WANG Hua,YANG Qianpeng.Lightning Risk Division for Nyingchi City[J].Journal of Chengdu University of Information Technology,2019,(06):659-663.[doi:10.16836/j.cnki.jcuit.2019.06.015]
林芝市雷电风险区划
- Title:
- Lightning Risk Division for Nyingchi City
- 文章编号:
- 2096-1618(2019)06-0659-05
- Keywords:
- meteorology; lightning risk division; lightning frequency; lightning intensity; GIS; Nyingchi
- 分类号:
- P427.32+1
- 文献标志码:
- A
- 摘要:
- 为更好地开展雷电灾害防御工作,提高服务水平,减少雷电灾害带来的影响,对林芝市雷电风险等级划分进行研究。首先运用数理统计法、GIS空间分析法、克里金插值法,通过分析研究雷暴日数据及ADTD地闪数据,得到林芝市雷电活动时空特征。然后利用层次分析法,结合林芝市土地利用分类情况、雷电灾害土地利用特点及城乡人口分布情况等数据,计算评价指标权重并建立雷电风险计算模型; 最后采用GIS空间分析法和自然断点法,完成林芝市雷电风险等级划分。结果表明,林芝市巴宜区、米林、波密、察隅各站30 a平均雷暴日数分别为27.9 d、15.2 d、7.2 d、9.1 d,多发于夏季,春季次之,秋季很少,冬季几乎不发生。雷电主要出现在15:00-21:00,且在17时达到峰值。林芝市雷电频次西部高于东部,南部高于北部,主要发生在朗县、工布江达县境内、巴宜区、米林县西部及墨脱县中南部。林芝市朗县、工布江达县、墨脱县西边均为雷电灾害高风险区,米林县、巴宜区、墨脱县南部以及工布江达县、巴宜区、波密县交界处一带属雷电灾害次高风险区。
- Abstract:
- The This paper is aimed to study studies the classification of lightning risk level of Nyingchi(city of Tibet)for better service in preventing of lightning disaster and bringing down the impact caused by the hazard. Firstly, the temporal and spatial characteristics of the occurrence of lightning are concluded obtained by analyzing employing the mathematical statistics, GIS spatial analysis and Kriging Interpolation method to analyze the data of thunderstorm days and ADTD flash with mathematical statistics method, GIS spatial analysis method and Kriging Interpolation employed..Then, based on the data of the circumstances of land use classification, the utility characteristics of land struck by lightning and population distribution in Nyingchi City, the weight of evaluation index is calculated and then the lightning risk calculation model is established by using analytic hierarchy process(AHP). Finally, GIS spatial analysis method and natural breakpoint method are applied to classify the lightning risk in of Nyingchi City. The results indicate that the 30 a average values of thunderstorm days in the stations of Bayi District, Mainling County, Bomê County and Zayü County in Nyingchi City were are 27.9 d,15.2 d,7.2 d and 9.1 d,respectively. Most thunderstorm days happened happens mostly in spring and summer, many in follow by autumn, and few in autumn winter and nearly none in winter. Lightning occurred frequently during 15:00-21:00 and peaked at 17:00. The lightning frequency in western Nyingchi City is higher than that in the eastern part and it is higher in southern Nyingchi City than that in the northern part, with major occurrence in Nang County, Gongbo’gyamda County, Bayi District, western Mainling County and south-central Mêdog County. In Nyingchi City, the high-risk areas of lightning disasters are Nang County, Gongbo’gyamda County and western Mêdog County, and the secondary high-risk areas of lightning disasters are Mainling County, Bayi District, southern Mêdog County and the border zone of Gongbo’gyamda County, Bayi District and Bomê County.
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备注/Memo
收稿日期:2019-03-11基金项目:西藏自治区科技计划资助项目(XZ201801-GB-12)