摘要
干旱是西北地区最严重的灾害,利用西北地区降水和农作物旱灾面积统计资料,将干旱灾害事件与影响因子进行对比分析,结果表明:厄尔尼诺事件当年或次年,南方涛动指数负距平,太阳黑子低值,青藏高原为多雪年,地表径流枯期,西北干旱灾害发生率较高。
Drought is the most severe disaster in northwest China Based on the statistical data of precipitation and drought disasters of crop, a comparative analysis is made on the influencing factors and drought disasters Results show that, in the year or next year that El Ni?o occurs, values of sunspots are low, Southern Oscillation Index (SOI) is negative, it is snowy year on QinghaiXizangy, the surface runoff dries up, and frequency of drought disasters is relatively high in the northwest China
出处
《灾害学》
CSCD
2003年第2期18-22,共5页
Journal of Catastrophology
基金
陕西省教育厅专项基金资助项目(00JK147)
关键词
干旱灾害
影响因子
西北
drought disaster
influencing factors
northwest China
