Global evidence of rapid urban growth in flood zones since 1985

Nature, Journal Year: 2023, Volume and Issue: 622(7981), P. 87 - 92

Published: Oct. 4, 2023

Language: Английский

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Spatial characteristics and driving factors of urban flooding in Chinese megacities

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 613, P. 128464 - 128464

Published: Sept. 21, 2022

Language: Английский

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Urban Flood Hazard Assessment and Management Practices in South Asia: A Review

Land, Journal Year: 2023, Volume and Issue: 12(3), P. 627 - 627

Published: March 6, 2023

Urban flooding is a frequent disaster in cities. With the increasing imperviousness caused by rapid urbanization and rising frequency severity of extreme events climate change, hydrological status urban area has changed, resulting floods. This study aims to identify trends gaps highlight potential research prospects field South Asia. Based on an extensive literature review, this paper reviewed flood hazard assessment methods using hydraulic/hydrological models management practices advancement technology high-resolution topographic data, hydrologic/hydraulic such as HEC-RAS/HMS, MIKE, SWMM, etc., are increasingly used for assessment. vary among countries based existing technologies infrastructures. In order control flooding, both conventional physical structures, including drainage embankments, well new innovative techniques, low-impact development, implemented. Non-structural mitigation measures, improved warning systems, have been developed implemented few The major challenge process-based hydraulic was lack DEM short-duration rainfall data region, significantly affecting model’s simulation results implementation measures. Risk-informed must be immediately reduce adverse effects change unplanned flooding. Therefore, it crucial encourage emergency managers local planning authorities consider nature-based solution integrated approach enhances resilience.

Language: Английский

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Enhancing urban flood resilience: A coupling coordinated evaluation and geographical factor analysis under SES-PSR framework

International Journal of Disaster Risk Reduction, Journal Year: 2024, Volume and Issue: 101, P. 104243 - 104243

Published: Jan. 3, 2024

Urban flooding has emerged as a significant urban issue in cities worldwide, with China being particularly affected. To effectively manage and mitigate floods, holistic examination of the interaction between subsystems is required to improve flood resilience. However, interactions mechanisms under disaster haven't been addressed adequately previous studies. Therefore, this paper established conceptual framework for illustrating natural-ecological social-economic subsystem considering pressure, state, response within cycle. The objective investigate coupling coordination degree (CCD) these identify driving factors geographical detector model, Yangtze River Delta are selected an empirical example. findings reveal overall upward trend towards whole area notable variability among cities. resilience state dimension emerges crucial aspect determining CCD area. Key coordinated development identified air pollution, global warming, technological innovation, governance power, financial strength, urbanization. Based on factors, presents potential implications that can serve effective guidance offer insights policymakers, planners, researchers their efforts enhance sustainable future.

Language: Английский

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Urbanizing the floodplain: global changes of imperviousness in flood-prone areas

Environmental Research Letters, Journal Year: 2022, Volume and Issue: 17(10), P. 104024 - 104024

Published: Sept. 13, 2022

Abstract Cities have historically developed close to rivers and coasts, increasing human exposure flooding. That is exacerbated by changes in climate population, urban encroachment on floodplains. Although the mechanisms of how urbanization affects flooding are relatively well understood, there been limited efforts assess magnitude floodplain globally it has changed both space time. Highly resolved global datasets flood hazard area from 1985 2015 now available, enabling reconstruction history at high spatial resolutions. Here we show that urbanized floodplains an average probability 1/100 years, almost doubled since 1985. Further, rate expansion into these increased a factor 1.5 after year 2000. We also find rates were highest most hazardous areas floodplains, with population growth suggesting accompanying increase density. These results reveal scope, trajectory extent encroachment. With tangible implications for risk management, data could be directly used integrated models adaptation pathways

Language: Английский

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Quantifying flood risks during monsoon and post-monsoon seasons: An integrated framework for resource-constrained coastal regions

