The distribution of and factors influencing the vegetation in a gully in the Dry-hot Valley of southwest China
文献类型：期刊论文
| 作者 | Dong, Yifan1 ; Xiong, Donghong1; Su, Zheng'an1; Li, Jiajia2; Yang, Dan1; Shi, Liangtao3; Liu, Gangcai1
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| 刊名 | CATENA
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| 出版日期 | 2014-05-01 |
| 卷号 | 116页码:60-67 |
| ISSN号 | 0341-8162 |
| 关键词 | Gully Vegetation Soil Topography Dry-hot Valley |
| 通讯作者 | Xiong, Donghong |
| 英文摘要 | The 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. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine |
| 类目[WOS] | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| 研究领域[WOS] | Geology ; Agriculture ; Water Resources |
| 关键词[WOS] | SOIL CRACKS ; EROSION ; REGION ; TOPOGRAPHY ; SLOPE ; MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332356200006 |
| 公开日期 | 2014-10-17 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/7342]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
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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