Nature Based Solution simulation design methods – A storm surge seagrass application

2021 ◽  
Author(s):  
Umesh Pranavam Ayyappan Pillai ◽  
Nadia Pinardi ◽  
Ivan Federico ◽  
Salvatore Causio ◽  
Jacopo Alessandri ◽  
...  
Keyword(s):  
Storm Surge ◽  
Wave Energy ◽  
Zostera Marina ◽  
Design Methodology ◽  
Storm Surges ◽  
Well Being ◽  
Bottom Friction ◽  
Simulation Design ◽  
Significant Wave ◽  
Coastal Strip

<p>Nature Based solutions (NBS) have been presented in the recent past as a potential solution to natural and climate change adverse effects on human well-being and socio-economic activities.  In this study, we present a simulation design methodology for NBS that can mitigate the effect of storm surges and coastal erosion. The chosen NBS is marine seagrass and it will be applied to the coastal strip of the Emilia-Romagna coasts. Within the framework of the OPEn-air laboRAtories for Nature baseD solUtions to Manage environmental risks (OPERANDUM) project, the seagrass NBS is presented within a simulation design methodology consisting of the comparison between validated wave numerical simulations for the present climate and modified wave simulations with marine seagrass. In this context, the unstructured version of WAVEWATCH III (WW3) model has been implemented for simulating the wave characteristics across the Emilia-Romagna coastal strip with and without seagrass.</p><p>The calibration/validation of WW3 was carried out and sensitivity experiments using the various wind-input dissipation source packages and bottom friction formulations were also attempted to evaluate the model performances (validation results presented here are for the entire 2017 year). The ST6 physics along with SHOWEX bottom friction formulations were chosen ideal for the study area. To evaluate the model results a directional wave rider buoy data was utilized. The model simulated significant wave parameters namely Hs (significant wave height), Tm (mean wave period) were compared with buoy observations and high correlations (0.93) were found with Hs comparison. Further the WW3 model was modified by including the modified bottom dissipation stress due to submerged vegetation, thereby incorporating the NBS as a potential mechanism for wave amplitude reduction. The seagrass species ‘Zostera marina’ was chosen in this study and comparisons showed that seagrass is capable to reduce the wave energy in the study area. Furthermore, the dependence on seagrass plant high-density and low-density scenarios, together with seagrass parameters (height and width of the seagrass) and species show the sensitivity of the results even on reduction of wave energy as obtained with different degrees by all NBS scenarios.    </p><p><strong>Keywords</strong>: Nature-based solutions, WW3, marine seagrass, storm surge, Zostera marina.</p>

scholarly journals Coastal Impacts of Storm Gloria (January 2020) over the Northwestern Mediterranean

2020 ◽  
Author(s):  
Angel Amores ◽  
Marta Marcos ◽  
Diego S. Carrió ◽  
Lluís Gómez-Pujol
Keyword(s):  
Storm Surge ◽  
Wave Height ◽  
Significant Wave Height ◽  
Wind Waves ◽  
Storm Surges ◽  
Western Mediterranean ◽  
Eastern Coast ◽  
Historical Records ◽  
Significant Wave ◽  
Coastal Impacts

Abstract. The ocean component and coastal impacts of Storm Gloria, that hit the Western Mediterranean between January 20th and 23rd 2020 are investigated with a numerical simulation of the storm surges and wind-waves. Storm Gloria caused severe damages and beat several historical records such as significant wave height or 24-h accumulated precipitation. The storm surge developed along the eastern coasts of the Iberian Peninsula reached values up to 1 m, and were accompanied by wind-waves with significant wave height up to 8 m. Along the coasts of the Balearic Islands, the storm footprint was characterised by a negligible storm surge and the impacts were caused by large waves. The comparison to historical records reveals that Storm Gloria is one of the most intense among the events in the region during the last decades and that the waves direction was particularly unusual. Our simulation permits quantifying the role of the different forcings in generating the storm surge. Also, the high spatial grid resolution down to 30 m over the Ebro Delta, allows determining the extent of the flooding caused by the storm surge. We also simulate the overtopping caused by high wind waves that affected a rocky coast of high cliffs (~ 15 m) in the eastern coast of Mallorca Island.

scholarly journals Coastal impacts of Storm Gloria (January 2020) over the north-western Mediterranean

