scholarly journals Urban Resilience of Shenzhen City under Climate Change

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 537
Author(s):  
Weiwei Shao ◽  
Xin Su ◽  
Jie Lu ◽  
Jiahong Liu ◽  
Zhiyong Yang ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Risk ◽  
Extreme Precipitation ◽  
Chinese Government ◽  
Urban Flood ◽  
Shenzhen City ◽  
Taylor Diagram ◽  
The Future ◽  
The Impact ◽  
Urban Flood Risk

The Chinese government attaches great importance to climate change adaptation and has issued relevant strategies and policies. Overall, China’s action to adapt to climate change remains in its infancy, and relevant research needs to be further deepened. In this paper, we study the future adaptive countermeasures of Shenzhen city in the Pearl River Delta in terms of climate change, especially urban flood risk resilience. Based on the background investigation of urban flood risk in Shenzhen, this paper calculates the annual precipitation frequency of Shenzhen from 1953 to 2020, and uses the extreme precipitation index as a quantitative indicator to analyze the changes in historical precipitation and the impact of major flood disasters in Shenzhen city in previous decades. Based on the six kinds of model data of the scenario Model Inter-comparison Project (MIP) in the sixth phase of the Coupled Model Inter-comparison Project (CMIP6), uses the Taylor diagram and MR comprehensive evaluation method to evaluate the ability of different climate models to simulate extreme precipitation in Shenzhen, and the selected models are aggregated and averaged to predict the climate change trend of Shenzhen from 2020 to 2100. The prediction results show that Shenzhen will face more severe threats from rainstorms and floods in the future. Therefore, this paper proposes a resilience strategy for the city to cope with the threat of flood in the future, including constructing a smart water management system and promoting the development of a sponge city. Moreover, to a certain extent, it is necessary to realize risk transfer by promoting a flood insurance system.

scholarly journals Predicting Future Urban Flood Risk Using Land Change and Hydraulic Modeling in a River Watershed in the Central Province of Vietnam

2021 ◽  
Vol 13 (2) ◽  
pp. 262
Author(s):  
Huu Duy Nguyen ◽  
Dennis Fox ◽  
Dinh Kha Dang ◽  
Le Tuan Pham ◽  
Quan Vu Viet Du ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Cover ◽  
Flood Risk ◽  
Coastal Region ◽  
Flood Plain ◽  
Hydraulic Modeling ◽  
Land Change ◽  
Urban Flood ◽  
The Impact ◽  
Urban Flood Risk

Flood risk is a significant challenge for sustainable spatial planning, particularly concerning climate change and urbanization. Phrasing suitable land planning strategies requires assessing future flood risk and predicting the impact of urban sprawl. This study aims to develop an innovative approach combining land use change and hydraulic models to explore future urban flood risk, aiming to reduce it under different vulnerability and exposure scenarios. SPOT-3 and Sentinel-2 images were processed and classified to create land cover maps for 1995 and 2019, and these were used to predict the 2040 land cover using the Land Change Modeler Module of Terrset. Flood risk was computed by combining hazard, exposure, and vulnerability using hydrodynamic modeling and the Analytic Hierarchy Process method. We have compared flood risk in 1995, 2019, and 2040. Although flood risk increases with urbanization, population density, and the number of hospitals in the flood plain, especially in the coastal region, the area exposed to high and very high risks decreases due to a reduction in poverty rate. This study can provide a theoretical framework supporting climate change related to risk assessment in other metropolitan regions. Methodologically, it underlines the importance of using satellite imagery and the continuity of data in the planning-related decision-making process.

scholarly journals Special Issue on Actions Toward Futuristic Urban Flood Risk Research and Management

2021 ◽  
Vol 16 (3) ◽  
pp. 309-309
Author(s):  
Yoshihiro Shibuo ◽  
Kenji Kawaike ◽  
Hiroaki Furumai
Keyword(s):  
Climate Change ◽  
Risk Management ◽  
Flood Risk ◽  
Flood Risk Management ◽  
Special Issue ◽  
Private Companies ◽  
Urban Flood ◽  
Pluvial Flooding ◽  
The Impact ◽  
Urban Flood Risk

As rainfalls exceeding the designed level have increased, so has damage associated with pluvial flooding. Typhoon Hagibis, which swept Japan in 2019, left 140 municipalities in 15 prefectures scarred from flooding. The sewage networks damaged by the typhoon affected civic life by paralyzing urban functions, raising concerns in urban flood risk and management. Increases in heavy rainfall events associated with global climate change are expected to increase damage from pluvial flooding, thereby necessitating reviews of current urban flood risk management for the purpose of making further improvements against future threats. As we enter an era of frequent urban flooding, it is vitally important that we prepare for urban flood risk management by sharing scientific and technological knowledge among academics, private companies, and administrators. In this context, the current issue is a compilation of contemporary research studies in academia, technological advances in private companies, and practical applications in public administrations in Japan. The works include: the application of urban flood modeling in safe evacuation strategies, the assessment of economic loss, and the impact of climate change; state of the art technologies for urban flood management with the Internet of Things (IoT) and Internet Communication Technology (ICT), Unmanned Aerial Vehicles (UAV), and the next generation of weather radars; and best practices for flood countermeasures, based on knowledge and experience from historical flooding and applied in prefectural governments and local municipalities. We are grateful to all the authors and reviewers who contributed to this special issue, and we hope that it may internationally enhance knowledge-exchange in preparation for growing urban flood risks.

