-Wei Chang ◽  
Yu Chida ◽  
Tomohiro Yasuda ◽  
...  
Keyword(s):  
Urban Area ◽  
Laboratory Experiments ◽  
Physical Modelling ◽  
Coastal Communities ◽  
Coastal Hazards ◽  
Hazard Mapping ◽  
Roughness Effects ◽  
Local Conditions ◽  
Tsunami Inundation ◽  
Starting Point

This coastal hazards emphasize the need for engineers to understand the fundamental processes causing damage and the potential of maximum damage in order to design coastal communities with increased resilience to tsunami events. Common methods used to evaluate local conditions caused by tsunamis include post-disaster reconnaissance field surveys, numerical modelling, and laboratory experiments. Behavior of land side tsunami, inundation, is not well known as well as the fluid forcing, fragility characteristics and accuracy of tsunami hazard mapping. This study targets to understand local tsunami behavior in a city scale including complex buildings and improve modelling of tsunami inundation in an urban area. Laboratory experiments are an essential starting point in the investigation of urban roughness effects on wave propagation and maximum pressures in coastal communities. Physical modelling usually uses solitary wave, bore wave, and wave imitating Nankai Trough Earthquake as a tsunami wave.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/-4niVrzXviE

Measuring historical flooding and erosion in Goodnews Bay using datasets commonly available to Alaska communities

Shore & Beach ◽  
2020 ◽  
pp. 3-13
Author(s):  
Richard Buzard ◽  
Christopher Maio ◽  
David Verbyla ◽  
Nicole Kinsman ◽  
Jacquelyn Overbeck
Keyword(s):  
Rural Communities ◽  
Coastal Communities ◽  
Aerial Imagery ◽  
Coastal Hazards ◽  
Surface Model ◽  
Digital Surface Model ◽  
Wave Impact ◽  
Information Gap ◽  
Quantitative Analyses ◽  
Gnss Measurements

Coastal hazards are of increasing concern to many of Alaska’s rural communities, yet quantitative assessments remain absent over much of the coast. To demonstrate how to fill this critical information gap, an erosion and flood analysis was conducted for Goodnews Bay using an assortment of datasets that are commonly available to Alaska coastal communities. Measurements made from orthorectified aerial imagery from 1957 to 2016 show the shoreline eroded 0 to 15.6 m at a rate that posed no immediate risk to current infrastructure. Storm surge flood risk was assessed using a combination of written accounts, photographs of storm impacts, GNSS measurements, hindcast weather models, and a digital surface model. Eight past storms caused minor to major flooding. Wave impact hour calculations showed that the record storm in 2011 doubled the typical annual wave impact hours. Areas at risk of erosion and flooding in Goodnews Bay were identified using publicly available datasets common to Alaska coastal communities; this work demonstrates that the data and tools exist to perform quantitative analyses of coastal hazards across Alaska.

scholarly journals Using Virtual Reality in Sea Level Rise Planning and Community Engagement—An Overview

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1142
Author(s):  
Juliano Calil ◽  
Geraldine Fauville ◽  
Anna Carolina Muller Queiroz ◽  
Kelly L. Leo ◽  
Alyssa G. Newton Mann ◽  
...  
Keyword(s):  
Climate Change ◽  
Virtual Reality ◽  
Sea Level Rise ◽  
Sea Level ◽  
Community Outreach ◽  
Coastal Communities ◽  
Coastal Hazards ◽  
Multidisciplinary Teams ◽  
Simple Task ◽  
Coastal Risks

As coastal communities around the globe contend with the impacts of climate change including coastal hazards such as sea level rise and more frequent coastal storms, educating stakeholders and the general public has become essential in order to adapt to and mitigate these risks. Communicating SLR and other coastal risks is not a simple task. First, SLR is a phenomenon that is abstract as it is physically distant from many people; second, the rise of the sea is a slow and temporally distant process which makes this issue psychologically distant from our everyday life. Virtual reality (VR) simulations may offer a way to overcome some of these challenges, enabling users to learn key principles related to climate change and coastal risks in an immersive, interactive, and safe learning environment. This article first presents the literature on environmental issues communication and engagement; second, it introduces VR technology evolution and expands the discussion on VR application for environmental literacy. We then provide an account of how three coastal communities have used VR experiences developed by multidisciplinary teams—including residents—to support communication and community outreach focused on SLR and discuss their implications.

