scholarly journals Modelling the impact of land subsidence on urban pluvial flooding: A case study of downtown Shanghai, China

2016 ◽  
Vol 544 ◽  
pp. 744-753 ◽  
Author(s):  
Jie Yin ◽  
Dapeng Yu ◽  
Rob Wilby
Keyword(s):  
Land Subsidence ◽  
Pluvial Flooding ◽  
Urban Pluvial Flooding ◽  
The Impact

scholarly journals A Depression-Based Index to Represent Topographic Control in Urban Pluvial Flooding

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2115 ◽  
Author(s):  
Huabing Huang ◽  
Xi Chen ◽  
Xianwei Wang ◽  
Xina Wang ◽  
Lin Liu
Keyword(s):  
Limited Attention ◽  
Topographic Wetness Index ◽  
Digital Elevation ◽  
Pluvial Flooding ◽  
Elevation Model ◽  
The Stability ◽  
Urban Pluvial Flooding ◽  
The Impact ◽  
Flooded Areas

Extensive studies have highlighted the roles of rainfall, impervious surfaces, and drainage systems in urban pluvial flooding, whereas topographic control has received limited attention. This study proposes a depression-based index, the Topographic Control Index (TCI), to quantify the function of topography in urban pluvial flooding. The TCI of a depression is derived within its catchment, multiplying the catchment area with the slope, then dividing by the ponding volume of the depression. A case study is demonstrated in Guangzhou, China, using a 0.5 m-resolution Digital Elevation Model (DEM) acquired using Light Detection and Ranging (LiDAR) technology. The results show that the TCI map matches well with flooding records, while the Topographic Wetness Index (TWI) cannot map the frequently flooded areas. The impact of DEM resolution on topographic representation and the stability of TCI values are further investigated. The original 0.5 m-resolution DEM is set as a baseline, and is resampled at resolutions 1, 2, 5, and 10 m. A 1 m resolution has the smallest TCI deviation from those of 0.5 m resolution, and gives the optimal results in terms of striking a balance between computational efficiency and precision of representation. Moreover, the uncertainty in TCI values is likely to increase for small depressions.

scholarly journals Mitigation of Urban Pluvial Flooding: What Drives Residents’ Willingness to Implement Green or Grey Stormwater Infrastructures on Their Property?

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3069
Author(s):  
Francesco Pagliacci ◽  
Edi Defrancesco ◽  
Francesco Bettella ◽  
Vincenzo D’Agostino
Keyword(s):  
Perceived Threat ◽  
Direct Experience ◽  
Case Study Analysis ◽  
Pluvial Flooding ◽  
Prone Area ◽  
Future Events ◽  
Main Factors ◽  
Urban Pluvial Flooding ◽  
The Impact

As a consequence of climate change, the impact of pluvial flooding is expected to increase in the next decades. Despite citizens’ poor knowledge, several types of stormwater infrastructure can be implemented to mitigate the impact of future events. This paper focuses on the implementation of green and grey stormwater interventions (i.e., with or without vegetation) on private properties. Framed by the Protection Motivation Theory, a survey-based case study analysis, carried out in a pluvial flooding-prone area of the Veneto Region (Italy), highlights the main factors driving people’s willingness to implement these interventions. The analysis shows that the implementation of grey stormwater infrastructures is driven by the perceived threat and the amount of past pluvial flooding damage (i.e., the direct experience as a proxy of prior knowledge) while the implementation of green stormwater infrastructures is driven also by additional factors (awareness of these interventions, age and education level of the citizens). Based on these results, lack of knowledge on innovative stormwater interventions represents a critical barrier to their implementation on private properties, and it confirms the need for specific dissemination and information activities.

scholarly journals Potential Impacts of Future Climate Change Scenarios on Ground Subsidence

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 219 ◽  
Author(s):  
Antonio-Juan Collados-Lara ◽  
David Pulido-Velazquez ◽  
Rosa María Mateos ◽  
Pablo Ezquerro
Keyword(s):  
Climate Change ◽  
Land Subsidence ◽  
Ground Subsidence ◽  
Lower Percentage ◽  
Future Climate Change ◽  
Climate Change Scenarios ◽  
Fine Grained ◽  
Fine Grained Material ◽  
The Impact

