scholarly journals Impact of compound flood event on coastal critical infrastructures considering current and future climate

2021 ◽  
Vol 21 (2) ◽  
pp. 587-605
Author(s):  
Mariam Khanam ◽  
Giulia Sofia ◽  
Marika Koukoula ◽  
Rehenuma Lazin ◽  
Efthymios I. Nikolopoulos ◽  
...  
Keyword(s):  
Boundary Condition ◽  
Sea Level Rise ◽  
Sea Level ◽  
Extreme Event ◽  
Anthropogenic Activities ◽  
Future Climate ◽  
Mitigation Strategies ◽  
Flood Hazards ◽  
Distributed Hydrological Model ◽  
Climate Conditions

Abstract. The changing climate and anthropogenic activities raise the likelihood of damage due to compound flood hazards, triggered by the combined occurrence of extreme precipitation and storm surge during high tides and exacerbated by sea-level rise (SLR). Risk estimates associated with these extreme event scenarios are expected to be significantly higher than estimates derived from a standard evaluation of individual hazards. In this study, we present case studies of compound flood hazards affecting critical infrastructure (CI) in coastal Connecticut (USA). We based the analysis on actual and synthetic (considering future climate conditions for atmospheric forcing, sea-level rise, and forecasted hurricane tracks) hurricane events, represented by heavy precipitation and surge combined with tides and SLR conditions. We used the Hydrologic Engineering Center's River Analysis System (HEC-RAS), a two-dimensional hydrodynamic model, to simulate the combined coastal and riverine flooding of selected CI sites. We forced a distributed hydrological model (CREST-SVAS) with weather analysis data from the Weather Research and Forecasting (WRF) model for the synthetic events and from the National Land Data Assimilation System (NLDAS) for the actual events, to derive the upstream boundary condition (flood wave) of HEC-RAS. We extracted coastal tide and surge time series for each event from the National Oceanic and Atmospheric Administration (NOAA) to use as the downstream boundary condition of HEC-RAS. The significant outcome of this study represents the evaluation of changes in flood risk for the CI sites for the various compound scenarios (under current and future climate conditions). This approach offers an estimate of the potential impact of compound hazards relative to the 100-year flood maps produced by the Federal Emergency Management Agency (FEMA), which is vital to developing mitigation strategies. In a broader sense, this study provides a framework for assessing the risk factors of our modern infrastructure located in vulnerable coastal areas throughout the world.

scholarly journals Current and Future Climate Compound-Event Flood Impact on Coastal Critical Infrastructures

2020 ◽  
Author(s):  
Mariam Khanam ◽  
Giulia Sofia ◽  
Marika Koukoula ◽  
Rehenuma Lazin ◽  
Efthymios Nikolopoulos ◽  
...  
Keyword(s):  
Boundary Condition ◽  
Extreme Event ◽  
Anthropogenic Activities ◽  
Wrf Model ◽  
Heavy Precipitation ◽  
Future Climate ◽  
Mitigation Strategies ◽  
Flood Hazards ◽  
Distributed Hydrological Model ◽  
Climate Conditions

Abstract. The changing climate and adverse anthropogenic activities raise the likelihood of damages due to compound flood hazards, triggered by the combined occurrence of extreme precipitation and storm surge during high tides, and exacerbated by sea-level rise (SLR). Risk estimates associated with these extreme event scenarios are expected to be significantly higher than estimates derived from a standard evaluation of individual hazards. In this study, we present case studies of compound flood hazards affecting critical infrastructure (CI) in coastal Connecticut (USA) based on actual and synthetic (that is, under future climate conditions) hurricane events, represented by heavy precipitation and surge combined with high tides and SLR conditions. We used the Hydrologic Engineering Center's River Analysis System (HEC-RAS), a two-dimensional hydrodynamic model to simulate the combined coastal and riverine flooding on selected CI sites. We forced a distributed hydrological model (CREST-SVAS) with weather analysis data from the Weather Research and Forecasting (WRF) model for the synthetic events and from the National Land Data Assimilation System (NLDAS) for the actual events, to derive the upstream boundary condition (flood wave) of HEC-RAS. We extracted coastal tide and surge time series for each event from the National Oceanic and Atmospheric Administration (NOAA) to use as the downstream boundary condition of HEC-RAS. The significant outcome of this study represents the evaluation of changes in flood risk for the CI sites for the various compound scenarios (under current and future climate conditions). This approach offers an estimate of the potential impact of compound hazards relative to the 100-year flood maps produced by the Federal Emergency Management Agency (FEMA), which is vital to developing mitigation strategies. In a broader sense, this study provides a framework for assessing risk factors of our modern infrastructure located in vulnerable coastal areas throughout the world.

