XIE Zhibo,MU Xingmin,GAO Peng,et al.Variation Characteristics of Runoff in the Upper Reaches of Beiluo River Based on R/S and Morlet Wavelet Analysis[J].Research of Soil and Water Conservation,2022,29(02):139-144.
基于R/S和Morlet小波分析的北洛河上游径流变化特征
- Title:
- Variation Characteristics of Runoff in the Upper Reaches of Beiluo River Based on R/S and Morlet Wavelet Analysis
- 文章编号:
- 1005-3409(2022)02-0139-06
- 关键词:
- 北洛河; 径流; R/S分析; Morlet小波变换
- Keywords:
- Beiluo River; runoff; R/S analysis; Morlet wavelet
- 分类号:
- P333.1
- 文献标志码:
- A
- 摘要:
- 为了深入探究北洛河上游长时间序列年径流量变化规律及周期特征,加强对流域水资源规划管理和可持续开发利用,基于北洛河上游吴旗水文站1971—2014年实测径流量数据,采用M-K(Mann-Kendall)趋势检验法和R/S法(rescaled range analysis)分析了全年及汛期径流量的变化趋势和持续性; 并采用Morlet小波变换对径流时间序列进行了多尺度周期特征分析。结果表明:(1)从径流量年内分配来看,1971—2014年,北洛河上游径流年内集中分布在6—9月,月最大径流量一般出现在8月,分配曲线呈“双峰型”。随着时间推移,径流量年内分配不均匀性逐渐减弱;(2)汛期径流量占年径流量的比例降低,全年和汛期的径流量变化均呈显著减少趋势(p<0.05),且未来变化趋势与过去一致的可能性很大,即减少趋势具有一定的持续性(全年和汛期径流量序列Hurst值分别为0.53,0.69);(3)北洛河上游径流量呈现出多尺度性、主周期性和同步性变化的特点。汛期和全年径流量具有相似且显著的变化周期,主要受到3,11,19 a左右3个主周期的影响。总之,北洛河上游径流量呈显著减少趋势且变化周期比较明显。
- Abstract:
- In order to deeply study the variation rule and periodic characteristics of long-term sequence annual runoff in the upper reaches of the Beiluo River and strengthen the management of water resources planning and sustainable development and utilization in the basin, the variation trends and continuity of runoff throughout the year and the flood season were analyzed by using the Mann-Kendall test and rescaled range analysis methods, and Morlet continuous wavelet transform method was applied to perform the multi-scale analysis of runoff periodic characteristic in the long time series in the upper reaches of the Beiluo River, based on the runoff data measured by Wuqi hydrological station from 1971 to 2014 in the upper reaches of the Beiluo River. The results showed that:(1)the distribution of runoff in a year concentrated from June to September from 1971 to 2014, the maximum amount of runoff occurred in August, the distribution presented a double-peak curve, moreover, with the passage of time, the non-uniformity of distribution of annual runoff gradually weakened;(2)the proportion of runoff in flood season to annual runoff decreased, the runoff variation in a year and flood season showed the significant decreasing trend(p<0.05), this trend presented a continuity to some extent(Hurst values of runoff in a year and the flood season are respectively 0.53 and 0.69), therefore, there was a high probability about the trend, which will continue in the future;(3)the runoff variation showed the characteristics of multi-scale, main periodicity and synchronization during the period of from 1971 to 2014, there was a similar and significant runoff variation period in the flood season and the whole year, including the three main periods of 3-year, 11-year and 19-year. In a word, the upstream runoff of the Beiluo River showed the significant decrease trend and the variation periods were obvious.
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备注/Memo
收稿日期:2021-01-13 修回日期:2021-03-06
资助项目:国家重点研发计划专题计划“黄土高原水土流失治理与生态产业协同发展技术集成与模式”(2016YFC0501707)
第一作者:谢智博(1997—),男,河南偃师人,在读硕士研究生,研究方向为生态水文及水土保持。E-mail:1025638702@qq.com
通信作者:高鹏(1976—),男,陕西扶风人,博士,研究员,博士生导师,主要从事生态水文及水土保持研究。E-mail:gaopeng@ms.iswc.ac.cn