河北张家口地区雹灾区划研究

使用雹灾汇报资料,对本区的雹灾受灾频率、重灾频率和成灾面积比的分布做了区划分析。结果显示：受灾频率较大的地区基本与本区的坝头地带、坝上西部及复杂山地配合;较小的地区是海拔最低的洋河谷地。重灾频率和成灾面积比的分布与受灾频率基本相反。分析原因,主要是雹块大小与海拔高度呈反相关以及生长期的差异。

A study on zoning of hail hazard in Zhangjiakou,Hebei province

By using the reported data of haildisasters, a zoning analysis on the frequency of hail disaster, frequency of heavy haildisaster and distribution of ratio of area that affected by hailstone in Zhanjiakou ismade. The results show that the district with higher frequency of hail disaster isbasically matched with upper zone and western part of flatland and also the complexmountainous area in this region. The district with lower frequency of hail disaster is inthe valley with the lowest altitude. The distribution of ratio of heavy disaster frequencyto the area affected by hailstone is basically contrary. The analysis indicates that it ismainly because of retro-correlation of size of hailstone with the height above sea leveland also because of differences of hail growth period.