REN Zongping,XIE Mengyao,MA Yongyong,et al.Periodic Characteristics of Streamflow and Sediment Discharge in Wulanmulun River from 1960 to 2015[J].Research of Soil and Water Conservation,2018,25(06):74-78,93.
乌兰木伦河1960-2015年水沙周期性分析
- Title:
- Periodic Characteristics of Streamflow and Sediment Discharge in Wulanmulun River from 1960 to 2015
- Keywords:
- streamflow; sediment discharge; abrupt change point; Wulanmulun River
- 分类号:
- P333.5
- 摘要:
- 采用Mann-Kendall检验、Pettitt检验以及小波周期分析等方法对乌兰木伦河流域王道恒塔站1960—2015年的降水、径流和输沙过程进行了分析。结果表明：乌兰木伦河流域降水量变化趋势不显著（Z=1.19），在2010年之后有增加趋势。Mann-Kendall检验结果表明年径流量（Z=-5.62）和年输沙量有显著减沙趋势（Z=-5.56），采用Pettitt检验结果表明年径流量和年输沙量突变点均发生在1996年。相比60年代，2010年之后径流量从2.5亿m3减少到0.9亿m3，输沙量也从2 965.1万t减少到1.5万t。年降水量周期与年径流年输沙的周期不同步，仅在2～4 a和8～10 a时间尺度上具有周期性同步，而径流量和输沙量的周期有一定的同步性。研究表明，流域径流量和输沙量的短周期变化主要受降雨、太阳活动等自然因子调控，同时受到人类活动的影响，而更长周期的水沙变化特征则有赖于百年以上的水文序列。
- Abstract:
- This study analyzes the variability of annual precipitation, streamflow and sediment discharge in Wulanmulun River. The Mann-Kendall test, Pettitt’s test and wavelet analysis were applied to analyze the trends of the streamflow and sediment discharge in the Wulanmulun River from 1960 to 2015. The results showed that both the abrupt change points of streamflow and sediment discharge appeared in 1996. There was no significant change in precipitation (Z=1.19), and was a slight increase after 2010. Reductions of both streamflow (Z=-5.62) and sediment discharge (Z=-5.56) were found. The streamflow decreased from 250 million m3 to 90 million m3, the sediment discharge also decreased from the 29 651 thousand tons to 15 thousand tons. The main cycle of the annual streamflow was different from that of the annual precipitation, only the similar cycle occurred at 2～4 years and 8～10 years, and the annual streamflow and the sediment discharge had the similar cycle. The research result showed that the short cycle of the streamflow and sediment discharge was controlled by the natural factors including precipitation and solar activity, and also affected by human activity; long cycle characteristics relied on the more than hundred years of hydrological sequence.
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备注/Memo
收稿日期:2018-02-12;改回日期:2018-03-27。
基金项目:国家重点研发计划项目“鄂尔多斯高原砒砂岩区生态综合治理技术”子课题“砒砂岩区多动力复合侵蚀时空分异规律”（2017YFC0504501）
作者简介:任宗萍(1982-),女,山东潍坊人,博士,讲师,主要从事流域水沙过程研究。E-mail:renzongping@163.com
通讯作者:李鹏(1974-),男,山东烟台人,博士,教授,主要从事水土资源与环境研究。E-mail:lipeng74@163.com