In this work, we developed a new method to assess the impact of climate change (CC) scenarios on land subsidence related to groundwater level depletion in detrital aquifers. The main goal of this work was to propose a parsimonious approach that could be applied for any case study. We also evaluated the methodology in a case study, the Vega de Granada aquifer (southern Spain). Historical subsidence rates were estimated using remote sensing techniques (differential interferometric synthetic aperture radar, DInSAR). Local CC scenarios were generated by applying a bias correction approach. An equifeasible ensemble of the generated projections from different climatic models was also proposed. A simple water balance approach was applied to assess CC impacts on lumped global drawdowns due to future potential rainfall recharge and pumping. CC impacts were propagated to drawdowns within piezometers by applying the global delta change observed with the lumped assessment. Regression models were employed to estimate the impacts of these drawdowns in terms of land subsidence, as well as to analyze the influence of the fine-grained material in the aquifer. The results showed that a more linear behavior was observed for the cases with lower percentage of fine-grained material. The mean increase of the maximum subsidence rates in the considered wells for the future horizon (2016–2045) and the Representative Concentration Pathway (RCP) scenario 8.5 was 54%. The main advantage of the proposed method is its applicability in cases with limited information. It is also appropriate for the study of wide areas to identify potential hot spots where more exhaustive analyses should be performed. The method will allow sustainable adaptation strategies in vulnerable areas during drought-critical periods to be assessed.

Modeling the influence of urbanization on urban pluvial flooding: a scenario-based case study in Shanghai, China

2017 ◽  
Vol 87 (2) ◽  
pp. 1035-1055 ◽  
Author(s):  
Qingyu Huang ◽  
Jun Wang ◽  
Mengya Li ◽  
Moli Fei ◽  
Jungang Dong
Keyword(s):  
Pluvial Flooding ◽  
Urban Pluvial Flooding

scholarly journals Urban pluvial flooding prediction by machine learning approaches – a case study of Shenzhen city, China

2020 ◽  
Vol 145 ◽  
pp. 103719 ◽  
Author(s):  
Qian Ke ◽  
Xin Tian ◽  
Jeremy Bricker ◽  
Zhan Tian ◽  
Guanghua Guan ◽  
...  
Keyword(s):  
Machine Learning ◽  
Learning Approaches ◽  
Shenzhen City ◽  
Pluvial Flooding ◽  
Urban Pluvial Flooding

Stochastic evaluation of the impact of sewer inlets’ hydraulic capacity on urban pluvial flooding

2016 ◽  
Vol 31 (8) ◽  
pp. 1907-1922 ◽  
Author(s):  
João P. Leitão ◽  
Nuno E. Simões ◽  
Rui Daniel Pina ◽  
Susana Ochoa-Rodriguez ◽  
Christian Onof ◽  
...  
Keyword(s):  
Pluvial Flooding ◽  
Urban Pluvial Flooding ◽  
The Impact

scholarly journals Urban pluvial flooding: a qualitative case study of cause, effect and nonstructural mitigation

2010 ◽  
Vol 3 (2) ◽  
pp. 112-125 ◽  
Author(s):  
I. Douglas ◽  
S. Garvin ◽  
N. Lawson ◽  
J. Richards ◽  
J. Tippett ◽  
...  
Keyword(s):  
Qualitative Case Study ◽  
Pluvial Flooding ◽  
Urban Pluvial Flooding

scholarly journals Comprehensive Understanding the Disaster-Causing Mechanism, Governance Dilemma and Targeted Countermeasures of Urban Pluvial Flooding in China

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1762
Author(s):  
Feng Kong ◽  
Shao Sun ◽  
Yifei Wang
Keyword(s):  
Flood Control ◽  
Policy Formulation ◽  
Urban Flood ◽  
Management Level ◽  
Pluvial Flooding ◽  
Flooding Hazards ◽  
Value Integration ◽  
Urban Pluvial Flooding ◽  
Construction Model ◽  
The Impact

Urban pluvial flooding in China has become one of the major challenges for sustainable development. This paper analyzes the impact of climate change, urbanization, and integrated disaster drivers on urban pluvial flooding hazards, starting from the disaster-causing mechanisms of urban pluvial flooding in China. This paper then analyzes the main features and progress of urban pluvial flooding governance in China. In particular, this paper describes the progress of sponge cities in China. On the basis of the above contents, this paper describes three manifestations of the fragmentation dilemma at the level of governance, namely, fragmentation in value integration due to conflicting management orders and service values, fragmentation in resource and power allocation due to the lack of vertical top-level design and blurred horizontal departmental management boundaries, and fragmentation in policy formulation and implementation due to outdated urban flood control standards and interdepartmental information compartmentalization. In response to the fragmentation dilemma in urban pluvial flooding management in China, this paper introduces the concept of holistic governance and clarifies the path of urban waterlogging management, i.e., forming a collaborative and diversified governance subjects, deeply optimizing the organizational structure of urban waterlogging management, creating a mature information-based governance platform, and improving the legal and rule of law construction model. This paper is informative for understanding the governance of urban pluvial flooding in China from a government-led management level.

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