摘要
根据金沙江流域1956~2014共59年的降水、径流资料系列,采用线性回归趋势分析、Mann-Kendall检验、Spearman秩次相关检验、Kendall秩次相关检验方法对此进行趋势检验,结果表明流域:(1)降水系列呈减小趋势,平均线性递减率为-0.0278mm/a,但减小趋势并不显著;(2)径流深系列呈下降趋势,平均线性递减率为-0.2655mm/a,但下降趋势不显著;(3)径流系数系列基本没有变化,平均线性递减率为-0.0004mm/a。
Based on the annual precipitation and runoff on the Jinshajiang basin from 1956~2014,the change trend of them was statistically analysed using linear regression analysis,Mann-Kendall and Spearman rank correlation test,and moving average method.The results show that:(1)The annual precipitation showed a weak trend of decline with a climate tendency of-0.0278mm/(a);(2)The annual runoff showed a weak trend of decline with a climate tendency of-0.2655mm/(a);(3)The annual runoff coefficient showed a weak trend of rise with a climate tendency of-0.0004/(a).
出处
《杨凌职业技术学院学报》
2016年第4期15-18,共4页
Journal of Yangling Vocational & Technical College
基金
长江工程职业技术学院科学研究基金项目"金沙江流域降水径流趋势分析及应用"(JKY2015-01)
关键词
金沙江流域
降水
径流
趋势分析
Jinshajiang basin
precipitation
runoff
change analysis