scholarly journals The effects of climate change on flood hazards in Kelantan River Basin Malaysia

2021 ◽  
Vol 880 (1) ◽  
pp. 012016
Author(s):  
Tze Huey Tam ◽  
Muhammad Zulkarnain Abd Rahman ◽  
Sobri Harun ◽  
Sophal Try ◽  
Ismaila Usman Kaoje ◽  
...  
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Hydrological Cycle ◽  
Flood Hazard ◽  
Future Climate ◽  
Mitigation Strategies ◽  
Flood Hazards ◽  
Distributed Hydrological Model ◽  
Climate Scenarios ◽  
Kelantan River Basin

Abstract Climate change has had a significant impact on the hydrological cycle, causing changes in precipitation patterns in both frequency and magnitude. The aim of this study is to assess the effect of climate change on flood hazards in Kelantan River Basin, Malaysia. A distributed hydrological model called Rainfall-Runoff-Inundation (RRI) simulates floods under current and future climate scenarios. The Climate Change Factor (CCF) is a tool for forecasting future climate scenarios. The storm used in this analysis had 50-year and 100-year recurrence intervals every 24 hours (ARI). The finding shows that the streamflow in Guillemard station will increase in the future for both the 50- and 100-year ARI. The streamflow increased to 10329 m3/s from 8434.9 m3/s in the current state and to 11220.2 m3/s from 9157.4 m3/s in the 50- and 100-year ARI, respectively. In both cases, the 100-year ARI flood magnitude is significantly less than the 50-year ARI flood extent (current and future). However, the flood depth in several towns located downstream of the Kelantan River Basin is more significant for the 100-year ARI than for the 50-year ARI for both cases. The study’s findings would be helpful to relevant agencies and government departments understand the current and potential flood hazard situation in the study area and assist them in developing effective mitigation strategies for future flood hazards.

scholarly journals TO THE EFFECTIVENESS OF COASTAL AND FLOOD PROTECTION STRUCTURES UNDER TERMS OF CHANGING CLIMATE CONDITIONS

2012 ◽  
Vol 1 (33) ◽  
pp. 60 ◽  
Author(s):  
Peter Froehle
Keyword(s):  
Climate Change ◽  
Sea Level Rise ◽  
Sea Level ◽  
Wind Field ◽  
Future Climate ◽  
Future Climate Change ◽  
Coastal Protection ◽  
Climate Conditions ◽  
Average Wind ◽  
The World

Consequences resulting from future Climate Change may be one of the most severe threats for people and economies in many countries of the world. Besides the problem of sea level rise, also possible general changes in the frequency and intensity of storms as well as general changes in the average wind field are expected for the future. With respect to the coastal protection possible future strategies and also possible future measure are analyzed and assessed with the result that technical, morphological, socio-economic and aesthetical aspects play a role.

scholarly journals Compounding effects of sea level rise and fluvial flooding

2017 ◽  
Vol 114 (37) ◽  
pp. 9785-9790 ◽  
Author(s):  
Hamed R. Moftakhari ◽  
Gianfausto Salvadori ◽  
Amir AghaKouchak ◽  
Brett F. Sanders ◽  
Richard A. Matthew
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Hazard Assessment ◽  
Failure Probability ◽  
River Flow ◽  
Flood Hazard ◽  
High Tide ◽  
Probability Method ◽  
Flood Hazards ◽  
Flood Hazard Assessment

