scholarly journals Experimental Flash Floods Assessment Through Urban Flood Risk Mitigation (UFRM) Model: The Case Study of Ligurian Coastal Cities

2021 ◽  
Vol 3 ◽  
Author(s):  
Carlotta Quagliolo ◽  
Elena Comino ◽  
Alessandro Pezzoli
Keyword(s):  
Flood Risk ◽  
Natural Capital ◽  
Risk Mitigation ◽  
Spatial Knowledge ◽  
Mitigation Strategies ◽  
Extreme Weather Events ◽  
Urban Flood ◽  
Coastal Cities ◽  
Runoff Reduction ◽  
Urban Flood Risk

Cities are vulnerable to extreme weather events, particularly by considering flash flood risk as a result of even more short-duration intensive rainfall. In the context of climate change, compound flooding due to simultaneous storm surges and increased runoff may further exacerbate the risk in coastal cities, and it is expected to be frequent and severe across several European urban areas. Despite this increasing evidence, the spatial knowledge of the hazardous events/vulnerabilities through modelling scenarios at the urban level is quite unexplored. Moreover, flood-prone areas often do not correspond to the traditional flood risk classification based on predicted return-period. The result that huge impacts (human losses and damages) occur everywhere throughout the city. Consequently, this new challenge requires stormwater flooding mitigation strategies to adapt to cities while mainstreaming urban flood resilience. In this paper, we considered the Urban Flood Risk Mitigation model through the employment of the open-source tool—Integrated Evaluation of Ecosystem Services and Trade-off (InVEST)—developed by the Natural Capital Project, integrated into a GIS environment. The model application in the three urban coastal territory of the Liguria Region (Italy) estimated the amount of runoff due to two extreme rainfall events for each watershed considered. These index calculation results help define examples of Natural Water Retention Measures (NWRM) per land-use type as resilient solutions by addressing site-specific runoff reduction. Local sensitivity analysis was finally conducted to comprehend the input parameter's influence of rain variation on the model.

Future directions in Blue-Green Infrastructure research

2021 ◽  
Author(s):  
Emily O’Donnell
Keyword(s):  
Water Quality ◽  
Green Infrastructure ◽  
Flood Risk ◽  
Social Practice ◽  
Green Space ◽  
Natural Capital ◽  
Urban Flood ◽  
Community Preferences ◽  
Urban Flood Risk

<p>As global cities rethink their approaches to urban flood risk and water management in response to climate change, accelerating urbanisation and reductions in public green space, Blue-Green Infrastructure (BGI) is gaining increasing recognition due to the advantages of multifunctional BGI solutions over traditional piped drainage and grey infrastructure. BGI, including green and blue roofs, swales, rain gardens, street trees, ponds, urban wetlands, restored watercourses, reconnected floodplains, and re-naturalised rivers, is designed to turn ‘blue’ (or ‘bluer’) during rainfall events in order to reduce urban flood risk. In addition to managing flood risk and increasing water security, BGI generates a range of socio-cultural, economic and environmental co-benefits that help city authorities tackle other urban challenges and ultimately improve the quality of life of city dwellers.</p><p>Extensive research over the last decade has focused on improving knowledge of BGI systems in several broad areas, including: hydrological and hydraulic modelling of water flow through BGI assets; biochemical assessments of sediment and water quality; public preferences; identification and evaluation of BGI co-benefits, and; BGI planning and governance. Emerging research into adaptation pathways, natural capital accounting and social practice approaches for understanding community preferences demonstrate how BGI research is moving beyond hydrodynamic modelling to explore decision making under future uncertainty and placing greater emphasis on the role of community preferences in designing BGI that is accepted and supported by those who directly benefit.</p><p>This presentation will explore these emerging research areas, particularly focusing on the need for interdisciplinary research into BGI to enable the challenges and opportunities to be fully appreciated. Current knowledge gaps that present research opportunities in BGI will also be discussed, including the need for rigorous assessment criteria to determine the success of multifunctional BGI systems; greater investigation of the social benefits of BGI and the value people place on different types of BGI; the role of implicit perceptions in designing BGI assets, and; the role of urban watercourses as multifunctional BGI corridors able to safely convey stormwater while boosting water quality, providing multiple urban pathways (active transport, wildlife movements, etc.) and increasing green space in cities.</p>

Integrated Methodology for Urban Flood Risk Mitigation in Cittanova, Italy

2018 ◽  
Vol 144 (10) ◽  
pp. 05018013 ◽  
Author(s):  
Fabio Scionti ◽  
Marcelo Gomes Miguez ◽  
Giuseppe Barbaro ◽  
Matheus Martins De Sousa ◽  
Giandomenico Foti ◽  
...  
Keyword(s):  
Flood Risk ◽  
Risk Mitigation ◽  
Urban Flood ◽  
Integrated Methodology ◽  
Urban Flood Risk

scholarly journals Ruling Big Data Use in Urban Flood Risk Mitigation

2015 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Antje Witting ◽  
Deborah Kallee
Keyword(s):  
Big Data ◽  
Flood Risk ◽  
Risk Mitigation ◽  
Data Use ◽  
Urban Flood ◽  
Urban Flood Risk

scholarly journals A Framework for Risk-Based Assessment of Urban Floods in Coastal Cities

2021 ◽  
Author(s):  
M. Dinesh Kumar ◽  
Shubham Tandon ◽  
Nitin Bassi ◽  
Pradipta Kumar Mohanty ◽  
Saurabh Kumar ◽  
...  
Keyword(s):  
High Risk ◽  
Flood Risk ◽  
Risk Index ◽  
Progressive Increase ◽  
Urban Floods ◽  
Urban Flood ◽  
Coastal Cities ◽  
Index Value ◽  
The City ◽  
Urban Flood Risk

Abstract Many coastal cities in developing countries are at the risk of flooding due to a progressive increase in the built-up areas and poor management of stormwater. The flooding situation in coastal cities gets accentuated further due to climate induced natural disasters such as cyclones and climate change induced sea-level rise that adversely impact the city’s natural drainage potential. This study developed a composite urban flood risk index consisting of three sub-indices and 20 key natural, physical, social, and economic influencing variables for a coastal city (i.e. Cuttack) in eastern India, the intensity of storm runoff being one among the many. The intensity-duration-frequency curve developed shows that the city can experience floods with a peak discharge of 1,320 cubic metre per second every alternate year for a rainfall intensity of 2-hour duration. The urban flood risk index computed for all the city wards shows that out of the 59 wards, only one ward has low flood risk (index value < 0.40) and 20 wards are at high risk (index value 0.55 and above) from the urban flood. Thereafter, factors leading to high risk due to urban floods were identified and the institutional capacities available with the urban utility for fighting floods analyzed.

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