IMHE OpenIR  > 山地灾害与地表过程重点实验室
The distribution of and factors influencing the vegetation in a gully in the Dry-hot Valley of southwest China
Dong, Yifan1; Xiong, Donghong1; Su, Zheng'an1; Li, Jiajia2; Yang, Dan1; Shi, Liangtao3; Liu, Gangcai1
Corresponding AuthorXiong, Donghong
2014
Source PublicationCATENA
ISSN0341-8162
EISSN1872-6887
Volume116Pages:60-67
SubtypeArticle
AbstractThe Dry-hot Valley of the Jinsha River in southwest China is an ecologically fragile zone in which gully erosion is one of the most important environmental problems due to the high sediment yield from the gully. The vegetation, which impacts the erosion processes of the gully, is important to the ecological environment. In this study, we investigated the vegetation in gully n1 of Yuanmou County, which is a typical area of the Dry-hot Valley. A total of 82 vegetation quadrats on a relatively gentle section of gully n1 (slope was mostly less than 45 degrees) and nine points on a steep slope (slope higher than 70 degrees) were investigated in 2012. The vegetation indices, in addition to the soil conditions and topography, were measured through field investigations and the gully Digital Elevation Model (DEM). On the gully sidewall, almost no vegetation grew in the steep slope, whereas the slope gradient and the slope aspect exhibited a weak relationship with the vegetation indices when the slope was less than 45 degrees. On the gully bed, the runoff path was the most important factor that affected the vegetation. The average vegetation cover inside the runoff path was 5.2%, whereas the average vegetation cover outside the runoff path increased to 56.3%. The vegetation strongly impacted the soil moisture during the rainy season. However, this relationship was not observed during the dry season, which indicates that the water conservation effects exerted by the vegetation cannot last a long time in the Dry-hot Valley. The active part of gully n1 has a vegetation cover (average 16.9%) that is significantly lower compared with the stable parts of the gully (55.1%). This finding indicates that the vegetation in the gully is not only impacted by the soil and the topography in the area of vegetation growth but also influenced by the runoff processes upstream of the gully heads. (C) 2013 Elsevier B.V. All rights reserved.
KeywordGully Vegetation Soil Topography Dry-hot Valley
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
DOI10.1016/j.catena.2013.12.009
WOS Subject ExtendedGeology ; Agriculture ; Water Resources
Indexed BySCI
WOS KeywordSOIL CRACKS ; EROSION ; REGION ; TOPOGRAPHY ; SLOPE ; MODEL
Language英语
Quartile3区
TOP
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000332356200006
Funding OrganizationYouth Talent Team Program of IMHE, Chinese Academy of Sciences(SDSQB-2011-01) ; National Natural Science Foundation of China(41201009) ; Knowledge Innovation Program of the Chinese Academy of Sciences(KZCXZ-EW-QN317) ; West Light Foundation of the Chinese Academy of Sciences ; Foundation of Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences ; Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences
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Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7342
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & EarthSurface Proc, Chengdu 610041, Peoples R China
2.Chengdu Univ Informat Technol, Dept Environm Engn, Chengdu 610225, Peoples R China
3.Yunnan Acad Agr Sci, Inst Trop Ecoagr Sci, Yuanmou 651300, Peoples R China
Recommended Citation
GB/T 7714
Dong, Yifan,Xiong, Donghong,Su, Zheng'an,et al. The distribution of and factors influencing the vegetation in a gully in the Dry-hot Valley of southwest China[J]. CATENA,2014,116:60-67.
APA Dong, Yifan.,Xiong, Donghong.,Su, Zheng'an.,Li, Jiajia.,Yang, Dan.,...&Liu, Gangcai.(2014).The distribution of and factors influencing the vegetation in a gully in the Dry-hot Valley of southwest China.CATENA,116,60-67.
MLA Dong, Yifan,et al."The distribution of and factors influencing the vegetation in a gully in the Dry-hot Valley of southwest China".CATENA 116(2014):60-67.
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