scholarly journals Resilience from coastal protection

2015 ◽  
Vol 373 (2053) ◽  
pp. 20140383 ◽  
Author(s):  
Lesley C. Ewing
Keyword(s):  
Cultural Values ◽  
San Francisco ◽  
Coastal Communities ◽  
Coastal Hazards ◽  
Community Safety ◽  
Coastal Protection ◽  
Shore Protection ◽  
Coastal Community ◽  
Effective Community ◽  
Key Aspects

Coastal areas are important residential, commercial and industrial areas; but coastal hazards can pose significant threats to these areas. Shoreline/coastal protection elements, both built structures such as breakwaters, seawalls and revetments, as well as natural features such as beaches, reefs and wetlands, are regular features of a coastal community and are important for community safety and development. These protection structures provide a range of resilience to coastal communities. During and after disasters, they help to minimize damages and support recovery; during non-disaster times, the values from shoreline elements shift from the narrow focus on protection. Most coastal communities have limited land and resources and few can dedicate scarce resources solely for protection. Values from shore protection can and should expand to include environmental, economic and social/cultural values. This paper discusses the key aspects of shoreline protection that influence effective community resilience and protection from disasters. This paper also presents ways that the economic, environmental and social/cultural values of shore protection can be evaluated and quantified. It presents the Coastal Community Hazard Protection Resilience (CCHPR) Index for evaluating the resilience capacity to coastal communities from various protection schemes and demonstrates the use of this Index for an urban beach in San Francisco, CA, USA.

scholarly journals A Waterfront View of Coastal Hazards: Contextualizing Relationships among Geographic Exposure, Shoreline Type, and Hazard Concerns among Coastal Residents

2019 ◽  
Vol 11 (23) ◽  
pp. 6687 ◽  
Author(s):  
Steven B. Scyphers ◽  
Michael W. Beck ◽  
Kelsi L. Furman ◽  
Judy Haner ◽  
Lauren I. Josephs ◽  
...  
Keyword(s):  
Climate Change ◽  
Cost Effectiveness ◽  
Coastal Communities ◽  
Coastal Hazards ◽  
Coastal Protection ◽  
Research And Practice ◽  
Living Shorelines ◽  
Ecological Objectives ◽  
Coastal Residents ◽  
Impacts Of Climate Change

Coastal communities exist on the front lines of diverse natural hazards and the growing impacts of climate change. While traditional strategies for dealing with coastal hazards have often involved the hardening or armoring of shorelines, more recent research and practice have demonstrated the value and cost-effectiveness of “living shorelines” and other ecosystem-based strategies for coastal protection. To explore potential relationships among geographic exposure (waterfront vs. inland), shoreline condition (armored vs. natural), and hazard concerns, we surveyed 583 waterfront and inland residents in the northern Gulf of Mexico. We found that overall concern for coastal hazards was similar across waterfront and inland residents, as well as among residents with both armored and natural shorelines. However, concern for specific hazards differed across these groups. Waterfront residents were significantly more concerned about major hurricanes and erosion than inland residents. Conversely, inland residents were more concerned with drought and flooding than waterfront residents. Among waterfront residents, specific hazard concerns were similar between residents with natural and armored shorelines with two key exceptions. Residents with armored shorelines reported higher concern for erosion and sea level rise than residents with natural shorelines. Our results suggest that armored shorelines do not necessarily alleviate concerns about coastal hazards. In the context of balancing social and ecological objectives in addressing coastal hazards or adapting to climate change, understanding the perceptions and behaviors of coastal residents is essential for conserving and protecting coastal ecosystems along residential shorelines.

Community tsunami inundation maps for selected ICG/CARIBE EWS member states

2020 ◽  
Author(s):  
Carlos Sánchez-Linares ◽  
Jorge Macías ◽  
Íñigo Aniel-Quiroga ◽  
Ignacio Aguirre-Ayerbe ◽  
Mauricio González ◽  
...  
Keyword(s):  
Warning System ◽  
General Purpose ◽  
Coastal Hazards ◽  
Indian Ocean Tsunami ◽  
Caribbean Region ◽  
Member States ◽  
Tsunami Inundation ◽  
Inundation Maps ◽  
Tsunami Risk ◽  
The Caribbean

