Flood Hazards Risk Assessment by Integrated Remote Sensing and GIS Based Morphometric Approach of Swat River Basin

0581672 - ÚI 2024 PK eng A - Abstrakt
Ullah, A. - Usman, M. - Yaseen, M. - Shahid, S. U. - Latif, Yasir - Abbas, S.
Flood Hazards Risk Assessment by Integrated Remote Sensing and GIS Based Morphometric Approach of Swat River Basin.
Abstract Book of 4th International Conference on Emerging Trends in Earth & Environmental Sciences (ETEES 2023). Lahore: College of Earth and Environmental Sciences, University of the Punjab, 2023. s. 91-91.
[ETEES 2023: International Conference on Emerging Trends in Earth & Environmental Sciences /4./. 04.12.2023-06.12.2023, Lahore]
Institucionální podpora: RVO:67985807
Klíčová slova: Flood * Hazards * Risk * Morphometric * Swat River
http://cees.edu.pk/wp-content/uploads/2023/12/ETEES-2023-CONFERENCE-PROGRAM.pdf

Flash floods caused by strong rainstorms are widespread in Pakistan and have frequently resulted in massive damage to lives and infrastructure. Morphometric factors can be helpful in providing a basic understanding of the physical properties of a drainage basin in terms of floods. Thunderstorm-caused flash floods are common in the high mountainous area of Hindukush Himalaya in northern Pakistan. In the current study, three different morphometric analysis methods (morphometric ranking method, morphometric hazard degree method, and compound factor calculating method) were used to assess the risk of flash floods and generate flooding susceptibility maps in the Swat River basin, district Swat, Pakistan. Using the Arc GIS, the watershed and drainage network were delineated using the digital elevation model (DEM). For flash flood simulation, 32 morphometric parameters were used. According to the findings of this study, the morphometric Ranking approach suggests that 71.25% of the area is considered high flood risk probability, 23.83% of the whole subbasin area is considered moderate flood risk probability, and 5.90% of the overall catchment area is considered low flood risk probability. The results of the morphometric hazard degree for flash floods assessment method show that 27.54% of the whole area is high risk susceptibility, 38.02% is moderate flood risk susceptibility, and 5.90% is low flood susceptibility. This indicates that 27.54% of the area is in high danger and directly threatens the town, wetland reserve, and important roadways with predicted flooding. According to the compound factor technique, 24.18% of the region has a high flood risk, 31.88% has a moderate flood risk, and 43.93% has a low flood risk due to a low Relief Ratio (Rh) and a high time of concentration (Tc). The study's findings were thought to aid in the implementation of appropriate corrective measures to mitigate the risk of flash floods in the study area. The most prominent elements launching flash floods in the Swat Catchment area include exceptional repeated heavy rain storms, morphometric properties of drainage networks, pronounced/sharp morphology, and inadequate land cover.
Trvalý link: https://hdl.handle.net/11104/0349783