Evaluating 2021 extreme flash flood of Teesta River
Due to global warming, extreme hydroclimatic events (e.g., floods) are expected to happen more frequently and last longer. This study investigated such an extreme flood in the transboundary Teesta River that occurred in October 2021. We attempted to quantify the event's impact using data from t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-10-01
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| Series: | Hydrology Research |
| Subjects: | |
| Online Access: | http://hr.iwaponline.com/content/54/10/1095 |
| _version_ | 1797630949752569856 |
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| author | Shampa Israt Jahan Nejhum Md. Manjurul Hussain Mohammad Muddassir Islam Rubaid Hassan Zoha |
| author_facet | Shampa Israt Jahan Nejhum Md. Manjurul Hussain Mohammad Muddassir Islam Rubaid Hassan Zoha |
| author_sort | Shampa |
| collection | DOAJ |
| description | Due to global warming, extreme hydroclimatic events (e.g., floods) are expected to happen more frequently and last longer. This study investigated such an extreme flood in the transboundary Teesta River that occurred in October 2021. We attempted to quantify the event's impact using data from time series flood levels, precipitation-related satellite images, and two-dimensional hydromorphological modeling. We found it challenging for people to cope with such a hazardous event since the depth of the flooding increased 6.98-fold in just 24 h. Our simulation results indicate that a sand-filled sediment measuring 0.27 m thick covered more than 33% cropland, and the velocity increased by almost 2.5 times. 136,000 individuals were marooned in the water. Compared to previous flooding events in its basin, which occurred in India and Bangladesh, the river appears to have some natural shock absorption features, i.e., a wide braided plain. We propose impact-based forecasting with a proactive early response as a valuable tool for managing such extreme events.
HIGHLIGHTS
Evidence of an extreme climatic event and its impact.;
Identifies natural shock absorbing phenomena of a river.;
Looks into the flood from hydromorphological consequences and human impact.;
Suggests how to manage such an extreme event in a better way.; |
| first_indexed | 2024-03-11T11:15:03Z |
| format | Article |
| id | doaj.art-1023295776db44d9b60356a2a769b1a1 |
| institution | Directory Open Access Journal |
| issn | 1998-9563 2224-7955 |
| language | English |
| last_indexed | 2024-03-11T11:15:03Z |
| publishDate | 2023-10-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Hydrology Research |
| spelling | doaj.art-1023295776db44d9b60356a2a769b1a12023-11-11T06:48:35ZengIWA PublishingHydrology Research1998-95632224-79552023-10-0154101095111410.2166/nh.2023.122122Evaluating 2021 extreme flash flood of Teesta RiverShampa0Israt Jahan Nejhum1Md. Manjurul Hussain2Mohammad Muddassir Islam3Rubaid Hassan Zoha4 Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh Due to global warming, extreme hydroclimatic events (e.g., floods) are expected to happen more frequently and last longer. This study investigated such an extreme flood in the transboundary Teesta River that occurred in October 2021. We attempted to quantify the event's impact using data from time series flood levels, precipitation-related satellite images, and two-dimensional hydromorphological modeling. We found it challenging for people to cope with such a hazardous event since the depth of the flooding increased 6.98-fold in just 24 h. Our simulation results indicate that a sand-filled sediment measuring 0.27 m thick covered more than 33% cropland, and the velocity increased by almost 2.5 times. 136,000 individuals were marooned in the water. Compared to previous flooding events in its basin, which occurred in India and Bangladesh, the river appears to have some natural shock absorption features, i.e., a wide braided plain. We propose impact-based forecasting with a proactive early response as a valuable tool for managing such extreme events. HIGHLIGHTS Evidence of an extreme climatic event and its impact.; Identifies natural shock absorbing phenomena of a river.; Looks into the flood from hydromorphological consequences and human impact.; Suggests how to manage such an extreme event in a better way.;http://hr.iwaponline.com/content/54/10/1095delft3dflood damageflash floodgpmteesta |
| spellingShingle | Shampa Israt Jahan Nejhum Md. Manjurul Hussain Mohammad Muddassir Islam Rubaid Hassan Zoha Evaluating 2021 extreme flash flood of Teesta River Hydrology Research delft3d flood damage flash flood gpm teesta |
| title | Evaluating 2021 extreme flash flood of Teesta River |
| title_full | Evaluating 2021 extreme flash flood of Teesta River |
| title_fullStr | Evaluating 2021 extreme flash flood of Teesta River |
| title_full_unstemmed | Evaluating 2021 extreme flash flood of Teesta River |
| title_short | Evaluating 2021 extreme flash flood of Teesta River |
| title_sort | evaluating 2021 extreme flash flood of teesta river |
| topic | delft3d flood damage flash flood gpm teesta |
| url | http://hr.iwaponline.com/content/54/10/1095 |
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