湖北省山區與平原雷電分布及其參數特征
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湖北省雷電災害防御科研專項(FLY201402)資助


Distribution of Lightning and Parameter Characteristics for Mountain and Plain Areas of Hubei Province
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    摘要:

    為進一步了解山區與平原雷電參數分布特征及其差異,為山區和平原地區雷電防護工程設計和雷擊風險評估提供參考,根據湖北省ADTD地閃定位系統2006年12月至2016年12月監測的資料,采用數理統計方法,對山區和平原地區的地閃頻次、極性、雷電流幅值和波頭陡度等參數分布特征進行了對比研究。結果表明:①山區地閃密度略高于平原地區,平原正地閃百分比稍高于山區,近10年的正地閃百分比呈上升趨勢。②正地閃平均強度山區比平原大1.16 kA,負地閃平均強度山區比平原小3.67 kA,平原總地閃平均強度比山區大3.46 kA。③總地閃小雷電流幅值(I≤30 kA)概率山區比平原大8.9%,大雷電流幅值(I>100 kA)概率平原比山區大0.6%。④山區正地閃平均陡度分別比負、總地閃平均陡度大2.44 kA/μs和2.31 kA/μs,平原正、負、總地閃平均陡度分別比山區大341 kA/μs、5.77 kA/μs和5.64 kA/μs??梢缘贸?,山區小雷電流繞擊率大于平原,正地閃雷電感應的危害大于負地閃和總地閃;平原地區大雷電流反擊率比山區大,雷電感應的危害大于山區。

    Abstract:

    In order to understand the distribution characteristics of lightning parameters for mountain and plain areas and their difference, and to bring up reference opinions on lightning protection engineering design and lightning risk assessment, the study utilizes the lightning monitoring data from December 2006 to December 2016, by mathematical statistics method, to make a contrastive analysis about the distribution characteristics of the frequency, polarity, peak current, and wave front steepness. The results show that the density of cloudtoground (CG) lightning in the mountain area was higher than that in the plain area; the percentage of positive CG lightning in the plain area was higher than that in the mountain area; and the percentage of positive flashes in the past 10 years had an increasing trend. The average intensity of positive CG lightning in the mountain area was 1.16 kA greater than that in the plain area, and the average intensity of negative CG lightning in the mountain area is 3.67 kA smaller than that in plain area, and intensity of total CG lightning in the plain area is 3.46 kA greater than that in the mountain area. The probability of lightning peak current (≥30 kA in the mountain area, 8.9% greater than that in the plain area). As the lightning peak current was greater than 100 kA, the probability in the plain area was 0.6% greater than that in the mountain area. The average steepness of positive CG lightning in the mountain area was 2.44 kA/μs and 2.31 kA/μs greater than that of negative and total CG lightning respectively, and the average steepness of positive, negative, and total CG lightning in the plain area was 3.41 kA/μs, 5.77 kA/μs, and 5.64 kA/μs greater than those in the mountain area, respectively. It shows that the probability of shielding failure in the mountain area is higher than that in the plain area, and the damage of positive CG lightning induction was greater than that of negative and total CG lightning; the occurrence of back flashover in plain is higher than that in the mountain area, and the damage of lightning induction was greater than that in the mountain area.

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王學良,張科杰,余田野,汪姿荷.湖北省山區與平原雷電分布及其參數特征[J].氣象科技,2019,47(2):337~348

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  • 收稿日期:2018-03-13
  • 定稿日期:2018-09-30
  • 錄用日期:
  • 在線發布日期: 2019-04-24
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