水土保持研究2011，Vol.18Issue(5)：156-160,5.
西宁市降水量特征及变化趋势分析
Analysis on the Characteristic and Change Trend of Precipitation in Xi＇ning City
摘要
Abstract
Precipitation is the main source of water resources in Xi＇ning City and study on the time series variation plays an important role in the rational development and utilization of their water resources.This paper selects 1960-2005 daily precipitation data of weather stations including Xi＇ning station,Datong Station,Huangzhong station and Huangyuan station by using moving average value,linear trend rate law and M-K rank correlation method to explore the characteristics of Xi＇ning City mutation of precipitation,and the future trend of precipitation was predicted by means of generating function model.The results showed that in Xi＇ning City,uneven distribution of rainfall during the years,mainly occurs from May to September,which accounted for about 80% of annual precipitation;annual precipitation did not change significantly and Cv values of the annual precipitation of 4 stations were between 0.15～0.20;precipitation abundant dry change exists obvious age border change;the changes in rainfall trend all did not reach 90%,95% and 99% significant level.Looking at the statistics from the annual trend,only Xi＇ning station＇s rainfall remarkablely reached to 99% of the confidence level and annual precipitation slightly increased;annual precipitation did not mutate;precipitation will increase in the coming ten years.关键词
降水量/变化趋势/突变/西宁市Key words
precipitation/change trend/mutation/Xi＇ning City分类
天文与地球科学引用本文复制引用
王颖华,张鑫..西宁市降水量特征及变化趋势分析[J].水土保持研究,2011,18(5):156-160,5.基金项目
国家“863”计划项目 （）
“十一五”国家科技支撑计划项目 （）
西北农林科技大学博士科研启动基金 （）
西北农林科技大学科研专项 （）
