scholarly journals Analysis of Climate Change’s Effect on Flood Risk. Case Study of Reinosa in the Ebro River Basin

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1114
Author(s):  
Eduardo Lastrada ◽  
Guillermo Cobos ◽  
Francisco Javier Torrijo
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Flood Risk ◽  
Climate Models ◽  
Cost Benefit Analysis ◽  
Flood Hazard ◽  
Cost Benefit ◽  
Economic Damage ◽  
Temperature And Precipitation

Floods are one of the natural hazards that could be most affected by climate change, causing great economic damage and casualties in the world. On December 2019 in Reinosa (Cantabria, Spain), took place one of the worst floods in memory. Implementation of DIRECTIVE 2007/60/EC for the assessment and management of flood risks in Spain enabled the detection of this river basin with a potential significant flood risk via a preliminary flood risk assessment, and flood hazard and flood risk maps were developed. The main objective of this paper is to present a methodology to estimate climate change’s effects on flood hazard and flood risk, with Reinosa as the case study. This river basin is affected by the snow phenomenon, even more sensitive to climate change. Using different climate models, regarding a scenario of comparatively high greenhouse gas emissions (RCP8.5), with daily temperature and precipitation data from years 2007–2070, and comparing results in relative terms, flow rate and flood risk variation due to climate change are estimated. In the specific case of Reinosa, the MRI-CGCM3 model shows that climate change will cause a significant increase of potential affected inhabitants and economic damage due to flood risk. This evaluation enables us to define mitigation actions in terms of cost–benefit analysis and prioritize the ones that should be included in flood risk management plans.

scholarly journals Economic analysis of ecosystem based adaptation and engineering options: A case study from Udayapur, Nepal

2015 ◽  
Vol 3 ◽  
pp. 35-42
Author(s):  
Dinesh Chandra Devkota ◽  
Kamal Thapa ◽  
Bhaskar Kharki
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Economic Analysis ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Well Being ◽  
Benefit Analysis ◽  
High Benefit ◽  
Adaptation Options

Ecosystem services are vital to our well-being as they directly or indirectly support our survival and quality of life. But, the growing impact of climate change diminishes the benefit from ecosystem services. Therefore, identifying possible applicable adaptation options are inevitable to reduce the effect of climate change. The present research is based on a case study of Ksedi River watershed, Ajgada Village in Udaypur district of Nepal. The study demonstrates the comparison between different options to deal with flood and make a sound decision, based on economic rationale for long-term benefits. The present study compares ecosystem based adaptation options with engineering options using cost benefit analysis in order to protect village from flooding. Through stakeholder and expert consultations, ecosystem based adaptation options and economic options that are feasible in the village and catchment to mitigate the floods were listed. Economic analysis of these options and the different combinations were done using cost benefit analysis. Analysis was carried out for each of the different combination of options. Focus on ecosystem based adaptation options provide high benefit to cost return in terms of avoided damages and considering engineering options efficient in flood and erosion control in initial stage in spite of its high cost. The study suggests that reforestation in upland forest areas; plantation along riverbed and management of rangeland should be prioritized. Similarly, preparation of flood model, flood height damage curve and flood vulnerable maps specific to the site will help decision makers to implement site specific adaptation options.

Connecting global- and local-scale flood risk assessment: a case study of the Rhine River basin flood hazard

2016 ◽  
Vol 9 (4) ◽  
pp. 343-354 ◽  
Author(s):  
M. Gusyev ◽  
A. Gädeke ◽  
J. Cullmann ◽  
J. Magome ◽  
A. Sugiura ◽  
...  
Keyword(s):  
Risk Assessment ◽  
River Basin ◽  
Flood Risk ◽  
Flood Hazard ◽  
Local Scale ◽  
Rhine River ◽  
Flood Risk Assessment ◽  
Global And Local

scholarly journals Model cascade from meteorological drivers to river flood hazard: flood-cascade v1.0

2020 ◽  
Author(s):  
Peter Uhe ◽  
Daniel Mitchell ◽  
Paul D. Bates ◽  
Nans Addor ◽  
Jeff Neal ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Models ◽  
River Flow ◽  
Flood Hazard ◽  
Data Sets ◽  
Flood Inundation ◽  
River Flooding ◽  
Global Data Sets ◽  
Global Data

Abstract. There is an urgent need for the climate community to translate their meteorological drivers into relevant hazard estimates. This is especially important for the climate attribution and climate projection communities as we seek to understand how anthropogenic climate change has, and will, impact our society. This can be particularly challenging because there are often multiple specialized steps to model the hazard. Current climate change assessments of flood risk typically neglect key processes, and instead of explicitly modeling flood inundation, they commonly use precipitation or river flow as proxies for flood hazard. Here, we lay out a clear methodology for taking meteorological drivers, e.g., from observations or climate models, through to high-resolution (~ 90 m) river flooding (fluvial) hazards. The meteorological inputs (precipitation and air temperature) are transformed through a series of modeling steps to yield, in turn, surface runoff, river flow, and flood inundation. We explore uncertainties at different modeling steps. The flood inundation estimates can then be directly related to impacts felt at community and household levels to determine exposure and risks from flood events. The approach uses global data-sets and thus can be applied anywhere in the world, but we use the Brahmaputra river in Bangladesh as a case study in order to demonstrate the necessary steps in our hazard framework.

Extreme floods value distributions under recent global warming in Northern Italy, and new risk management policies. The project FLORIMAP

2020 ◽  
Author(s):  
Mattia Galizzi ◽  
Renzo Rosso ◽  
Daniele Bocchiola
Keyword(s):  
Climate Change ◽  
Risk Management ◽  
Risk Communication ◽  
Flood Risk ◽  
Flood Hazard ◽  
Northern Italy ◽  
Flood Risk Management ◽  
Recent Climate ◽  
Management Policies

<p>Flood risk in Italy is a wide-spread and never-ending issue. Traditional flood defense focused on making the river system “resistant” to flood events, possibly by flood-control structures including floodwalls, levees, dams and channels. These actions reduce the frequency of inundations, but they do not affect flooding effects, and associated impacts once the flood plain is inundated. In facts, structural flood defenses are designed and operated to accommodate floods not exceeding a given magnitude, as fixed by the original design. Thus, these engineering works are highly inefficient to cope with capacity-exceeding floods, the magnitude of which was fixed many years ago using poor data sets, and it is expected to increase with climate changes.</p><p>FLORIMAP (Smart FLOod RIsk MAnagement Policies), a project funded by Fondazione CARIPLO aims to revalue extreme floods distribution in the different homogeneous areas of northern Italy using regional approaches based upon recent data form the last three decades.</p><p>FLORIMAP will first cover open issues associated with the quantification of flood hazard and inundation risk, then it will assess human exposure and vulnerability, and combine these issues with strategies of communication and risk management, because risk communication is an important activity that can influence the flood risk management. Communication is the bridge between the technical and professional community, decision makers, elected officials, funding sources, and the public at large. The literature on risk communication and perception has highlighted that the understanding of the psychological perception of environmental risk is a crucial factor in order to foster the community resilience and to promote adaptive attitudes and behaviors.</p><p>Here, we present a preliminary assessment of updated extreme values distribution for the case study of Northern Italy hydrologically homogeneous regions. The results will be then compared against those obtained with previous dataset dating until 1970, to study the evolution of flood hazard and inundation risk under recent climate change. We then provide application of flood hazard, and risk for a case study area, and demonstrate modified hazard under recent climate change.</p><p>We then discuss implications for risk communication in the target areas, and provide suggestions for prosecution of the FLORIMAP project. </p>

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