<div>The Intergovernmental Coordination Group for the Tsunami and other Coastal Hazards Warning System for the Caribbean and Adjacent Regions (ICG/CARIBE EWS) was established in 2005 as a subsidiary body of the IOC-UNESCO with the purpose of providing efficient assistance on tsunami risk reduction to Member States in the Caribbean region after the lessons learnt from the 2004 Indian Ocean tsunami.</div><div> </div><div>The aim of the work that we present here, is strengthen the capacities of early warning and response for tsunamis in the Caribbean through the development of community-level tsunami inundation maps for select coastal communities and a technical guide; both to support their preparation for and response to tsunamis. The selected communities under study are in Antigua and Barbuda, Barbados, Dominican Republic, St. Vincent and the Grenadines, and Trinidad and Tobago.</div><div> </div><div>To this end, we use Tsunami-HySEA model, developed by EDANYA Group, which implements in the same code the three phases of an earthquake generated tsunami: generation, propagation and coastal inundation. At the same time it is implemented in nested meshes with different resolution and multi-GPU environment, which allows much faster than real time simulations. Due to this advantage it can produce a 4 h simulation in a 60 arcsec resolution grid for the whole Caribbean Sea in less than 4 min with a single general-purpose GPU.</div><div> </div><div>Once provided the seismic parameters to reproduce the main scenarios that could affect to the nominated communities, and the topobathymetry data available from the study area, an exhaustive process of construction of 4 levels nested meshes was performed for each localization. Secondly, the events are simulated in order to obtain, among others, maximum depth in coast inundation with 5 meters resolution. Finally, all of these data allow us to make a detailed inundation map as a contribution to furthering tsunami risk assessment.</div><div> </div><div>Acknowledgements. This work was done under the auspices of IOC-UNESCO and funded by EU (DG-ECHO)</div>

Testing seismic noise caused by highly concentrated sediment flows in laboratory experiments

2020 ◽  
Author(s):  
Marco Piantini ◽  
Florent Gimbert ◽  
Alain Recking ◽  
Hervé Bellot
Keyword(s):  
Sediment Transport ◽  
Seismic Noise ◽  
Laboratory Experiments ◽  
River Flow ◽  
Mechanistic Model ◽  
Transport Processes ◽  
Sediment Flux ◽  
Extreme Floods ◽  
Starting Point ◽  
Grain Sorting

<p>Sediment transport processes and fluxes play a key role in fluvial geomorphology and hazard triggering. In particular, extreme floods characterized by highly concentrated flows set the pace of mountain landscape evolution, where the linkage between streams and sediment sources leads to strong solid inputs characterized by significant grain sorting processes. The main observation that river processes generate ground vibrations has led to the application of seismic methods for monitoring purposes, which provides an innovative system that overcomes traditional monitoring difficulties especially during floods. Mechanistic models have been proposed in the attempt to invert river flow properties such as sediment fluxes from seismic measurements. Although those models have recently been validated in the laboratory and in the field for low transport rates, it remains unknown whether they are applicable to extreme floods.</p><p>Here we carry a set of laboratory experiments in a steep (18% slope) channel in order to investigate the link between seismic noise and sediment transport under extreme flow conditions with highly concentrated sediment flows. The originality of this set-up is that instead of feeding the flume section directly as usually done, we feed with liquid and solid discharge a low slope storage zone connected to the upstream part of the steep channel. This allows us to produce sediment pulses of varying magnitude (up to the transport capacity) and granulometric composition, traveling downstream as a result of alternate phases of deposition and erosion occurring in the storage area. We measure flow stage, seismic noise, sediment flux and grain size distribution. We find that the previously proposed relationships between seismic power, sediment flux and grain diameter often do not hold in such sediment transport situations. We support that this is due to granular interactions occurring between grains of different sizes within the sediment mixture and leading to complex grain sorting processes. In particular, we observe that bigger grains do not directly impact the bed but rather roll over fines or smaller grains, such that observed seismic power is much lower than expected. These results constitute a starting point for the development of a new mechanistic model for seismic power generated by highly concentrated bedload sediment flows.</p>

Simulation of Tsunami Inundation in Central Peru from Future Megathrust Earthquake Scenarios

2014 ◽  
Vol 9 (6) ◽  
pp. 961-967 ◽  
Author(s):  
Erick Mas ◽  
◽  
Bruno Adriano ◽  
Nelson Pulido ◽  
Cesar Jimenez ◽  
...  
Keyword(s):  
Hazard Mapping ◽  
Slip Model ◽  
Tsunami Height ◽  
Ground Acceleration ◽  
Tsunami Inundation ◽  
Tsunami Simulation ◽  
Earthquake Scenarios ◽  
Spatially Correlated ◽  
Megathrust Earthquakes ◽  
Interseismic Coupling

