Check dam infilling archives elucidate historical sedimentary dynamics in a semiarid landscape of the Loess Plateau, China
Tang, Qiang1,2; Wang, Shuai3; Fu, Bojie2,3; Wang, Yafeng2; Gao, Guangyao2
2018-08-01
发表期刊ECOLOGICAL ENGINEERING
ISSN0925-8574
卷号118页码:161-170
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.
关键词Sedimentary dynamics Stratigraphy differentiation Sediment chronology Ecological restoration Check dam Loess Plateau
DOI10.1016/j.ecoleng.2018.05.004
关键词[WOS]YELLOW-RIVER BASIN ; SOIL-EROSION ; CARBON SEQUESTRATION ; ECOSYSTEM SERVICES ; NORTHERN SHAANXI ; DELIVERY PROBLEM ; FLOW REGULATION ; WORLDS RIVERS ; HILLY AREA ; LAND-USE
语种英语
资助项目National Natural Science Foundation of China[41501284] ; National Natural Science Foundation of China[41390464] ; China Postdoctoral Science Foundation[2015M571138] ; UK Royal Society Newton International Fellowship[NF161415]
WOS研究方向Environmental Sciences & Ecology ; Engineering
WOS类目Ecology ; Engineering, Environmental ; Environmental Sciences
WOS记录号WOS:000432518800018
项目资助者National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; UK Royal Society Newton International Fellowship
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.imde.ac.cn/handle/131551/21469
专题山地表生过程与生态调控重点实验室
通讯作者Fu, Bojie
作者单位1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource, Beijing 100875, Peoples R China
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Tang, Qiang,Wang, Shuai,Fu, Bojie,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 Tang, Qiang,Wang, Shuai,Fu, Bojie,Wang, Yafeng,&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 Tang, Qiang,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.
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