黑龙江省直击雷防护效率空间分布特征

doi:10.3969/j.issn.1673-503X.2020.01.013

Abstract

Abstract:

Based on lightning location data in Heilongjiang province, the spatial distribution characteristics of ground flash density, ground flash intensity, shielding failure rate and counterattack rate were studied and the protection efficiencies of the different types of direct lightning were analyzed by using IDW and Pearson correlation analysis method.The results show that the spatial distributions of ground flash density and intensity are negatively correlated and the correlation coefficient is -0.608.The shielding failure rate is positively correlated with the ground flash density but is negatively correlated with the ground flash intensity.The counter-attack rate is negatively correlated with the ground flash density and is positively correlated with the ground flash intensity.In addition, the shielding failure rates of the first, second and third types of lightning protection buildings in Heilongjiang province are 0.04%, 0.71%, and 4.59%, meaning that the lightning protection efficiencies of three types of direct lightning protection buildings are 99.96%, 99.29%, and 95.41%, respectively.Besides, when the safety distances of the lightning protection buildings are calculated according to the design norm for protection of structures against lightning, the risk of counterattack of the first, second and third types of lightning protection buildings will reach 3.16% 4.64% and 7.32%, respectively.

Key words: Direct lightning, Protection efficiency, Shielding failure rate, Counterattack rate

CLC Number:

P427.3

Xiang-ling YUAN,Hong-xu MA,Qian ZHOU,Sen MU,Shao-jie YOU. Spatial characteristics of the protection efficiency of the direct lightning in Heilongjiang province[J]. Journal of Meteorology and Environment, 2020, 36(1): 96-101.

Figures/Tables 7

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References 24

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防雷类别	一类	二类	三类
与地闪密度的相关系数	0.086	0.300	0.564
与地闪强度的相关系数	-0.165	-0.212	-0.404

防雷类别	一类	二类	三类
地闪密度	-0.077	-0.214	-0.422
地闪强度	0.742	0.807	0.925

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Spatial characteristics of the protection efficiency of the direct lightning in Heilongjiang province

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防雷类别	绕击率	反击率	防护效率
一类	0.04	3.16	99.96
二类	0.71	4.64	99.29
三类	4.59	7.32	95.41