气候变化领域集成服务门户(CCPortal): Multifrequency Downstream Hydraulic Geometry of Alluvial Mountain Rivers Located on the Qinghai-Tibet Plateau

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DOI	10.3390/w15112139
	Multifrequency Downstream Hydraulic Geometry of Alluvial Mountain Rivers Located on the Qinghai-Tibet Plateau
	Qin, Chao; Wu, Baosheng; Xue, Yuan; Fu, Xudong; Wang, Guangqian; Wang, Ge
发表日期	2023
EISSN	2073-4441
卷号	15 期号:11
英文摘要	Downstream hydraulic geometry (DHG) for multiple discharge frequencies remains poorly investigated. This paper seeks to clarify the DHG relations of different discharge frequencies and proposes the definition, mathematical expression, and geomorphological interpretation of multifrequency DHG (MFDHG). It also verifies the existence of DHG and MFDHG in the six major exoreic rivers located in the Qinghai-Tibet Plateau. MFDHG can be depicted with (1) log-linear plots between DHG coefficients and exponents for multiple discharge frequencies and (2) independent DHG curves intersecting near congruent discharge, width, depth, or velocity. The results show that rivers in the study area exhibit strong DHG relations. The variations in the DHG coefficients and exponents usually exhibit opposite trends with increasing discharge frequency. The MFDHG of a river reach is generally stronger than that of a river basin. Congruent hydraulics, as indices of geometric variability and hydraulic self-similarity, reflect consistent changes in hydraulic variables downstream. MFDHG is a novel geomorphic phenomenon that bridges spatiotemporal dimensions in HG systems and provides a basis for establishing an overall HG relationship.
关键词	multifrequency downstream hydraulic geometry MFDHG discharge frequency river network Qinghai-Tibet Plateau
英文关键词	AT-A-STATION; BANKFULL DISCHARGE; CHANNEL GEOMETRY; STREAMS; WIDTH; MORPHOLOGY
WOS研究方向	Environmental Sciences ; Water Resources
WOS记录号	WOS:001004475500001
来源期刊	WATER
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282722
作者单位	Tsinghua University; Tsinghua University; Tsinghua University
推荐引用方式 GB/T 7714	Qin, Chao,Wu, Baosheng,Xue, Yuan,et al. Multifrequency Downstream Hydraulic Geometry of Alluvial Mountain Rivers Located on the Qinghai-Tibet Plateau[J],2023,15(11).
APA	Qin, Chao,Wu, Baosheng,Xue, Yuan,Fu, Xudong,Wang, Guangqian,&Wang, Ge.(2023).Multifrequency Downstream Hydraulic Geometry of Alluvial Mountain Rivers Located on the Qinghai-Tibet Plateau.WATER,15(11).
MLA	Qin, Chao,et al."Multifrequency Downstream Hydraulic Geometry of Alluvial Mountain Rivers Located on the Qinghai-Tibet Plateau".WATER 15.11(2023).