2020 ◽  
Vol 20 (7) ◽  
pp. 1955-1968 ◽  
Author(s):  
Angel Amores ◽  
Marta Marcos ◽  
Diego S. Carrió ◽  
Lluís Gómez-Pujol
Keyword(s):  
Storm Surge ◽  
Wave Height ◽  
Significant Wave Height ◽  
Wind Waves ◽  
Storm Surges ◽  
Western Mediterranean ◽  
Eastern Coast ◽  
Historical Records ◽  
Significant Wave ◽  
Coastal Impacts

Abstract. The ocean component and coastal impacts of Storm Gloria, which hit the western Mediterranean between 20 and 23 January 2020, are investigated with a numerical simulation of the storm surges and wind waves. Storm Gloria caused severe damages and beat several historical records, such as significant wave height or 24 h accumulated precipitation. The storm surge that developed along the eastern coasts of the Iberian Peninsula, reaching values of up to 1 m, was accompanied by wind waves with a significant wave height of up to 8 m. Along the coasts of the Balearic Islands, the storm footprint was characterised by a negligible storm surge and the impacts were caused by large waves. The comparison to historical records reveals that Storm Gloria is one of the most intense among the events in the region during the last decades and that the waves' direction was particularly unusual. Our simulation permits quantification of the role of the different forcings in generating the storm surge. Also, the high spatial grid resolution down to 30 m over the Ebro Delta allows determination of the extent of the flooding caused by the storm surge. We also simulate the overtopping caused by high wind waves that affected a rocky coast of high cliffs (∼15 m) on the eastern coast of Mallorca.

IMPACT ASSESSMENT ON STORM SURGE RISKS TO CONTAINERS CONSIDERING GLOBAL WARMING

2017 ◽  
Author(s):  
Rikito Hisamatsu ◽  
Rikito Hisamatsu ◽  
Kei Horie ◽  
Kei Horie
Keyword(s):  
Risk Assessment ◽  
Global Warming ◽  
Storm Surge ◽  
Storm Surges ◽  
Assessment Tools ◽  
Inundation Depth ◽  
Risk Assessment Tools ◽  
Risk Maps ◽  
The Impact ◽  
Vulnerability Functions

Container yards tend to be located along waterfronts that are exposed to high risk of storm surges. However, risk assessment tools such as vulnerability functions and risk maps for containers have not been sufficiently developed. In addition, damage due to storm surges is expected to increase owing to global warming. This paper aims to assess storm surge impact due to global warming for containers located at three major bays in Japan. First, we developed vulnerability functions for containers against storm surges using an engineering approach. Second, we simulated storm surges at three major bays using the SuWAT model and taking global warming into account. Finally, we developed storm surge risk maps for containers based on current and future situations using the vulnerability function and simulated inundation depth. As a result, we revealed the impact of global warming on storm surge risks for containers quantitatively.

scholarly journals Storm Surges in the Bohai Sea: The Role of Waves and Tides

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1509
Author(s):  
Yuanyi Li ◽  
Huan Feng ◽  
Guillaume Vigouroux ◽  
Dekui Yuan ◽  
Guangyu Zhang ◽  
...  
Keyword(s):  
Storm Surge ◽  
Bohai Sea ◽  
Storm Surges ◽  
Wave Force ◽  
Laizhou Bay ◽  
Bohai Bay ◽  
Coastal Regions ◽  
The Bohai Sea ◽  
Tidal Phase ◽  
Set Up

A storm surge is a complex phenomenon in which waves, tide and current interact. Even though wind is the predominant force driving the surge, waves and tidal phase are also important factors that influence the mass and momentum transport during the surge. Devastating storm surges often occur in the Bohai Sea, a semi-enclosed shallow sea in North China, due to extreme storms. However, the effects of waves on storm surges in the Bohai Sea have not been quantified and the mechanisms responsible for the higher surges that affect part of the Bohai Sea have not been thoroughly studied. In this study, we set up a storm surge model, considering coupled effects of tides and waves on the surges. Validation against measured data shows that the coupled model is capable of simulating storm surges in the Bohai Sea. The simulation results indicate that the longshore currents, which are induced by the large gradient of radiation stress due to wave deformation, are one of the main contributors to the higher surges occurring in some coastal regions. The gently varying bathymetry is another factor contributing to these surges. With such bathymetry, the wave force direction is nearly uniform, and pushes a large amount of water in that direction. Under these conditions, the water accumulates in some parts of the coast, leading to higher surges in nearby coastal regions such as the south coast of the Bohai Bay and the west and south coasts of the Laizhou Bay. Results analysis also shows that the tidal phase at which the surge occurs influences the wave–current interactions, and these interactions are more evident in shallow waters. Neglecting these interactions can lead to inaccurate predictions of the storm surges due to overestimation or underestimation of wave-induced set-up.

