摘要
采用Mann—Kendall检验和谱分析方法分析了石头河流域1954~2007年降水系列和1950。2008年的径流系列年际变化特性,采用不均匀系数和集中期等特征参数对降雨径流系列的午内分配特征进行了研究。结果表明:1950年以来石头河流域年降水和年径流系列均有显著下降趋势;年降水系列在1979年和1990年左右发生突变,而年径流系列则在1969午左右和1995年左右发生突变;年降水和午径流系列均有3a的主周期,对不均匀系数系列和集中期系列的研究也得到了同样的结论。
Studying characteristics of and using water resources more resonable. precipitation and runoff changes could offer a scientific support for planning Mann-Kendall test and analysis of spectrum are used to study the characteris
tics of precipitation from 1954 - 2007 and runoff series from 1950 ~ 2008 in Shitouhe watershed. The annual distribution of precipitation and runoff is analyzed with non-uniformity coefficient and concentration period. The results show that: the annual precipitation and runoff declines significantly; the aberrance points of precipitation appear in 1979 and 1990, while the annual runoff aberrance points in 1969 and 1995; the precipitation and runoff have the main cycle of about 3 years, and the study on non-uniformity coefficient and concentration period got the same conclusion.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第6期179-183,共5页
Agricultural Research in the Arid Areas
基金
西北农林科技大学基本科研业务费专项资金(QN2009088)
关键词
降雨
径流
Mann—Kendall检验
谱分析
不均匀系数
集中期
石头河流域
precipitation
runoff
Mann-Kendall test
analysis of spectrum
non-uniformity coefficient
concentration period
Shitouhe watershed