| 德清县雷电时空分布特征及雷击灾害风险区划 |
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| 引用本文： | 顾丽华,蔡云泉,李嘉鹏,李利松,万奎.德清县雷电时空分布特征及雷击灾害风险区划[J].辽宁气象,2012(4):73-78. |
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| 作者姓名： | 顾丽华 蔡云泉 李嘉鹏 李利松 万奎 |
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| 作者单位： | [1]德清县气象局,浙江德清313200 [2]浙江省气象台,浙江杭州310017 |
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| 基金项目： | 浙江省气象局重点科技项目（2008ZD09）“气象灾害防御规划的编制与研究”资助 |
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| 摘 要： | 利用近4 a德清县地闪数据,采用网格法绘制地闪密度图,并对近40 a德清雷县暴日数据进行分析,同时对雷击灾害风险进行区划研究。结果表明：20世纪70—80年代德清县雷暴日较90年代和2000年以后偏多;1971—2000年雷暴日呈下降趋势,但2000年后雷暴日数呈上升趋势;除12月以外每月均有雷暴发生,7月和8月为雷暴日高发期;春夏季雷暴日较多,秋季次之,冬季较少发生雷暴。雷电主要出现在12—13时和15—16时。至2010年,德清县大部分乡镇地闪密度均大于4次/km2,落雷密集区面积逐年增加,高密集区有向山区和东北部乡镇扩散的趋势。落雷的分布与地形有密切关系,西北部高海拔山区和海拔在50—200 m的低坡丘陵地带落雷密度较大。德清县莫干山至对河口水库一带、县城武康北部、洛舍和钟管镇交界一带及雷甸镇西南部均为雷电灾害高风险区。
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| 关 键 词： | 雷电 地闪密度 风险区划 德清县 |
Temporal and spatial distributions of thunder and lightning and risk division of thunder stroke disaster in Deqing County,Zhejiang province |
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| GU Li-hua,CAI Yun-quan,LI Jia-peng,LI Li-song,WAN Kui.Temporal and spatial distributions of thunder and lightning and risk division of thunder stroke disaster in Deqing County,Zhejiang province[J].Liaoning Meteorological Quarterly,2012(4):73-78. |
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| Authors: | GU Li-hua CAI Yun-quan LI Jia-peng LI Li-song WAN Kui |
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| Institution: | 1(1.Deqing County Meteorological Service,Deqing 313200,China;2.Zhejiang Meteorological Observatory,Hangzhou 310016,China) |
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| Abstract: | Based on the ground lightning data from 2007 to 2010,the density map of ground lightning was drawn by a grid method.The variation of thunderstorm days was analyzed based on the corresponding data in the recent 40 years and risk division of thunder stroke disaster was estimated.The results indicate that the thunderstorm days from 1970s to 1980s are more than those in 1990s and after 2000.The thunderstorm days are in a decreasing trend from 1971 to 2000,while it is in a increasing trend after 2000.There exists thunderstorm in each month except in December,especially in July and August.The thunderstorm occurs mostly in spring and summer,then in autumn,and it is seldom in winter.The thunder and lightning often happens from 12：00 to 13：00 and from 15：00 to 16：00.By 2010,the density of ground lightning is more than 4 times per square kilometer in most areas of Deqing County.The falling areas of dense thunderstorm increases yearly,the high-density area has a diffusion trend to mountain area and the northeast towns.The falling area of thunderstorm has a close relation with topography,and the high-density area is located in the northwest mountain area with the high altitude and in the low slope foothill with the altitude of 50-200 m.The high risk areas of thunder stroke disaster are from Moganshan to Duihekou regions of Deqing County,in the junction of the north of Wukang,Luoshe and Zhongguan and in the southwest of Leidian of Deqing County. |
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| Keywords: | Thunder and lightning Ground lightning density Risk division Deqing County |
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