Using depression deposits to reconstruct human impact on sediment yields from a small karst catchment over the past 600 years

doi:10.1016/j.geoderma.2019.114168

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Using depression deposits to reconstruct human impact on sediment yields from a small karst catchment over the past 600 years
	Zhang, Yunqi 3; Long, Yi 2; Zhang, Xinbao 2; Pei, Zengli 3; Lu, Xue 3; Wu, Zhehong 3; Xu, Mingyang 3; Yang, Haiquan 1; Cheng, Peng 4
刊名	GEODERMA
	2020-04-01
卷号	363 页码:114168
关键词	Karst depression Sedimentation rate Specific sediment yield Huguang to Sichuan migration Charcoal fragment
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2019.114168
产权排序	2
文献子类	Article
英文摘要	Assessment of long-term human impact on sediment yields from karst settings can improve our understanding of the pattern of soil erosion causing rocky desertification in the historical context of environmental change influenced by human activity. Few previous investigations have estimated this impact over time-scales longer than 50 years. This study used dated depression deposits to reconstruct human impact on sediment yields from a small karst catchment in the Three Gorges Reservoir Region, China, over the past 600 years. Cs-137, Pb-210(ex), and C-14 techniques were used to determine short-term (similar to 50 yr), medium-term (similar to 100 yr), and long-term (similar to 600 yr) sedimentation in the karst depression, respectively. Sedimentation rates and specific sediment yields in the catchment during six distinct stages (1351-1462, 1463-1701, 1702-1809, 1810-1916, 1917-1962, and 1963-2017) were determined from core samples. The results indicate that soil loss during the period 1351-1962 was more intensive than that since 1963, which reveals changing sediment yields impacted by human activity over the past 600 years. The high values during the three stages before 1810 can be attributed to the impacts of large-scale migration of people from Huguang to Sichuan during the Ming and Qing dynasties; the higher values during 1810-1916 might reflect increasing disturbance related to rapid population expansion; the highest values (1917-1962) were caused by large-scale deforestation in 1958 and a consistently increasing population; and low values since 1963 reflect constraints on the supply of sediment source materials. These results suggest that rocky desertification might be a long-term land-surface process induced by human activity over timescales of > 100 years rather than a short-term modern process occurring over a number of decades. This is the first attempt to examine the long-term history of human impact on sediment yields from a karat catchment using depression deposits. This work improves our understanding of the influence of human activities on soil loss at a depression-catchment scale, and of the evolution and dynamics of rocky desertification in karst areas.
电子版国际标准刊号	1872-6259
资助项目	National Key Research Program of China[2016YFC0502301] ; National Natural Sciences Foundation of China[41671277] ; National Natural Sciences Foundation of China[41873025]
WOS关键词	3 GORGES RESERVOIR ; ROCKY DESERTIFICATION ; FALLOUT RADIONUCLIDES ; LAKE-SEDIMENTS ; SOIL-EROSION ; LAND-USE ; RADIOCARBON ; REGION ; RIVER ; CHRONOLOGIES
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000515198500040
资助机构	National Key Research Program of China ; National Natural Sciences Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34035]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Long, Yi
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Peoples R China; 3.Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Peoples R China; 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yunqi,Long, Yi,Zhang, Xinbao,et al. Using depression deposits to reconstruct human impact on sediment yields from a small karst catchment over the past 600 years[J]. GEODERMA,2020,363:114168.
APA	Zhang, Yunqi.,Long, Yi.,Zhang, Xinbao.,Pei, Zengli.,Lu, Xue.,...&Cheng, Peng.(2020).Using depression deposits to reconstruct human impact on sediment yields from a small karst catchment over the past 600 years.GEODERMA,363,114168.
MLA	Zhang, Yunqi,et al."Using depression deposits to reconstruct human impact on sediment yields from a small karst catchment over the past 600 years".GEODERMA 363(2020):114168.