Sea level rise (SLR), a well-documented and urgent aspect of anthropogenic global warming, threatens population and assets located in low-lying coastal regions all around the world. Common flood hazard assessment practices typically account for one driver at a time (e.g., either fluvial flooding only or ocean flooding only), whereas coastal cities vulnerable to SLR are at risk for flooding from multiple drivers (e.g., extreme coastal high tide, storm surge, and river flow). Here, we propose a bivariate flood hazard assessment approach that accounts for compound flooding from river flow and coastal water level, and we show that a univariate approach may not appropriately characterize the flood hazard if there are compounding effects. Using copulas and bivariate dependence analysis, we also quantify the increases in failure probabilities for 2030 and 2050 caused by SLR under representative concentration pathways 4.5 and 8.5. Additionally, the increase in failure probability is shown to be strongly affected by compounding effects. The proposed failure probability method offers an innovative tool for assessing compounding flood hazards in a warming climate.

The Climate Vulnerabilities of Global Nuclear Power

2019 ◽  
Vol 19 (4) ◽  
pp. 3-13 ◽  
Author(s):  
Sarah M. Jordaan ◽  
Afreen Siddiqi ◽  
William Kakenmaster ◽  
Alice C. Hill
Keyword(s):  
Climate Change ◽  
Sea Level Rise ◽  
Sea Level ◽  
Nuclear Power ◽  
Power Plants ◽  
Extreme Event ◽  
International Standards ◽  
Plant Design ◽  
Low Carbon ◽  
And Sea Level

Nuclear power—a source of low-carbon electricity—is exposed to increasing risks from climate change. Intensifying storms, droughts, extreme precipitation, wildfires, higher temperatures, and sea-level rise threaten supply disruptions and facility damage. Approximately 64 percent of installed capacity commenced operation between thirty and forty-eight years ago, before climate change was considered in plant design or construction. Globally, 516 million people reside within a fifty mile (80 km) radius of at least one operating nuclear power plant, and 20 million reside within a ten mile (16 km) radius, and could face health and safety risks resulting from an extreme event induced by climate change. Roughly 41 percent of nuclear power plants operate near seacoasts, making them vulnerable to increasing storm intensity and sea-level rise. Inland plants face exposure to other climate risks, such as increasingly severe wildfires and warmer water temperatures. No entity has responsibility for conducting risk assessments that adequately evaluate the climate vulnerabilities of nuclear power and the subsequent threats to international energy security, the environment, and human health. A comprehensive risk assessment by international agencies and the development of national and international standards is necessary to mitigate risks for new and existing plants.

scholarly journals An extreme event of sea-level rise along the Northeast coast of North America in 2009–2010

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Paul B. Goddard ◽  
Jianjun Yin ◽  
Stephen M. Griffies ◽  
Shaoqing Zhang
Keyword(s):  
North America ◽  
Sea Level Rise ◽  
Sea Level ◽  
Extreme Event ◽  
Northeast Coast

scholarly journals Sea Summation : How Waterfront Urbanisation can use Hydrological Strategies While Facilitating For Climate Change

2021 ◽  
Author(s):  
◽  
Zarah Sahib
Keyword(s):  
Climate Change ◽  
New Zealand ◽  
Sea Level Rise ◽  
Public Space ◽  
Sea Level ◽  
Great Level ◽  
Storm Events ◽  
Climate Conditions ◽  
Global Issues ◽  
Private And Public