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 630, P. 130683 - 130683

Published: Jan. 25, 2024

Language: Английский

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A review of nature‐based infrastructures and their effectiveness for urban flood risk mitigation

Wiley Interdisciplinary Reviews Climate Change, Journal Year: 2024, Volume and Issue: 15(5)

Published: May 7, 2024

Abstract Anthropogenic climate change and rapid urbanization are contributing to more frequent intense urban flooding. There is widespread agreement that traditional gray infrastructure, a single‐purpose solution, fails address the problem properly contributes adverse direct indirect environmental impacts. As such, Nature‐based Solutions (NbS) can provide improved outcomes flood risk management along with co‐benefits society economy, as they have numerous benefits incuding often smaller carbon footprint or even sometimes sequestering carbon. However, there ambiguity misconception about NbS uptake of for management, which still inadequate compared infrastructure. This research seeks explore various nature‐based infrastructures including their present status application build resilience flooding through systematic literature review. The robustness some questionable varies across different spatial scales from plot watershed. work stand‐alone in many cases well supplement infrastructure achieve wider benefits. review provides comparison solutions identifies mitigation include elements, an overview effectiveness scales. findings should contribute better understanding appropriate diverse options NbS, gray, hybrid designs by policymakers decision‐makers enable them effectively designing implementing measures. article categorized under: Climate Development > Urbanization, Development, Change Vulnerability Adaptation Learning Cases Analogies

Language: Английский

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Are Pluvial and Fluvial Floods on the Rise?

Water, Journal Year: 2022, Volume and Issue: 14(17), P. 2612 - 2612

Published: Aug. 25, 2022

The aim of this paper is accurately framed in its title: Are pluvial and fluvial (river) floods on the rise? First, physical mechanisms that drive changes hazard were examined. Then, a review literature was undertaken detection an attribution observation records for past to present, as well model-based projections future. Various aspects, factors, processes mechanisms, various indices interest considered. There quite common, even if not scientifically justified, belief that, generally, are rise. However, paper, balanced, knowledge-based assessment undertaken, with discussion interpretation, including caveats indicating considerable departures from such flat-rate statement. Observation show precipitation extremes have been intensifying global scale many regions. A formal analysis shows intensification rainfall events may influenced by greenhouse gas forcing anthropogenic origin. Frequency magnitude rise increasing intense precipitation, while river more complex. High discharges found increase some regions, but decrease other so no general corollaries can be drawn at scale. Heavy projected become, almost ubiquitously, frequent progressing climate change, frequency likely all

Language: Английский

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A hybrid novel framework for flood disaster risk control in developing countries based on smart prediction systems and prioritized scenarios

Journal of Environmental Management, Journal Year: 2022, Volume and Issue: 312, P. 114939 - 114939

Published: March 23, 2022

Language: Английский

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Estimation of flood-exposed population in data-scarce regions combining satellite imagery and high resolution hydrological-hydraulic modelling: A case study in the Licungo basin (Mozambique)

Journal of Hydrology Regional Studies, Journal Year: 2022, Volume and Issue: 44, P. 101247 - 101247

Published: Oct. 25, 2022

Licungo basin (Mozambique) The (23,263 km2) suffers frequent severe flooding due to tropical storms, in a country that is among the world's most vulnerable terms of exposure weather-related hazards and climate change. We propose methodology for estimation population exposed at catchment scale data-scarce regions, combining satellite imagery with integrated high-resolution hydrological-hydraulic modelling. All input data needed are retrieved from freely-available global products. numerical model also freeware. therefore replicable worldwide. An estimate flood extent during Tropical Storm Ana (January 2022) presented as case study. Current products combination models can be used whole catchment. This more realistic than one obtained using alone, since images very rarely taken time maximum flooding. Using proposed methodology, we over 273,000 people (out 1.5 million) were Ana. represents 18% 8 times larger only available images.

Language: Английский

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