Variation Characteristics of Wind Disasters at Different Levels in Xinjiang from 1990 to 2019
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Abstract:
The wind disaster has caused great harm to agricultural and animal husbandry production in Xinjiang. In this study, the number of collapsed houses, collapsed sheds, death toll, damaged sheds, livestock deaths, and the affected areas of crops are taken as the six major disaster factors to construct a disaster index that can comprehensively express the wind disaster intensity using the ratio weight and dimensionless linear summation method. Based on the percentile method, the intensity of the wind disaster events is divided into four levels: general (level 1), heavy (level 2), severe (level 3), and extra heavy (level 4). The disaster damage index and disaster level are used to study the temporal and spatial variation characteristics of wind disasters in Xinjiang. The results show that the wind disasters in Xinjiang are concentrated from April to May, more in the southern Xinjiang than in the northern Xinjiang, and the Turpan Basin and the northern Tarim Basin are the frequent and serious wind disaster areas in Xinjiang. The annual occurrence times of wind disasters in the recent 30 years show a significant linear increasing trend. The annual disaster loss index does not show a linear increasing or decreasing trend, among which the interannual variation of level 1 to 4 wind disasters has apparent differences. The maximum wind speed thresholds causing level 1 to 4 wind disasters are 12.9, 13.7, 14.1 and 15.0 m·s-1, respectively. The number of days when the maximum wind speed exceeds 12.9 m·s-1 increases year by year, coupled with the rapid development of agriculture and animal husbandry production, resulting in the continuous increase of the number of wind disasters in the year.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.