干旱区生态环境知识资源中心(Arid): Assessment of underground soil loss via the tapering grikes on limestone hillslopes

Arid

DOI	10.1016/j.agee.2020.106935
	Assessment of underground soil loss via the tapering grikes on limestone hillslopes
	Feng, Teng; Chen, Hongsong; Wang, Kelin; Nie, Yunpeng; Zhang, Xinbao; Mo, Hongwei
通讯作者	Chen, HS
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2020
卷号	297
英文摘要	Determining the mechanism of rocky desertification by investigating the sediment transport process in carbonate aquifers with the great mixture of various karst conduit features presents severe difficulties. This study put its focus on the overlying soil entering the master small-scale surface karst negative (SSKN) feature, the tapering grike on limestone hillslopes. The objective is to assess the primary forms and the annual rates of underground soil loss relative to the crown cross-section of the grikes wall. The tapering grikes were differentiated into the fully and partially filled ones based on the current filling status of the soil. Through the analysis of the possible scenarios, the stable carbon isotope and Cs-137 records of soil in the sample grikes in Southwest China, the underground soil loss form was mainly inferred as the downward creeping of overlying soil mass via the fully filled one, and the deposition of eroded overlying soils into the partially filled grike. The formula of inside space forming rate determined by the bedrock dissolution rate and the grike shape, was proposed for obtaining the current potential annual underground soil loss rate via the fully filled grike, the calculation result of which for the sample was 275.2 t km(-2) y(-1). The Cs-137 identification method of the sediment deposition depth was used to estimate the average annual underground soil loss rate since 1963 via the partially filled grike, which was 3094.4 t km(-2) y(-1) for the sample. The calculations indicated that the underground soil loss via the tapering grikes contributed a lot to the overlying soil reduction in the process of karst rocky desertification. More attentions should be given to assess the underground soil loss via all the SSKN features on the whole hillslope scale and evaluate the impacts of human activities.
英文关键词	underground soil loss tapering limestone grikes quantitative estimation tracer technique bedrock dissolution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000530645900002
WOS关键词	SEDIMENT TRANSPORT ; KARST CATCHMENT ; CARBON ISOTOPES ; VARIABILITY ; GUANGXI ; SLOPES ; RUNOFF ; RATES ; MODEL
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324405
作者单位	[Feng, Teng; Mo, Hongwei] Hunan Univ Sci & Technol, Sch Resource Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China; [Feng, Teng; Chen, Hongsong; Wang, Kelin; Nie, Yunpeng] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China; [Feng, Teng; Chen, Hongsong; Wang, Kelin; Nie, Yunpeng] Chinese Acad Sci, Huanjiang Observat & Res Stn Karst Ecosyst, Huanjiang 547100, Guangxi, Peoples R China; [Zhang, Xinbao] Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Feng, Teng,Chen, Hongsong,Wang, Kelin,et al. Assessment of underground soil loss via the tapering grikes on limestone hillslopes[J],2020,297.
APA	Feng, Teng,Chen, Hongsong,Wang, Kelin,Nie, Yunpeng,Zhang, Xinbao,&Mo, Hongwei.(2020).Assessment of underground soil loss via the tapering grikes on limestone hillslopes.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,297.
MLA	Feng, Teng,et al."Assessment of underground soil loss via the tapering grikes on limestone hillslopes".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 297(2020).