Riverine flood mapping and impact assessment using remote sensing technique: a case study of Chenab flood-2014 in Multan district, Punjab, Pakistan

Asif Sajjad (), Jianzhong Lu (), Xiaoling Chen (), Chikondi Chisenga (), Nausheen Mazhar () and Basit Nadeem ()
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Asif Sajjad: Wuhan University
Jianzhong Lu: Wuhan University
Xiaoling Chen: Wuhan University
Chikondi Chisenga: Malawi University of Science and Technology
Nausheen Mazhar: Lahore College for Women University
Basit Nadeem: Bahauddin Zakariya University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2022, vol. 110, issue 3, No 36, 2207-2226

Abstract: Abstract The Multan district is mainly prone to riverine floods but has remained understudied. Chenab flood-2014 was the worst flood that this district experienced in recorded history. This study applies remote sensing (RS) techniques to estimate the extent, calculate duration, assess the major causes and resulting impacts of the flood-2014, using Landsat-8 OLI images. These images were obtained for pre-flood, during-flood and post-flood instances. Secondary data of flood causing factors were obtained for comprehensive analysis. Spatially trained and validated datasets were obtained through Google Earth platform and Global positioning system. The supervised classification with maximum likelihood algorithm was used to classify land use and land cover of the study area. The Modified Normalized Difference Water Index was utilized to detect flood inundation extent and duration, and Normalized Difference Vegetation Index was utilized to monitor vegetation coverage and changes. The analysis allowed us to assess flood causes, and calculate the extent of the flooded areas with duration and recession, as well as damages to standing crops and built-up areas. The results revealed that the flood-2014 occurred due to heavy rains in early September in upper Chenab catchment. The flood inundation continued for around two months, which heavily affected agriculture and built-up areas. The present study introduces practical use of RS techniques to provide basis for effective flood inundation mapping and impact assessment, as an application for early flood response and recovery in the world.

Keywords: River Chenab; Remote sensing; Landsat-8; MNDWI; Riverine flood mapping; Impact assessment (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s11069-021-05033-9

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