[1]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.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 02
Page number:
139-144
Column:
Public date:
2022-03-20
- Title:
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Variation Characteristics of Runoff in the Upper Reaches of Beiluo River Based on R/S and Morlet Wavelet Analysis
- Author(s):
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XIE Zhibo1, MU Xingmin1,2, GAO Peng1,2,3, QIU Dexun2,3
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(1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation CAS & MWR, Yangling, Shaanxi 712100, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China)
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- Keywords:
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Beiluo River; runoff; R/S analysis; Morlet wavelet
- CLC:
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P333.1
- DOI:
-
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- Abstract:
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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.