A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka
Critical information on a flood-affected area is needed in a short time frame to initiate rapid response operations and develop long-term flood management strategies. This study combined rainfall trend analysis using Asian Precipitation—Highly Resolved Observational Data Integration towards Evaluati...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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MDPI
2018
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| Acceso en línea: | https://hdl.handle.net/10568/92443 |
| _version_ | 1855525056437813248 |
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| author | Alahacoon, Niranga Matheswaran, Karthikeyan Pani, Peejush Amarnath, Giriraj |
| author_browse | Alahacoon, Niranga Amarnath, Giriraj Matheswaran, Karthikeyan Pani, Peejush |
| author_facet | Alahacoon, Niranga Matheswaran, Karthikeyan Pani, Peejush Amarnath, Giriraj |
| author_sort | Alahacoon, Niranga |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Critical information on a flood-affected area is needed in a short time frame to initiate rapid response operations and develop long-term flood management strategies. This study combined rainfall trend analysis using Asian Precipitation—Highly Resolved Observational Data Integration towards Evaluation of Water Resources (APHRODITE) gridded rainfall data with flood maps derived from Synthetic Aperture Radar (SAR) and multispectral satellite to arrive at holistic spatio-temporal patterns of floods in Sri Lanka. Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) data were used to map flood extents for emergency relief operations while eight-day Moderate Resolution Imaging Spectroradiometer (MODIS) surface reflectance data for the time period from 2001 to 2016 were used to map long term flood-affected areas. The inundation maps produced for rapid response were published within three hours upon the availability of satellite imagery in web platforms, with the aim of supporting a wide range of stakeholders in emergency response and flood relief operations. The aggregated time series of flood extents mapped using MODIS data were used to develop a flood occurrence map (2001–2016) for Sri Lanka. Flood hotpots identified using both optical and synthetic aperture average of 325 km2 for the years 2006–2015 and exceptional flooding in 2016 with inundation extent of approximately 1400 km2. The time series rainfall data explains increasing trend in the extreme rainfall indices with similar observation derived from satellite imagery. The results demonstrate the feasibility of using multi-sensor flood mapping approaches, which will aid Disaster Management Center (DMC) and other multi-lateral agencies involved in managing rapid response operations and preparing mitigation measures. |
| format | Journal Article |
| id | CGSpace92443 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace924432025-03-11T09:50:20Z A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka Alahacoon, Niranga Matheswaran, Karthikeyan Pani, Peejush Amarnath, Giriraj satellite imagery satellite observation radar satellite rain mapping flooding flood control natural disasters economic situation river basins monsoon climate risk management catchment areas Critical information on a flood-affected area is needed in a short time frame to initiate rapid response operations and develop long-term flood management strategies. This study combined rainfall trend analysis using Asian Precipitation—Highly Resolved Observational Data Integration towards Evaluation of Water Resources (APHRODITE) gridded rainfall data with flood maps derived from Synthetic Aperture Radar (SAR) and multispectral satellite to arrive at holistic spatio-temporal patterns of floods in Sri Lanka. Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) data were used to map flood extents for emergency relief operations while eight-day Moderate Resolution Imaging Spectroradiometer (MODIS) surface reflectance data for the time period from 2001 to 2016 were used to map long term flood-affected areas. The inundation maps produced for rapid response were published within three hours upon the availability of satellite imagery in web platforms, with the aim of supporting a wide range of stakeholders in emergency response and flood relief operations. The aggregated time series of flood extents mapped using MODIS data were used to develop a flood occurrence map (2001–2016) for Sri Lanka. Flood hotpots identified using both optical and synthetic aperture average of 325 km2 for the years 2006–2015 and exceptional flooding in 2016 with inundation extent of approximately 1400 km2. The time series rainfall data explains increasing trend in the extreme rainfall indices with similar observation derived from satellite imagery. The results demonstrate the feasibility of using multi-sensor flood mapping approaches, which will aid Disaster Management Center (DMC) and other multi-lateral agencies involved in managing rapid response operations and preparing mitigation measures. 2018 2018-05-02T06:06:28Z 2018-05-02T06:06:28Z Journal Article https://hdl.handle.net/10568/92443 en Open Access MDPI Alahacoon, Niranga; Matheswaran, Karthikeyan; Pani, Peejush; Amarnath, Giriraj. 2018. A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka. Remote Sensing, 10(3):1-18. doi: 10.3390/rs10030448 |
| spellingShingle | satellite imagery satellite observation radar satellite rain mapping flooding flood control natural disasters economic situation river basins monsoon climate risk management catchment areas Alahacoon, Niranga Matheswaran, Karthikeyan Pani, Peejush Amarnath, Giriraj A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka |
| title | A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka |
| title_full | A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka |
| title_fullStr | A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka |
| title_full_unstemmed | A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka |
| title_short | A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka |
| title_sort | decadal historical satellite data and rainfall trend analysis 2001 2016 for flood hazard mapping in sri lanka |
| topic | satellite imagery satellite observation radar satellite rain mapping flooding flood control natural disasters economic situation river basins monsoon climate risk management catchment areas |
| url | https://hdl.handle.net/10568/92443 |
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