Check dam infilling archives elucidate historical sedimentary dynamics in a semiarid landscape of the Loess Plateau, China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Check dam infilling archives elucidate historical sedimentary dynamics in a semiarid landscape of the Loess Plateau, China
	Wang, Yafeng; Fu, Bojie; Wang, Shuai; Tang, Qiang; Gao, Guangyao
刊名	ECOLOGICAL ENGINEERING
	2018-08-01
卷号	118 页码:161-170
关键词	Sedimentary dynamics Stratigraphy differentiation Sediment chronology Ecological restoration Check dam Loess Plateau
ISSN号	0925-8574
文献子类	Article
英文摘要	The Loess Plateau in China exhibited high magnitudes of soil erosion, where multiple soil conservation schemes have been implemented over the past decades. Understanding the efficacy and rationality of conservation practices on erosion mitigation is critical for contemporary strategy adjustment, which currently is hampered by the unavailability of historical observations on sediment yields at most ungauged catchments. Check dams were built with the primary purpose of sediment retention, while the infilling archives register historical sedimentary dynamics. A 485-cm long sediment core was extracted from a check dam in a restored agricultural catchment in the hilly Loess Plateau. Sedimentary stratigraphy was defined at 5-cm resolutions by continuous equivalent sectioning, and differentiated according to absolute grain-size composition and Cesium-137 (Cs-137) profile. Discernable stratigraphic laminations, featured by a fine-grained layer overlying on a coarse-grained layer, were observed, which were conducted by particle selectivity associated with soil detachment and sediment transport processes. Erosion and sediment dynamics across this semiarid landscape is strictly defined by extreme summer storms with large magnitude, low frequency and short duration. Sediment chronology was determined by ascribing the identified laminations to historical storm events. We found that the core profile showed evidence of at least 11 depositional events, which finally were connected with 11 major storms over the time period 1981-1983. We concluded that integrating stratigraphy differentiation of equivalent core segments along depositional profiles with storm records is diagnostic for inferring historical sedimentary dynamics.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40493]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Yafeng,Fu, Bojie,Wang, Shuai,et al. Check dam infilling archives elucidate historical sedimentary dynamics in a semiarid landscape of the Loess Plateau, China[J]. ECOLOGICAL ENGINEERING,2018,118:161-170.
APA	Wang, Yafeng,Fu, Bojie,Wang, Shuai,Tang, Qiang,&Gao, Guangyao.(2018).Check dam infilling archives elucidate historical sedimentary dynamics in a semiarid landscape of the Loess Plateau, China.ECOLOGICAL ENGINEERING,118,161-170.
MLA	Wang, Yafeng,et al."Check dam infilling archives elucidate historical sedimentary dynamics in a semiarid landscape of the Loess Plateau, China".ECOLOGICAL ENGINEERING 118(2018):161-170.