Green infrastructure: The future of urban flood risk management?

2021 ◽  
Author(s):  
Daniel Green ◽  
Emily O'Donnell ◽  
Matthew Johnson ◽  
Louise Slater ◽  
Colin Thorne ◽  
...  
Keyword(s):  
Risk Management ◽  
Green Infrastructure ◽  
Flood Risk ◽  
Flood Risk Management ◽  
Urban Flood ◽  
The Future ◽  
Urban Flood Risk

Assessing Permeability Controls and Flood Risks Related to Urban Impervious Surface Expansion: A Case Study of the Southern Part of Kunming City, China

2021 ◽  
Author(s):  
Tong Xu ◽  
Zhiqiang Xie ◽  
Fei Zhao ◽  
Yimin Li ◽  
Shouquan Yang ◽  
...  
Keyword(s):  
Flood Risk ◽  
Underlying Surface ◽  
Rapid Urbanization ◽  
Urban Flood ◽  
Flood Risks ◽  
Flood Disasters ◽  
Surface Permeability ◽  
Flooding Risk ◽  
The Impact ◽  
Urban Flood Risk

Abstract Because of climate change and rapid urbanization, urban impervious underlying surfaces have expanded, causing Chinese cities to become strongly affected by flood disasters. Therefore, research on urban flood risks has greatly increased in the past decade, with studies focusing on reducing the risk of flood disaster. From 2012 to 2020, the impervious underlying surface has increased, and the permeable underlying surface has decreased annually in Kunming City. This study was conducted to investigate the impact of continuous changes in the urban underlying surface on flood disasters in the Runcheng area south of Kunming City from 2012 to 2020. We constructed a two-dimensional flood model to conduct flood simulations and flood risk analysis for this area. The relationship between the permeability of the underlying surface and urban flood risk was simulated and analyzed by varying the urban underlying surface permeability (30%, 35%, 40%, 45%, 50%, 55%, and 60%). The simulation results indicate that the urban flood risk increased with increases in the impervious underlying surface, with a threshold permeability of 35%. Once the permeability of the urban underlying surface decreased to below 35%, the flood risk increased rapidly. We demonstrated the impact of the urban underlying surface permeability on the risk of urban flood disasters, which is useful for urban planning decisions and urban flooding risk controls.

scholarly journals Urban Flood Risk Reduction by Increasing Green Areas for Adaptation to Climate Change

2016 ◽  
Vol 161 ◽  
pp. 2241-2246 ◽  
Author(s):  
Erik Zimmermann ◽  
Laura Bracalenti ◽  
Rubén Piacentini ◽  
Luis Inostroza
Keyword(s):  
Climate Change ◽  
Risk Reduction ◽  
Flood Risk ◽  
Adaptation To Climate Change ◽  
Urban Flood ◽  
Green Areas ◽  
Flood Risk Reduction ◽  
Urban Flood Risk

scholarly journals Climate change-induced impacts on urban flood risk influenced by concurrent hazards

2012 ◽  
Vol 5 (3) ◽  
pp. 203-214 ◽  
Author(s):  
A.N. Pedersen ◽  
P.S. Mikkelsen ◽  
K. Arnbjerg-Nielsen
Keyword(s):  
Climate Change ◽  
Flood Risk ◽  
Urban Flood ◽  
Urban Flood Risk

scholarly journals Drivers of future urban flood risk

2020 ◽  
Vol 378 (2168) ◽  
pp. 20190216 ◽  
Author(s):  
Emily C. O'Donnell ◽  
Colin R. Thorne
Keyword(s):  
Climate Change ◽  
Flood Risk ◽  
Capital Investment ◽  
First Century ◽  
Urban Spaces ◽  
Urban Flood ◽  
Global Challenge ◽  
Science Technology ◽  
Economic Worth ◽  
Urban Flood Risk

Managing urban flood risk is a key global challenge of the twenty-first century. Drivers of future UK flood risk were identified and assessed by the Flood Foresight project in 2002–2004 and 2008; envisaging flood risk during the 2050s and 2080s under a range of scenarios for climate change and socio-economic development. This paper qualitatively reassesses and updates these drivers, using empirical evidence and advances in flood risk science, technology and practice gained since 2008. Of the original drivers, five have strengthened, three have weakened and 14 remain within their 2008 uncertainty bands. Rainfall, as impacted by climate change, is the leading source driver of future urban flood risk. Intra-urban asset deterioration, leading to increases in a range of consequential flood risks, is the primary pathway driver. Social impacts (risk to life and health, and the intangible impacts of flooding on communities) and continued capital investment in buildings and contents (leading to greater losses when newer buildings of higher economic worth are inundated) have strengthened as receptor drivers of urban flood risk. Further, we propose two new drivers: loss of floodable urban spaces and indirect economic impacts, which we suggest may have significant impacts on future urban flood risk. This article is part of the theme issue ‘Urban flood resilience’.

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