气候变化领域集成服务门户(CCPortal): Hybrid method for assessing the multi-scale periodic characteristics of the precipitation–runoff relationship: A case study in the weihe river Basin; China

CCPortal

DOI	10.2166/wcc.2016.003
	Hybrid method for assessing the multi-scale periodic characteristics of the precipitation–runoff relationship: A case study in the weihe river Basin; China
	Guo A.; Chang J.; Huang Q.; Wang Y.; Liu D.; Li Y.; Tian T.
发表日期	2017
ISSN	20402244
起始页码	62
结束页码	77
卷号	8 期号:1
英文摘要	Fully elucidating the precipitation–runoff relationship (PRR) is of great significance for better water resources planning and management and understanding hydrological cycle processes. For investigating the multi-scale PRR variability in the Weihe River basin in 1960–2010, a new hybrid method is proposed in which ensemble empirical mode decomposition (EEMD) and cross wavelet transform and wavelet transform coherence are used in combination. With the application of mutual information entropy, monthly precipitation and runoff are decomposed into two parts: high- (HFC) and low-frequency components (LFC). The results show that HFCs are characterized by inter- and intra-annual variations in precipitation and runoff, whereas LFCs display approximately two-year periodicity and contain abundant abnormal information of the raw data. Therefore, the PRR between HFCs exhibited significant correlations at the 95% confidence level over the whole time period. However, the correlations of the PRR between LFCs are not significant for many of the time-frequency domains. Additionally, the phase relations are disordered in these time-frequency domains, and no certain trend in phase angle variations can be identified. Through comparative analysis of the anthropogenic activities and climatic events with PRR variations, it can be concluded that the hybrid method can efficiently capture the PRR in various time-frequency domains. © IWA Publishing 2017.
英文关键词	Cross wavelet transform; Ensemble empirical mode decomposition; Hydrologic time series analysis; Multi-time scale variability; Precipitation–runoff relationship; Wavelet transform coherence
语种	英语
scopus关键词	Electric frequency control; Fluorocarbons; Runoff; Time series analysis; Water resources; Watersheds; Wavelet decomposition; Cross-wavelet transform; Ensemble empirical mode decomposition; Ensemble empirical mode decompositions (EEMD); Hydrologic time series; Low-frequency components; Multi-time scale; Precipitation and runoff; Water resources planning and managements; Wavelet transforms; correlation; hydrological cycle; periodicity; precipitation intensity; rainfall-runoff modeling; temporal variation; time series analysis; China; Wei Basin
来源期刊	Journal of Water and Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148117
作者单位	State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an, 710048, China
推荐引用方式 GB/T 7714	Guo A.,Chang J.,Huang Q.,等. Hybrid method for assessing the multi-scale periodic characteristics of the precipitation–runoff relationship: A case study in the weihe river Basin; China[J],2017,8(1).
APA	Guo A..,Chang J..,Huang Q..,Wang Y..,Liu D..,...&Tian T..(2017).Hybrid method for assessing the multi-scale periodic characteristics of the precipitation–runoff relationship: A case study in the weihe river Basin; China.Journal of Water and Climate Change,8(1).
MLA	Guo A.,et al."Hybrid method for assessing the multi-scale periodic characteristics of the precipitation–runoff relationship: A case study in the weihe river Basin; China".Journal of Water and Climate Change 8.1(2017).