<p>Urban inclination has unfavourably allowed for urban development throughout New Zealand to be found either along once naturally ecologically established and natural defensive coastal shorelines, waterfronts or along reclaimed shores to be developed on top of. Through reclamation, it has shown fundamentals of how we want to live closer to the water’s edge, however in this process the lack of social and ecological space is diminishing and being catalyst residential and high end luxury private space (Dianne Menzez). Urban inclination should propose that urban waterfronts become multifunctional and facilitate towards a great public space. However with a deep attachment for the water’s edge, we orientate living ourselves towards the water which also shows an interesting argument between the city and coast relationship that also comes with increasing climate change conditions.   Climate change has been under extensive focus for frequent years, conditions of notably large New Zealand urban sites remain under threat of infringing sea level rise and storm events which are in need for proper systematic infrastructure for this adaption purpose. With significant numbers of infrastructural systems situated in close proximity to waterfront environments, the rising numbers of communities orientated towards this face vulnerability to such global issues. In events of future sea level rise, increasing flooding will definitely impact the prone waterfronts Wellington City is one of New Zealand’s most vulnerable sites to sea level rise due to its proximity to coastal edges. Its low lying surface and unsustainable infrastructure and design promotes flooding through deficient water networks.   This thesis identifies the Wellington’s post-industrial site; Centerport with proposals for intended residential development. There is however a great level of susceptibility the site does not meet needs for protection from arising climate conditions, and its current poor social relation to the wider waterfront, which this thesis intends to investigate and resolve.   Centerport remains vulnerable to being a crucial domain for connectivity to the harbor edge and coastal hazard impact compared to other waterfronts. Through the means of researching adaptive water technological systems, this thesis hopes it will provide and conceptualise an impact within private and public communities through addressing coastal resilience, waterfront resilience and provide permeable adaptive waterfront design for the arising climate conditions.</p>

scholarly journals Impact of Anthropogenic Activities and Sea Level Rise on a Lagoon System: Model and Field Observations

2021 ◽  
Vol 9 (12) ◽  
pp. 1393
Author(s):  
Cuiping Kuang ◽  
Xin Cong ◽  
Zhichao Dong ◽  
Qingping Zou ◽  
Huaming Zhan ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Human Activities ◽  
Construction Projects ◽  
Anthropogenic Activities ◽  
Field Measurements ◽  
Sediment Supply ◽  
Tidal Asymmetry ◽  
Natural Time ◽  
Geomorphological Evolution

The long-term geomorphological evolution of a coastal lagoon is driven by hydrodynamic forcing and is influenced by climate changes and human activities. In this study, a numerical model of the Qilihai lagoon (QL) system was established based on field measurements, previous hydrology data and satellite remote sensing measurements, to simulate the geomorphological evolution of QL from 1900 to 2018. The influences of sea level rise, runoff and human activities on the evolution of geomorphology were investigated. The results of the model show that the construction projects including the tide gate, the bridge, reclamation and the straightening or widening of the tidal channel increased the net deposition within the QL system. Furthermore, the spatial distribution of tidal asymmetry during the natural time period was similar to that of the change in bed thickness. However, bed erosion or deposition was not only dependent on tidal asymmetry but it was also affected by the external sediment supply and the discharge of upstream rivers. Moreover, sea level rise had a significant effect on the tidal asymmetry; therefore, it enhanced the accumulation of sediments in the QL system, while runoff had little effect on the tidal asymmetry or geomorphological changes in the system.

Climate Change Mitigation

2017 ◽  
pp. 64-76 ◽  
Author(s):  
Nishi Srivastava
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Sea Level Rise ◽  
Sea Level ◽  
Climate Change Mitigation ◽  
Mitigation Strategies ◽  
Earth System ◽  
Green House Gases ◽  
Green House ◽  
Change Mitigation

Climate change caused due to our careless activities towards our nature, ecosystem, and whole earth system. We are paying and will be paying in future for our irresponsible activities in past and present. Increased concentration of Green House Gases (GHG) has caused severe global warming which will cause melting of glacier and results in sea level rise. To avoid and reduce the intensity and severity of global warming and climate change, its mitigation is essential. In this chapter we have focused on various issues related with climate change and mitigation strategies.

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