Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (8): 217-222.doi: 10.11924/j.issn.1000-6850.2013-1432

• 23 • Previous Articles     Next Articles

Analysis of Characteristics of Precipitation Changes About 53 Years in Qingyang, Gansu Province

  

  • Received:2013-05-21 Revised:2013-06-14 Online:2014-03-15 Published:2014-03-15

Abstract: In order to reveal precipitation characteristics and server for agro-meteorology, the author used precipitation data from 1960 to 2012 in Huanxian, Qingcheng and Xifeng County of Qingyang City in Gansu Province, used the coefficient of variation, changing trend, the cumulative anomaly and T test for analysis. The result showed that: the precipitation variable rate was large and the precipitation decreased in Qingyang City, the annual precipitation decrease was mainly caused by the spring and autumn decrease in precipitation. It had mutation characteristics. The mutation point of Huanxian and Qingcheng was in 1968, Xifeng’s was in 2001. Tended to decrease due to precipitation, had a negative impact on agriculture, forestry, animal husbandry production. Meanwhile, due to the large variability of precipitation, most of the year was drought and flood pressure.