以陇南嘉陵江流域武都区气象站提供的1959 年- 2008 年的月降水资料为基础数据, 分析了该区近50 年来 降水变化特征, 并应用Mann2Kendall 检验方法进行了突变性检验。结果表明: 武都区降水量年内分配不均, 降水主 要集中在5 月- 9 月份, 占全年降水量的79. 1%; 降水年际变化明显, 1983 年的年降水量是近50 年历史最高值, 年 平均降水量为574. 25 mm, 1997 年是降水量最低值, 降水量为225. 41 mm, 是近50 年干旱较严重年份; 进入21 世 纪后降水量波动不大, 2006 年以后年降水量呈逐年增加的趋势。

Based o n the mo nthly pr ecipitatio n data fr om 1959 to 2008 prov ided by the Bureau o f M et eo ro lo gy o f Wudu ar ea in the Jialing Riv er Basin of Lo ng nan, the character istics o f precipitat ion change in the last 50 y ears w ere analyzed, and the Mann2Ken2 dall metho d was used to perform the mutat ion test of pr ecipitatio n. The r esults showed t hat precipitation has an uneven distribu2 tion within a year w ith 79. 1% occurr ing fr om May to September; there is an obvio usly int erannual var iatio n in pr ecipitatio n in the last 50 years w ith the highest annual pr ecipitation of 574. 25 mm in 1983 and low est annual pr ecipitatio n of 225. 41 mm in 1997; and precipitat ion has little fluctuat ion in the 21st century , and increases gr adually since 2006.

陇南师范高等专科学校校级科研项目( 2014LSZK02007)