Comparison of urbanization and climate change impacts on urban flood volumes: Importance of urban planning and drainage adaptation

Zhou, Qianqian; Leng, Guoyong; Su, Jiongheng; Ren, Yi

doi:10.1016/j.scitotenv.2018.12.184

Cited by 277 publications

(117 citation statements)

References 59 publications

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“…The third problem concerns the adaptability of the fixed drainage systems to various future conditions mainly driven by urban growth [6-9] and climate change [10][11][12][13].As one of the major driving forces, urbanization tends to worsen the performance of drainage systems as the urban form changes. Typical characteristics of urban form change include the increases of both the constructed area and its impervious fraction, which lead to a larger volume of urban flooding [14,15] and higher urban water pollutant loads such as TSS (total suspended solids) and NH 4 -N [16]. In addition to the impervious fraction, other relevant characteristics, such as allotment geometry and roof area can be conceptualized by a newly developed software that performs refined simulation and management of urban water systems [17].…”

mentioning

confidence: 99%

Effects of Urban Forms on Separate Drainage Systems: A Virtual City Perspective

Jia

Sitzenfrei

Rauch

et al. 2019

Water

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The development of urban drainage systems is challenged by rapid urbanization; however, little attention is paid to the urban form and its effects on these systems. This study develops an integrated city-drainage model that configures typical urban forms and their associated drainage infrastructures, specifically domestic wastewater and rainwater systems, to analyze the relationship between them. Three typical types of urban forms were investigated: the square, the star, and the strip. Virtual cities were designed first, with the corresponding drainage systems generated automatically and then linked to a model herein called the Storm Water Management Model (SWMM). Evaluation was based on 200 random configurations of wastewater/rainwater systems with different structures or attributes. The results show that urban forms play more important roles on three dimensions of performance, namely economic efficiency, effectiveness, and adaptability, of the rainwater systems than of the wastewater systems. Cost is positively correlated to the effectiveness of rainwater systems among the different urban forms, while adaptability is negatively correlated to the other two performance dimensions. Regardless of the form, it is difficult for a city to make its drainage systems simultaneously cost-effective, efficient, and adaptable based on the virtual cities we investigated. This study could inspire the urban planning of both built-up and to-be-built areas to become more sustainable with their drainage infrastructure by recognizing the pros and cons of different macroscale urban forms.

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confidence: 99%

Effects of Urban Forms on Separate Drainage Systems: A Virtual City Perspective

Jia

Sitzenfrei

Rauch

et al. 2019

Water

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“…The probabilistic approach and the improvement of research techniques in the field can help to minimize these errors. For example, risk maps, combined with a quantification of the urban drainage system (especially in the case of urban floods) can represent a fundamental tool for floods mitigation and for future adaptation strategies [66]. An important aspect that is beginning to take importance in the forecast of flood phenomena is the identification of nonstationary flooding series and the analysis of their causes [67].…”

Section: Discussionmentioning

confidence: 99%

Linking Flood Susceptibility Mapping and Governance in Mexico for Flood Mitigation: A Participatory Approach Model

Bonasia

Lucatello

2019

Atmosphere

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In many countries of the world, floods continue to cause extensive damage to people and properties. This is also the case of Mexico, where meteorological phenomena cause flooding every year. In order to mitigate continuous losses and damages, crucial tools like hazard maps are essential for prevention. This review article analyzes the main reasons for the shortcomings on disasters caused by floods in Mexico. We argue that strong linking between the realm of technical hazard mappings and local governance as an integrated approach to manage disasters can be a basis for a new prevention policy in Mexico. This consideration is achieved through the description of the available information on the meteorological events that have caused major damage in recent years and the analysis of the interventions carried out at decision-making level by the government and the national civil protection system. The application that hazard maps have in the world and their usefulness is also discussed. From the analysis carried out it emerges that the inefficiency of the system in preventing damage caused by floods in Mexico is due to both the lack of high-level expertise in hazard maps design and the lack of their use in decision-making policies at the local level.

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“…The importance of urban sprawl and changes in rainfall, evaluating the worst possible consequences of flooding of an urban cities, was demonstrated in [15], showing that on an average of 1.7 times per year, a greater number of buildings are exposed to flood hazard under the worst-case combined scenario as compared with the baseline scenario. A study by [16] focused on comparing the impacts of urbanization and climate change on urban runoff and flood volumes, taking into account the role of urban drainage. The research outcomes featured the significance of reassessing the performance of present and future drainage networks in adapting to the climate changing and urban improvement.Flood hazard and urban growth have been discussed in many studies that focused on investigating the impact of urban growth-driven land use change on the extreme rainfall variability in and around cities, by means of sensitivity studies [17].…”

mentioning

confidence: 99%

“…The social and economic impacts of climate change on the urban environment were investigated by [19] and the results included recommendations and solutions that the government should implement to manage the urban extension [20]. Many other studies have indicated that a flood risk study should be included as part of the urban planning process [16,21], and have also stated that urbanized floodplains are human-natural systems, where climate, socioeconomic trends, built systems, and riverine processes affect flood hazards and consequent disasters.The extensive land-use modifications accompanying urban growth have led to an increase in changes in the surface runoff [22]. As stated in the Collaborative Research on Flood Resilience in Urban Areas (CORFU) project, urban expansion plays a focal role in the evaluation of flood risk [23].…”

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confidence: 99%

mentioning

confidence: 99%

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Impacts of Triple Factors on Flash Flood Vulnerability in Egypt: Urban Growth, Extreme Climate, and Mismanagement

et al. 2020

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Urban growth, extreme climate, and mismanagement are crucial controlling factors that affect flood vulnerability at wadi catchments. Therefore, this study attempts to understand the impacts of these three factors on the flash flood vulnerability in different climatic regions in Egypt. An integrated approach is presented to evaluate the urban growth from 1984 to 2019 by using Google Images and SENTINEL-2 data, and to develop hazard maps by using a rainfall-runoff-inundation model (RRI). Annual rainfall trend analysis was performed to evaluate the temporal variability trend. The hazard maps that were created were classified into three categories (low, medium, and high) and integrated with the urban growth maps to evaluate the impacts on the flood-vulnerable areas. The results show a significant increase in urban growth resulting in an increase of prone areas for flood hazards over time. However, the degree of this hazard is mainly related to growth directions. Mismanagement affects urban growth directions in both planned and unplanned growth, whether by loss of control over unplanned growth or by deficiencies in approved plans. The rainfall analysis showed that there is no explicit relationship to increases or decreases in the flood vulnerable areas. An urban planning approach is recommended for risk reduction management based on a comprehensive study considering such factors.

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Comparison of urbanization and climate change impacts on urban flood volumes: Importance of urban planning and drainage adaptation

Cited by 277 publications

References 59 publications

Effects of Urban Forms on Separate Drainage Systems: A Virtual City Perspective

Effects of Urban Forms on Separate Drainage Systems: A Virtual City Perspective

Linking Flood Susceptibility Mapping and Governance in Mexico for Flood Mitigation: A Participatory Approach Model

Impacts of Triple Factors on Flash Flood Vulnerability in Egypt: Urban Growth, Extreme Climate, and Mismanagement

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