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

文献类型：期刊论文

作者Zhang, Yunqi2; Long, Yi4; Zhang, Xinbao4; Pei, Zengli2; Lu, Xue2; Wu, Zhehong2; Xu, Mingyang2; Yang, Haiquan3; Cheng, Peng1
刊名GEODERMA
出版日期2020-04-01
卷号363页码:114168
ISSN号0016-7061
关键词Karst depression Sedimentation rate Specific sediment yield Huguang to Sichuan migration Charcoal fragment
DOI10.1016/j.geoderma.2019.114168
通讯作者Long, Yi(longyi@imde.ac.cn)
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
WOS关键词3 GORGES RESERVOIR ; ROCKY DESERTIFICATION ; FALLOUT RADIONUCLIDES ; LAKE-SEDIMENTS ; SOIL-EROSION ; LAND-USE ; RADIOCARBON ; REGION ; RIVER ; CHRONOLOGIES
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
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 Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710000, Peoples R China
2.Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Peoples R China;
3.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China;
4.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, Chengdu 610041, 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.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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