IGSNRR OpenIR
Sediment yield on a devastated hill in southern China: effects of microbiotic crust on surface erosion process
Uchida, T; Ohte, N; Kimoto, A; Mizuyama, T; Li, CH
2000-02-01
Source PublicationGEOMORPHOLOGY
Volume32Issue:1-2Pages:129-145
AbstractIn southern China, most of the forests consist of Pinus massoniana, but they are usually poor, thin, and deteriorated due to human intervention such as cutting, removal of litter for fuel and over-grazing. Therefore, exposed bare soil is found in many devastated hills. As a consequence, both the direct runoff percentage and the sediment yield are very high. In order to understand the surface erosion processes in this environment, we measured sediment yield and surface erosion depth in terms of catchment scale, and carried out in situ sprinkling experiments, focusing on the spatial variability of surface conditions and sediment sources. The results of sediment yield measurements at the end of headwater catchment suggest the following characteristic. (1) The surface water is capable of transporting more material than is supplied by detachment. That is, the sediment discharge process is detachment-limited. In situ sprinkling experiments indicate that: (2) In the lower part of the hillslope where the surface is covered by microbiotic crust, the ratio of surface runoff to rainfall is high, but sediment yield is small. (3) In the upper part of the hillslope where there is no microbiotic crust, the ratio of surface runoff to rainfall is low, but sediment yield is large. Measurements of surface erosion depths indicate that: (4) Microbiotic crusts provide a high degree of protection against soil erosion, even though the surface runoff ratio is large at the lower hillslope. Consequently, the surface erosion depth is almost zero at the lower part of hillslope. (5) The main source of sediment was the upper part of hillslope. Based on these indications, it can be concluded that when the sediment discharge process is detachment-limited, the effect of the surface crust and/or the vegetation cover on the sediment discharge process is great. That is, the spatial variation of the surface crust and/or the vegetation cover controls the source of sediment. (C) 2000 Elsevier Science B.V. All rights reserved.
SubtypeArticle
KeywordSediment Yield Devastated Hill Microbiotic Crust South China Catchment Scale Sediment Source
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedPhysical Geography ; Geology
WOS KeywordSOIL-EROSION ; CRYPTOGAMIC CRUST ; WESTERN-NEGEV ; RUNOFF ; SPAIN ; AREAS ; INFILTRATION ; CATCHMENT ; ISRAEL ; RATES
Indexed BySCI
Language英语
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000086087900008
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68262
Collection中国科学院地理科学与资源研究所
Corresponding AuthorUchida, T
Affiliation1.Kyoto Univ, Grad Sch Agr, Dept Forestry, Lab Eros Control, Kyoto 6068502, Japan
2.Kyoto Univ, Grad Sch Agr, Div Environm Sci & Technol, Kyoto 6068502, Japan
3.SABO Engn, Kawagoe, Saitama 3501122, Japan
4.Chinese Acad Sci, Commiss Integrated Survey Nat Resources, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Uchida, T,Ohte, N,Kimoto, A,et al. Sediment yield on a devastated hill in southern China: effects of microbiotic crust on surface erosion process[J]. GEOMORPHOLOGY,2000,32(1-2):129-145.
APA Uchida, T,Ohte, N,Kimoto, A,Mizuyama, T,&Li, CH.(2000).Sediment yield on a devastated hill in southern China: effects of microbiotic crust on surface erosion process.GEOMORPHOLOGY,32(1-2),129-145.
MLA Uchida, T,et al."Sediment yield on a devastated hill in southern China: effects of microbiotic crust on surface erosion process".GEOMORPHOLOGY 32.1-2(2000):129-145.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Uchida, T]'s Articles
[Ohte, N]'s Articles
[Kimoto, A]'s Articles
Baidu academic
Similar articles in Baidu academic
[Uchida, T]'s Articles
[Ohte, N]'s Articles
[Kimoto, A]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Uchida, T]'s Articles
[Ohte, N]'s Articles
[Kimoto, A]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.