Analysis of the Change Trend and Cycle
Statistics of Runoff in the Upstream of Hanjiang River
Abstract: Continuous dry of the Hanjiang basin during 1990s has aroused concerns about security of the middle route project of south to north water diversion project. As a result, it is very important to analyze the change trend and cycle statistics of runoff series in the upstream of Hanjiang. Mann- Kendall, Spearman and Linear regression analyses were used to analyze the change trend of runoff series. It is shown that on the level of significance of 0.05, the runoff and precipitation trends were not significant. Wavelet analysis was used to analyze the cycle statistics. The result shows that runoff series has 7 to 10, and 20 to 25 years of the time scale of the cyclical change rule. Research shows that the generation of continuous dry years in the Hanjiang basin is mainly due to a decrease of precipitation, and that runoff is in periodic variation during low water period.
文章引用: 张洪刚 , 刘 攀 , 李 响 , 周 捷 , 陈 华 (2014) 汉江上游径流量变化趋势与周期统计分析。 水资源研究， 3， 419-428. doi: 10.12677/JWRR.2014.35051
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