Temporal changes in suspended sediment transport during the past five decades in a mountainous catchment, eastern China

doi:10.1007/s11368-019-02363-x

	Temporal changes in suspended sediment transport during the past five decades in a mountainous catchment, eastern China
	Fang, Haiyan 1,2
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2019-12-01
卷号	19 期号:12 页码:4073-4085
关键词	Hysteresis loop Mountainous catchment Multiple time scales Sediment dynamics
ISSN号	1439-0108
DOI	10.1007/s11368-019-02363-x
通讯作者	Fang, Haiyan(fanghy@igsnrr.ac.cn)
英文摘要	Purpose Analysis of sediment transport is an effective approach for identifying sediment sources and for catchment management. However, a long-term analysis of sediment variability at multiple time scales is less available, especially in mountainous catchments. This study aims to determine sediment sources and to identify sediment transport dynamics, as well as the influencing factors, through analyzing long-term sediment fluxes at different time scales. Materials and methods In this paper, 32 years of sediment flux in an instrumented mountainous catchment in eastern Zhenjiang Province, China, was investigated at multiple time scales (i.e., monthly, seasonal, annual, and event). Sediment yields (SYs) during three time periods (i.e., 1964-1977, 1978-1989, and 2010-2015) were first classified by the Mann-Kendall and cumulative anomaly tests, and then sediment fluxes for each period were investigated and compared at multiple time scales. Results and discussion Annual SYs ranged from 29 to 308 t year(-1) during the recording period and were significantly influenced by several high magnitude flood events. The mean annual SYs decreased from 153.82 t year(-1) in 1964-1977, to 97.79 t year(-1) in 1978-1989, and to 91.08 t year(-1) in 2010-2015 due to improved soil conservation measures and increased reservoirs. At the seasonal scale, over 92% of the sediment was transported in spring and summer over the recording period. Heterogeneous sediment sources, partial areal distribution of rainfalls, and other factors led to complex suspended sediment concentration versus water discharge hysteresis loop patterns at the event and monthly scales. Conclusions The improved soil conservation measures and increased reservoirs over the recent decades decreased sediment availability, and the number and the magnitude of flood events from 1964 onward. However, the flood sediment fluxes in a few months were still high due to extreme precipitation events in recent years. The work can provide guidance for addressing sediment problems in this and/or other similar catchments.
资助项目	National Natural Science Foundation of China[41571271]
WOS关键词	CHANGJIANG YANGTZE RIVER ; HILLY LOESS REGION ; YELLOW-RIVER ; WATER DISCHARGE ; SPATIAL SCALE ; RATING CURVES ; SOIL-EROSION ; TIME SCALES ; DYNAMICS ; BASIN
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000505160200018
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/131012]
专题	中国科学院地理科学与资源研究所
通讯作者	Fang, Haiyan
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fang, Haiyan. Temporal changes in suspended sediment transport during the past five decades in a mountainous catchment, eastern China[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(12):4073-4085.
APA	Fang, Haiyan.(2019).Temporal changes in suspended sediment transport during the past five decades in a mountainous catchment, eastern China.JOURNAL OF SOILS AND SEDIMENTS,19(12),4073-4085.
MLA	Fang, Haiyan."Temporal changes in suspended sediment transport during the past five decades in a mountainous catchment, eastern China".JOURNAL OF SOILS AND SEDIMENTS 19.12(2019):4073-4085.