衡阳干旱气候特点及变化规律

衡阳是干旱多发区,尤其是近些年来,随着全球气候的变暖,干旱强度越来越大,干旱发生频率加快,对当地经济发展的制约日趋明显。统计表明,历年夏秋旱发生的概率为57.14%,其中干旱、大旱和特大干旱发生的概率分别为34.33%、31.23%和34.44%,夏秋旱的变化周期为15年。在分析了解衡阳干旱特点的基础上提出了衡阳市抗旱对策。

The Characteristic and Change Rule of Drought Climate in Hengyang

Hengyang is a frequently droughty region,especially in the latest years and with the global climate rising,the drought had appeared more frequently and more gravely.As a result,it held back the economy growth obviously day after day.According to the statistics,the probability of drought in summer and fall was 57.14 percent,in which the probability of drought was 34.33 percent,great drought was 31.23 percent and extreme drought was 34.44 percent.The cycle of drought in summer and fall in Hengyang was 15 years.In this paper,the drought trace of Hengyang was analyzed and the measures to anti-drought were brought forward according to the character of the drought in Hengyang.