We estimated, from twelve scenarios of potential megathrust earthquakes, the tsunami impact on the Lima-Callao region in Central Peru. In addition, we conducted hazard mapping using the local envelope of the maximum inundation simulated in these scenarios. The deterministic approach is supported by the decades of geodetic measurements in this area that characterize the interseismic strain build up since historical megathrust earthquakes. The earthquake scenarios for simulation proposed in [1] introduce spatially correlated short-wavelength slip heterogeneities to a first slip model in [2] calculated from the interseismic coupling (ISC) distribution in Central Peru. The ISC was derived from GPS monitoring data as well as from historical earthquake information. The results of strong ground motion simulations in [1] reported that the slip scenario with the deepest average peak values along the strike (Mw= 8.86) generates the largest PGA in the Lima-Callao area. In this study, we found from tsunami simulation results that the slip model with the largest peak slip at a shallow depth (Mw= 8.87) yielded the highest tsunami inundation. Such differences in maximum scenarios for peak ground acceleration and tsunami height reveal the importance of a comprehensive assessment of earthquake and tsunami hazards in order to provide plausible worstcase scenarios for disaster risk management and education.

Open Region: Creating and exploiting opportunities for innovation at the regional scale

2017 ◽  
Vol 25 (2) ◽  
pp. 187-205 ◽  
Author(s):  
Suntje Schmidt ◽  
Felix C Müller ◽  
Oliver Ibert ◽  
Verena Brinks
Keyword(s):  
Regional Development ◽  
Regional Scale ◽  
Local Conditions ◽  
Spatial Perspective ◽  
Starting Point ◽  
Open Region ◽  
Recent Trends ◽  
Policy Measures ◽  
Innovation Processes ◽  
Innovation Policies

The starting point of the article is the observation of an increasing convergence of regional development and innovation policies. These policies are heavily influenced by territorial innovation models that have been extensively revised since they first came about over 30 years ago. Yet, more recent trends towards digitalisation and conceptual advances towards a time-spatial perspective on innovation processes require a more fundamental re-thinking of the nexus of development, innovation policies and territoriality. This paper therefore aims to advance an agenda for reconceptualising region-based innovation policies beyond the assumptions of territoriality implicit in territorial innovations models and related policy schemes. “Open Region” is a heuristic way of thinking about proactive policy measures for redesigning the dialectic interplay between territorial openness and closure. These measures, in essence, aim at creating and exploiting opportunities for innovation within a region by mobilising external expertise and establishing local anchors for innovation. Finally, we address the limitations of applicability and discuss incentives for regional actors to embark on Open Region strategies. The suggested measures can work together, yet it is also possible to utilise them in an eclectic manner or to selectively recombine them in order to address different local conditions.

scholarly journals An evaluation of defluoridation technologies in the context of decision-making strategies

2021 ◽  
Author(s):  
Ann C Fantin
Keyword(s):  
Decision Making ◽  
Drinking Water ◽  
Careful Consideration ◽  
Government Officials ◽  
Local Conditions ◽  
Starting Point ◽  
Specific Community ◽  
The Government ◽  
Selection Of

Fluoride can be considered beneficial or harmful to human health dependant on the amount that is ingested. Many methods exist for the removal of excessive fluoride from drinking water; however, not all defluoridation methods are appropriate for the specific local conditions that may be present within a community. The objective of this research project is to evaluate various available defluoridation technologies against characteristics of a successful and sustainable technology, while considering decision-making strategies that may be employed by those selecting an appropriate defluoridation method to suit the characteristics of the specific community that is affected by fluoride-impacted drinking water. An evaluation of the selected defluoridation technologies supports the notion that there is not an all-encompassing defluoridation technology that would be applicable to all types of situations in which fluoride impacted groundwater is a concern. Water treatment methods for developing countries require careful consideration and selection of a sustainable solution so as to provide long-term benefits and applicability. Formal decision-making strategies would be useful tools at the government level to provide a starting point to determine which available defluoridation methods would be viable at the end user level. Researchers, government officials and, most importantly, local inhabitants of suffering areas must work together to achieve the common goal of clean and safe potable water.

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