| Temporal and spatial characteristics of hail and its impact evaluation on fruit farming in Hebei Province |
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| DOI：10.7606/j.issn.1000-7601.2020.05.28 |
| Key Words: hail spatial and temporal distribution fruit farming losses assessment model classification of disaster intensity Hebei Province |
| Author Name | Affiliation | | LI Jiao | Hebei Meteorological Disaster Prevention Center, Shijiazhuang, Hebei 050021, China | | WANG Lirong | Hebei Meteorological Disaster Prevention Center, Shijiazhuang, Hebei 050021, China | | ZHANG Qi | Nanjing University of Information Science and Technology School of Applied Meteorology, Nanjing, Jiangsu 210044, China | | SUN Yulong | Hebei Meteorological Disaster Prevention Center, Shijiazhuang, Hebei 050021, China | | ZHANG Anningzhi | Hebei Meteorological Disaster Prevention Center, Shijiazhuang, Hebei 050021, China |
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| Abstract: |
| Based on the historical data of hail disasters and meteorology from 1951 to 2018, the temporal and spatial distribution characteristics of hail days in Hebei Province were analyzed. Relevant meteorological elements (extreme wind speed, hail size, and hailing duration) were identified to build a hail disaster risk assessment model for fruit farming in Hebei Province. Five disaster intensity levels were divided by optimal segmentation method, and the critical thresholds for each level were established accordingly. Based on the model, the impact of hail disasters on fruit farming in 2019 was evaluated. The result showed that the hail days decreased at a rate of 0.26 d·10a-1; Hail disaster usually occurred during March to November, and most frequently between May to July, the number of occurrences during this time was 65.1% of the total number of the whole year, especially in June, the occurrences rate was as high as 30%, the hail mainly occurred from afternoon to sunset,peaked at 16∶00. The hail days changed significantly with the topography, which showed more hail disasters occurred in mountainous areas than on plains. The most relevant disaster\|causing factors were hail size and hailing duration. In 2019, the hail disaster in Hebei Province had a small impact on fruit farming, and the losses were relatively small. |
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