Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020
The analysis of temporal and spatial variability in risk has garnered significant research attention, particularly regarding flash flood disasters in the context of warming and wetting conditions on the Qinghai–Tibetan Plateau. Focusing on the Lhasa River basin, this study develops a framework that...
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2024-10-01
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| Series: | ISPRS International Journal of Geo-Information |
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| author | Xiaoran Fu Zhonggen Wang Hongquan Sun Dong Wang Jiayu Tian Pingping Sun Xin Su Liaofeng Liang |
| author_facet | Xiaoran Fu Zhonggen Wang Hongquan Sun Dong Wang Jiayu Tian Pingping Sun Xin Su Liaofeng Liang |
| author_sort | Xiaoran Fu |
| collection | DOAJ |
| description | The analysis of temporal and spatial variability in risk has garnered significant research attention, particularly regarding flash flood disasters in the context of warming and wetting conditions on the Qinghai–Tibetan Plateau. Focusing on the Lhasa River basin, this study develops a framework that integrates geographic information systems and a combined subjective–objective weighting approach to comprehensively assess flash flood risk despite limited observations. This paper investigates the distribution patterns of hazard, vulnerability, and the integrated risk of pluvial flash floods; demonstrates the reliability of the assessment results; and provides mitigation recommendations for disaster risk management at the county level. The results showed a trend in increasing flash flood risk in recent decades compared to the 1990s. Moreover, very-high- and high-risk areas were concentrated in downstream regions with frequent precipitation extremes and anthropogenic activity. From 1991 to 2020, the high to very high-risk areas gradually expanded from central Lhasa to neighbouring counties. This study contributes valuable insights into flash flood risk assessment cand mapping, which are crucial in terms of the protection of life and property in the plateau basin. |
| format | Article |
| id | doaj-art-5fb5be70ee0240aaa5e9eec6a6672429 |
| institution | OA Journals |
| issn | 2220-9964 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ISPRS International Journal of Geo-Information |
| spelling | doaj-art-5fb5be70ee0240aaa5e9eec6a66724292025-08-20T01:54:07ZengMDPI AGISPRS International Journal of Geo-Information2220-99642024-10-01131138710.3390/ijgi13110387Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020Xiaoran Fu0Zhonggen Wang1Hongquan Sun2Dong Wang3Jiayu Tian4Pingping Sun5Xin Su6Liaofeng Liang7National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, ChinaNational Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, ChinaNational Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056002, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, ChinaBeijing Engineering Consulting Company, Beijing 100083, ChinaNational Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaNational Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, ChinaThe analysis of temporal and spatial variability in risk has garnered significant research attention, particularly regarding flash flood disasters in the context of warming and wetting conditions on the Qinghai–Tibetan Plateau. Focusing on the Lhasa River basin, this study develops a framework that integrates geographic information systems and a combined subjective–objective weighting approach to comprehensively assess flash flood risk despite limited observations. This paper investigates the distribution patterns of hazard, vulnerability, and the integrated risk of pluvial flash floods; demonstrates the reliability of the assessment results; and provides mitigation recommendations for disaster risk management at the county level. The results showed a trend in increasing flash flood risk in recent decades compared to the 1990s. Moreover, very-high- and high-risk areas were concentrated in downstream regions with frequent precipitation extremes and anthropogenic activity. From 1991 to 2020, the high to very high-risk areas gradually expanded from central Lhasa to neighbouring counties. This study contributes valuable insights into flash flood risk assessment cand mapping, which are crucial in terms of the protection of life and property in the plateau basin.https://www.mdpi.com/2220-9964/13/11/387flash flood disasterrisk assessmentflood hazardflood vulnerabilityLhasa River basinGIS |
| spellingShingle | Xiaoran Fu Zhonggen Wang Hongquan Sun Dong Wang Jiayu Tian Pingping Sun Xin Su Liaofeng Liang Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020 ISPRS International Journal of Geo-Information flash flood disaster risk assessment flood hazard flood vulnerability Lhasa River basin GIS |
| title | Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020 |
| title_full | Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020 |
| title_fullStr | Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020 |
| title_full_unstemmed | Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020 |
| title_short | Spatio-Temporal Variation in Pluvial Flash Flood Risk in the Lhasa River Basin, 1991–2020 |
| title_sort | spatio temporal variation in pluvial flash flood risk in the lhasa river basin 1991 2020 |
| topic | flash flood disaster risk assessment flood hazard flood vulnerability Lhasa River basin GIS |
| url | https://www.mdpi.com/2220-9964/13/11/387 |
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