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Use of remote sensing data in comprehending an extremely unusual flooding event over southwest Bangladesh

Author

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  • Ehsan H. Chowdhury

    (University of Calgary
    Center for Environmental and Geographic Information Services (CEGIS))

  • Quazi K. Hassan

    (University of Calgary)

Abstract

Flooding is one of the natural disasters that affect the livelihood of the people living in the floodplains, like Bangladesh. Here, we proposed to employ SAR satellite images in assessing the flood extent and crop damage with the hydrometeorological observations in the southwestern region of Bangladesh. We observed that the unusual flood of the year 2000 was the combined effect of the huge amount of rainfall in the local areas as well as oncoming water flows from West Bengal in India. During late monsoon of 2000, we experienced that the amount of rainfall was in several magnitudes (250–450%) than the expected over the region. Bangladesh, one of the largest deltas in the world, in general experienced recurrent flood events from the spill of the three mighty rivers in every year. However, we observed that during 2000 the river situation was slightly above the average year conditions and below the moderate level of flood warning conditions, indicating non-riverine flooding. Therefore, we used the SAR images in delineating the flood extent and its damages for the standing aman crops. We observed that the flood extent mapping was having more than 95% agreements with the ground data and crop damage information was about 75% in agreement with the government estimates. The flood extent and crop damage map was found to be useful during the unprecedented flood in the southwestern region of Bangladesh. The use of near real-time SAR imageries thus would be helpful in developing strategies for flood management and disaster mitigation activities and could be utilized on a regular basis.

Suggested Citation

  • Ehsan H. Chowdhury & Quazi K. Hassan, 2017. "Use of remote sensing data in comprehending an extremely unusual flooding event over southwest Bangladesh," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 88(3), pages 1805-1823, September.
    • Handle: RePEc:spr:nathaz:v:88:y:2017:i:3:d:10.1007_s11069-017-2947-7
    DOI: 10.1007/s11069-017-2947-7
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    References listed on IDEAS

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    1. Sanjay Jain & R. Singh & M. Jain & A. Lohani, 2005. "Delineation of Flood-Prone Areas Using Remote Sensing Techniques," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 19(4), pages 333-347, August.
    2. Roxana Hoque & Daichi Nakayama & Hiroshi Matsuyama & Jun Matsumoto, 2011. "Flood monitoring, mapping and assessing capabilities using RADARSAT remote sensing, GIS and ground data for Bangladesh," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 57(2), pages 525-548, May.
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    Cited by:

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    2. Md Shahinoor Rahman & Liping Di, 2020. "A Systematic Review on Case Studies of Remote-Sensing-Based Flood Crop Loss Assessment," Agriculture, MDPI, vol. 10(4), pages 1-30, April.

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