scholarly journals Physical Modelling of the Effect on the Wave Field of the WaveCat Wave Energy Converter

2021 ◽  
Vol 9 (3) ◽  
pp. 309
Author(s):  
James Allen ◽  
Gregorio Iglesias ◽  
Deborah Greaves ◽  
Jon Miles
Keyword(s):  
Wave Height ◽  
Wave Energy ◽  
Significant Wave Height ◽  
Wedge Angle ◽  
Wave Energy Converter ◽  
Wave Period ◽  
Surface Elevation ◽  
Energy Converter ◽  
Significant Wave ◽  
Model Scale

The WaveCat is a moored Wave Energy Converter design which uses wave overtopping discharge into a variable v-shaped hull, to generate electricity through low head turbines. Physical model tests of WaveCat WEC were carried out to determine the device reflection, transmission, absorption and capture coefficients based on selected wave conditions. The model scale was 1:30, with hulls of 3 m in length, 0.4 m in height and a freeboard of 0.2 m. Wave gauges monitored the surface elevation at discrete points around the experimental area, and level sensors and flowmeters recorded the amount of water captured and released by the model. Random waves of significant wave height between 0.03 m and 0.12 m and peak wave periods of 0.91 s to 2.37 s at model scale were tested. The wedge angle of the device was set to 60°. A reflection analysis was carried out using a revised three probe method and spectral analysis of the surface elevation to determine the incident, reflected and transmitted energy. The results show that the reflection coefficient is highest (0.79) at low significant wave height and low peak wave period, the transmission coefficient is highest (0.98) at low significant wave height and high peak wave period, and absorption coefficient is highest (0.78) when significant wave height is high and peak wave period is low. The model also shows the highest Capture Width Ratio (0.015) at wavelengths on the order of model length. The results have particular implications for wave energy conversion prediction potential using this design of device.

scholarly journals Credit card cue effect

2019 ◽  
Vol 38 (2) ◽  
pp. 368-383
Author(s):  
King Yin Wong ◽  
Michael Lynn
Keyword(s):  
Credit Card ◽  
Design Methodology ◽  
Credit Cards ◽  
Well Being ◽  
Financial Security ◽  
Consumer Spending ◽  
Content Type ◽  
Moderation Effect ◽  
Show Evidence

Purpose The extant literature has mixed results regarding the credit card cue effect. Some showed that credit card cues stimulate spending, whereas others were unable to replicate the findings or found that cues discourage consumer spending. The purpose of this paper is to investigate how consumers’ sensitivity to the pain of payment affects their mental associations about credit cards and how the differences in credit card associations moderate the credit card cue effect on spending, providing a possible explanation for the mixed results in the literature. Furthermore, this paper examines the role of consumers’ perceived financial well-being, measured by their perceptions of current and future wealth and their sense of financial security, in mediating this moderation effect. Design/methodology/approach An experimental study was conducted with a sample of 337 participants to test the hypothesized model. Findings After being shown credit card cues, spendthrift participants had more spending-related thoughts and less debt-related thoughts, perceived themselves as having better financial well-being and consequently spent more than tightwad participants. Originality/value To the authors’ knowledge, this is the first study to investigate the direct link between an exposure to credit card cues and perceived financial well-being, and one of the few to show evidence of the moderating effect of consumers’ sensitivity to the pain of payment on spending when credit card cues are present. This study suggests that marketers may use credit card cues to promote consumer spending, whereas consumers, especially spendthrifts, should be aware of how credit card cues may inflate their perceived financial well-being and stimulate them to spend more.

scholarly journals Modeling Study on the Asymmetry of Positive and Negative Storm Surges along the Southeastern Coast of China

2021 ◽  
Vol 9 (5) ◽  
pp. 458
Author(s):  
Dongdong Chu ◽  
Haibo Niu ◽  
Wenli Qiao ◽  
Xiaohui Jiao ◽  
Xilin Zhang ◽  
...  
Keyword(s):  
Storm Surge ◽  
Pressure Field ◽  
Three Dimensional ◽  
Storm Surges ◽  
Ocean Model ◽  
Central Pressure ◽  
Linear Interaction ◽  
Southeastern Coast ◽  
Zhoushan Archipelago ◽  
Wind Intensity

