An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan
The paper presents a moderate resolution imaging spectroradiometer (MODIS) time-series imagery-based algorithm for detection and mapping of seasonal and annual changes in flood extent, and tests this using the flooding of the Indus River Basin in 2010 – one of the greatest recent disasters that affe...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2016-09-01
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| Series: | Geomatics, Natural Hazards & Risk |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/19475705.2015.1084953 |
| _version_ | 1818976583786954752 |
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| author | Giriraj Amarnath Ameer Rajah |
| author_facet | Giriraj Amarnath Ameer Rajah |
| author_sort | Giriraj Amarnath |
| collection | DOAJ |
| description | The paper presents a moderate resolution imaging spectroradiometer (MODIS) time-series imagery-based algorithm for detection and mapping of seasonal and annual changes in flood extent, and tests this using the flooding of the Indus River Basin in 2010 – one of the greatest recent disasters that affected more than 25 million people in Pakistan. The algorithm was applied to produce inundation maps for 10 annual flood seasons over the period from 2000 to 2011. The MODIS flood products were validated in comparison with advanced land observing system (ALOS) sensors, which have both advanced visible and near infrared radiometer and phased array type L-band synthetic images using the flood fraction comparison method. A simple threshold method is created to cluster the data to identify the flood pixels in the imagery. Calculations are then made to estimate a flood area for each resolution. A statistical study is performed to analyze false positive and false negative rates using the ALOS sensors as ‘ground truth’. Comparison of two flood products at a grid size of 10 km resulted in the coefficient of determination range of 0.72–0.97. This research points to a relevant spatial resolution that could be effectively used to obtain accurate mapped products of the extent of the inundated area. The approach can be used to quantify the damage caused by floods. |
| first_indexed | 2024-12-20T16:14:10Z |
| format | Article |
| id | doaj.art-5431dc0dd4784699999e65c27266b2ce |
| institution | Directory Open Access Journal |
| issn | 1947-5705 1947-5713 |
| language | English |
| last_indexed | 2024-12-20T16:14:10Z |
| publishDate | 2016-09-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj.art-5431dc0dd4784699999e65c27266b2ce2022-12-21T19:33:53ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132016-09-01751526153710.1080/19475705.2015.10849531084953An evaluation of flood inundation mapping from MODIS and ALOS satellites for PakistanGiriraj Amarnath0Ameer Rajah1International Water Management Institute (IWMI)International Water Management Institute (IWMI)The paper presents a moderate resolution imaging spectroradiometer (MODIS) time-series imagery-based algorithm for detection and mapping of seasonal and annual changes in flood extent, and tests this using the flooding of the Indus River Basin in 2010 – one of the greatest recent disasters that affected more than 25 million people in Pakistan. The algorithm was applied to produce inundation maps for 10 annual flood seasons over the period from 2000 to 2011. The MODIS flood products were validated in comparison with advanced land observing system (ALOS) sensors, which have both advanced visible and near infrared radiometer and phased array type L-band synthetic images using the flood fraction comparison method. A simple threshold method is created to cluster the data to identify the flood pixels in the imagery. Calculations are then made to estimate a flood area for each resolution. A statistical study is performed to analyze false positive and false negative rates using the ALOS sensors as ‘ground truth’. Comparison of two flood products at a grid size of 10 km resulted in the coefficient of determination range of 0.72–0.97. This research points to a relevant spatial resolution that could be effectively used to obtain accurate mapped products of the extent of the inundated area. The approach can be used to quantify the damage caused by floods.http://dx.doi.org/10.1080/19475705.2015.1084953Flood disasterspatial and temporal changeMODISALOSPakistan |
| spellingShingle | Giriraj Amarnath Ameer Rajah An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan Geomatics, Natural Hazards & Risk Flood disaster spatial and temporal change MODIS ALOS Pakistan |
| title | An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan |
| title_full | An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan |
| title_fullStr | An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan |
| title_full_unstemmed | An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan |
| title_short | An evaluation of flood inundation mapping from MODIS and ALOS satellites for Pakistan |
| title_sort | evaluation of flood inundation mapping from modis and alos satellites for pakistan |
| topic | Flood disaster spatial and temporal change MODIS ALOS Pakistan |
| url | http://dx.doi.org/10.1080/19475705.2015.1084953 |
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