| 王建莹,王双银,杨会龙,朱小林.石头河流域降雨径流变化特性研究[J].干旱地区农业研究,2011,29(6):179~183 |
| 石头河流域降雨径流变化特性研究 |
| Study on characteristics of precipitation and runoff changes in the Shitouhe watershed |
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| DOI：10.7606/j.issn.1000-7601.2011.06.33 |
| 中文关键词: 降雨 径流 Mann-Kendall检验 谱分析 不均匀系数 集中期 石头河流域 |
| 英文关键词:precipitation runoff Mann-Kendall test analysis of spectrum non-uniformity coefficient concentra-
tion period Shitouhe watershed |
| 基金项目:西北农林科技大学基本科研业务费专项资金(QN2009088) |
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| 中文摘要: |
| 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年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年左右和1995年左右发生突变;年降水和年径流系列均有3 a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。 |
| 英文摘要: |
| Studying characteristics of precipitation and runoff changes could offer a scientific support for planning
and using water resources more resonable. 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. |
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