Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Urban Flood Risk Zonation Using GeoSM-NatE Tool: A Case Study of Kochi City, India
https://orcid.org/http://orcid.org/0009-0006-3273-940X
https://orcid.org/http://orcid.org/0000-0001-6789-8597
https://orcid.org/http://orcid.org/0000-0002-1286-7934
https://orcid.org/http://orcid.org/0000-0002-1625-5206
The chapter focuses on the growing issue of urban flooding, worsened by the combined impact of rapid urbanization and climate change. Kochi Municipal Corporation of Ernakulam district of Kerala, which has witnessed a significant expansion in urban land area and witnessed extreme rainfall in the recent past, has been selected for the study. The state's percentage of urban dwellers increased in the 2011 census due to the reclassification of rural areas to census towns. The expansion in urban land brought in unplanned urban growth in the state. Notably, the study area experienced record-breaking rainfall in 2021, with precipitation reaching 3610.2 mm, surpassing the normal annual average of 2924.7 mm by 23.4%. Such extreme rainfall events require comprehensive research and adaptive measures in urban planning and flood risk management to address the escalating challenges posed by urbanization and changing climatic patterns. The study considered the following factors that significantly affect urban flood: rainfall intensity, vegetation and water cover, slope, soil type, land cover, built infrastructure, natural drainage, and population density. The Geo-Spatial Mapping for Natural Ecosystem (GeoSM-NatE) tool based on GIS application is utilized here to delineate layers of urban features. The goal is to identify the wards within the selected study area that are most susceptible to urban flood risk for effectively pinpointing the hotspots. From the parameters analysed, a consistent trend emerges wherein wards exhibiting low Vegetation Index (NDVI) and Water Index (NDWI) values, combined with less slope, high building index (NDBI), and high population density serve as prominent indicators of potential risk. Also, the wards located in close proximity to water bodies are classified within the ‘very high risk’ category for urban flooding across multiple parameters. The study provides valuable inputs to urban planners and other stakeholders for the development of effective flood risk management strategies in the face of rapid urbanization and climate change impacts.
Urban Flood Risk Zonation Using GeoSM-NatE Tool: A Case Study of Kochi City, India
https://orcid.org/http://orcid.org/0009-0006-3273-940X
https://orcid.org/http://orcid.org/0000-0001-6789-8597
https://orcid.org/http://orcid.org/0000-0002-1286-7934
https://orcid.org/http://orcid.org/0000-0002-1625-5206
The chapter focuses on the growing issue of urban flooding, worsened by the combined impact of rapid urbanization and climate change. Kochi Municipal Corporation of Ernakulam district of Kerala, which has witnessed a significant expansion in urban land area and witnessed extreme rainfall in the recent past, has been selected for the study. The state's percentage of urban dwellers increased in the 2011 census due to the reclassification of rural areas to census towns. The expansion in urban land brought in unplanned urban growth in the state. Notably, the study area experienced record-breaking rainfall in 2021, with precipitation reaching 3610.2 mm, surpassing the normal annual average of 2924.7 mm by 23.4%. Such extreme rainfall events require comprehensive research and adaptive measures in urban planning and flood risk management to address the escalating challenges posed by urbanization and changing climatic patterns. The study considered the following factors that significantly affect urban flood: rainfall intensity, vegetation and water cover, slope, soil type, land cover, built infrastructure, natural drainage, and population density. The Geo-Spatial Mapping for Natural Ecosystem (GeoSM-NatE) tool based on GIS application is utilized here to delineate layers of urban features. The goal is to identify the wards within the selected study area that are most susceptible to urban flood risk for effectively pinpointing the hotspots. From the parameters analysed, a consistent trend emerges wherein wards exhibiting low Vegetation Index (NDVI) and Water Index (NDWI) values, combined with less slope, high building index (NDBI), and high population density serve as prominent indicators of potential risk. Also, the wards located in close proximity to water bodies are classified within the ‘very high risk’ category for urban flooding across multiple parameters. The study provides valuable inputs to urban planners and other stakeholders for the development of effective flood risk management strategies in the face of rapid urbanization and climate change impacts.
Urban Flood Risk Zonation Using GeoSM-NatE Tool: A Case Study of Kochi City, India
https://orcid.org/http://orcid.org/0009-0006-3273-940X
https://orcid.org/http://orcid.org/0000-0001-6789-8597
https://orcid.org/http://orcid.org/0000-0002-1286-7934
https://orcid.org/http://orcid.org/0000-0002-1625-5206
The chapter focuses on the growing issue of urban flooding, worsened by the combined impact of rapid urbanization and climate change. Kochi Municipal Corporation of Ernakulam district of Kerala, which has witnessed a significant expansion in urban land area and witnessed extreme rainfall in the recent past, has been selected for the study. The state's percentage of urban dwellers increased in the 2011 census due to the reclassification of rural areas to census towns. The expansion in urban land brought in unplanned urban growth in the state. Notably, the study area experienced record-breaking rainfall in 2021, with precipitation reaching 3610.2 mm, surpassing the normal annual average of 2924.7 mm by 23.4%. Such extreme rainfall events require comprehensive research and adaptive measures in urban planning and flood risk management to address the escalating challenges posed by urbanization and changing climatic patterns. The study considered the following factors that significantly affect urban flood: rainfall intensity, vegetation and water cover, slope, soil type, land cover, built infrastructure, natural drainage, and population density. The Geo-Spatial Mapping for Natural Ecosystem (GeoSM-NatE) tool based on GIS application is utilized here to delineate layers of urban features. The goal is to identify the wards within the selected study area that are most susceptible to urban flood risk for effectively pinpointing the hotspots. From the parameters analysed, a consistent trend emerges wherein wards exhibiting low Vegetation Index (NDVI) and Water Index (NDWI) values, combined with less slope, high building index (NDBI), and high population density serve as prominent indicators of potential risk. Also, the wards located in close proximity to water bodies are classified within the ‘very high risk’ category for urban flooding across multiple parameters. The study provides valuable inputs to urban planners and other stakeholders for the development of effective flood risk management strategies in the face of rapid urbanization and climate change impacts.
Urban Flood Risk Zonation Using GeoSM-NatE Tool: A Case Study of Kochi City, India
Advances in 21st Century Human Settlements
Firoz C, Mohammed (Herausgeber:in) / Dahiya, Bharat (Herausgeber:in) / Rajendran, Lakshmi Priya (Herausgeber:in) / Dashora, Lalit Kumar (Herausgeber:in) / Chatterjee, Uday (Herausgeber:in) / Abdul Salam, Hudha (Autor:in) / Mukherjee, Mahua (Autor:in) / Yadav, Brijesh Kumar (Autor:in) / Kumar, Atul (Autor:in)
01.02.2025
19 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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