In this paper, a three-dimensional storm surge model was developed based on the Finite Volume Community Ocean Model (FVCOM) by the hindcasts of four typhoon-induced storm surges (Chan-hom, Mireille, Herb, and Winnie). After model validation, a series of sensitivity experiments were conducted to explore the effects of key parameters in the wind and pressure field (forward speed, radius of maximum wind (RMW), inflow angle, and central pressure), typhoon path, wind intensity, and topography on the storm surge and surge asymmetry between sea level rise (positive surge) and fall (negative surge) along the southeastern coast of China (SCC). The model results show that lower central pressure and larger RMW could lead to stronger surge asymmetry. A larger inflow angle results in a stronger surge asymmetry. In addition, the path of Chan-hom is the most dangerous path type for the Zhoushan Archipelago area, and that of Winnie follows next. The model results also indicate that the non-linear interaction between wind field and pressure field tends to weaken the peak surge elevation. The effect of topography on storm surges indicates that the peak surge elevation and its occurrence time, as well as the surge asymmetry, increase with a decreasing slope along the SCC.

Ethical consumers' brand avoidance

2014 ◽  
Vol 23 (2) ◽  
pp. 114-120 ◽  
Author(s):  
Anne Rindell ◽  
Tore Strandvik ◽  
Kristoffer Wilén
Keyword(s):  
Design Methodology ◽  
Well Being ◽  
Two Dimensions ◽  
Qualitative Approach ◽  
Specific Group ◽  
Content Type ◽  
Ethical Concerns ◽  
Ethical Consumers ◽  
Consumer Values ◽  
Practical Implications

Purpose – The purpose of this paper is to explore ethical consumers' brand avoidance. The study contributes to brand-avoidance research by exploring what role consumers' ethical concerns play in their brand avoidance. Design/methodology/approach – A qualitative approach is adopted by interviewing 15 active members of organizations that represent ethical concerns for the well-being of animals, the environment and humans. Findings – The study indicates that consumers with a strong value-based perspective on consumption (such as ethical consumers) may reject brands in two different but interrelated ways. In essence, the study reveals characteristics of brand avoidance that have not been discussed in earlier research, in terms of two dimensions: persistency (persistent vs temporary) and explicitness (explicit vs latent). Practical implications – The study shows the importance of considering the phenomenon of brand avoidance, as it may reveal fundamental challenges in the market. These challenges may relate to consumer values that have not been regarded as important or that have been thought of as relating only to a specific group of consumers. Originality/value – The ethical consumers' views represent new insights into understanding brand avoidance.

scholarly journals Design Methodology for a SEAREV Wave Energy Converter

2010 ◽  
Vol 25 (3) ◽  
pp. 760-767 ◽  
Author(s):  
Marie Ruellan ◽  
Hamid BenAhmed ◽  
Bernard Multon ◽  
Christophe Josset ◽  
Aurelien Babarit ◽  
...  
Keyword(s):  
Wave Energy ◽  
Design Methodology ◽  
Wave Energy Converter ◽  
Energy Converter

Measuring tourism success: alternative considerations

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Richard Butler
Keyword(s):  
Design Methodology ◽  
National Level ◽  
Major Change ◽  
Well Being ◽  
Economic Factors ◽  
Content Type ◽  
Alternative Approach ◽  
Indicators Of Success ◽  
Local Levels ◽  
Economic Criteria

PurposeThe study aims to explore the possibility of redefining success in tourism and measuring such a phenomenon by considering alternatives to economic factors, and to identify the ways such measurement could be implemented.Design/methodology/approachThe study reviews and explains current approaches to defining and measuring success in tourism in the literature, followed by identification of alternative factors which could be measured and the implications of such a change in approach.FindingsThere has been a long-standing emphasis and priority placed on measuring tourism at the national level with a focus on economic criteria, and this has been followed at regional and local levels. The result has been that success has become equated with volume, supporting the aim of continued growth in tourism. Such an approach and attitude mitigate against achieving or moving towards sustainability, and other measures are needed to avoid problems such as overtourism.Originality/valueThere has been little discussion of moving to a wider range of indicators of success in tourism, and the previous focus has been on economic criteria and competitiveness as shown by tourist numbers. This paper presents a discussion of an alternative approach, showing that tourism stakeholders from national to local levels need to redefine success as including factors such as community and environmental well-being and focus on a wider concept of success. Using existing data and organisations would enable measuring such concepts to be done without major change or greatly increased costs to agencies.

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