气候变化领域集成服务门户(CCPortal): Coincidence probability analysis of hydrologic low-flow under the changing environment in the Wei River Basin

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DOI	10.1007/s11069-020-04051-3
	Coincidence probability analysis of hydrologic low-flow under the changing environment in the Wei River Basin
	Yang J.; Wang Y.; Yao J.; Chang J.; Xu G.; Wang X.; Hu H.
发表日期	2020
ISSN	0921030X
起始页码	1711
结束页码	1726
卷号	103 期号:2
英文摘要	Hydrologic characteristics including extreme-flow events in many rivers around the world have been altered due to the climate change and human activities. Most available research concerns about the extreme event trend, frequency and duration in a single river rather than the synchronicity or coincidence probability among different tributaries. Accurately knowing the coincidence probability of hydrologic extreme-flow events is vital for better water resources allocation and project design. Joint distribution constructed by the copulas function is a widely used method to conduct this issue. However, studies conducted by the copulas function are mostly carried out in a bivariate environment and ignore the nonstationary. These may not comprehensively reflect the hydrologic characteristics under the changing environment. This paper analyzes the related hydrologic low-flow changes considering the nonstationary under the changing environment in the Wei River Basin, China, where the climate tends to be drier. These analyses are obtained by using trivariate copulas function and Kendall’s return period method to derive the joint distribution of hydrologic low-flow in a seasonal time scale. The results mainly show that the coincidence probabilities of low-flow among three tributaries of the Wei River in four seasons after the change point are basically higher than those before the change point. It may indicate that the low-flow negative impacts in the whole Wei River Basin in four seasons may be intensified (which needs to be paid more attention) under the changing environment. © 2020, Springer Nature B.V.
关键词	Coincidence probability analysis Hydrologic low-flow Marginal distribution function Non-parametric Pettitt test Trivariate Archimedean copulas Wei River Basin
英文关键词	accuracy assessment; climate change; climate effect; environmental change; hydrological response; low flow; probability; river basin; river flow; seasonal variation; timescale; tributary; China; Wei Basin
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206020
作者单位	State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an, 710048, China; Hanjiang - to - Weihe River Water Diversion Project Construction Co. Ltd., Shaanxi Province, Xi’an, 710048, China
推荐引用方式 GB/T 7714	Yang J.,Wang Y.,Yao J.,et al. Coincidence probability analysis of hydrologic low-flow under the changing environment in the Wei River Basin[J],2020,103(2).
APA	Yang J..,Wang Y..,Yao J..,Chang J..,Xu G..,...&Hu H..(2020).Coincidence probability analysis of hydrologic low-flow under the changing environment in the Wei River Basin.Natural Hazards,103(2).
MLA	Yang J.,et al."Coincidence probability analysis of hydrologic low-flow under the changing environment in the Wei River Basin".Natural Hazards 103.2(2020).