您好，欢迎访问云南省农业科学院 机构知识库！

The distribution of and factors influencing the vegetation in a gully in the Dry-hot Valley of southwest China

文献类型： 外文期刊

作者： Dong, Yifan 1 ; Xiong, Donghong 1 ; Su, Zheng'an 1 ; Li, Jiajia 2 ; Yang, Dan 1 ; Shi, Liangtao 3 ; Liu, Gangcai 1 ;

作者机构： 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

关键词： Gully;Vegetation;Soil;Topography;Dry-hot Valley

期刊名称：CATENA （ 影响因子：5.198； 五年影响因子：5.594 ）

ISSN： 0341-8162

年卷期： 2014 年 116 卷

页码：

收录情况： SCI

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.

  • 相关文献

[1]Critical topographic threshold of gully erosion in Yuanmou Dry-hot Valley in Southwestern China. Dong, Yifan,Xiong, Donghong,Su, Zheng'an,Yang, Dan,Liu, Gangcai,Dong, Yifan,Xiong, Donghong,Su, Zheng'an,Yang, Dan,Liu, Gangcai,Li, Jiajia,Zhai, Juan,Lu, Xiaoning,Shi, Liangtao.

[2]Morphology and controlling factors of the longitudinal profile of gullies in the Yuanmou dry-hot valley. Ding Lin,Qin Fa-chao,Liu Hui,Zhang Bin,Shu Cheng-qiang,Deng Qing-chun,Yang Qian-qian,Fang Hai-dong,Liu Gang-cai. 2017

[3]Hydraulic properties of concentrated flow of a bank gully in the dry-hot valley region of southwest China. Su, Zhengan,Xiong, Donghong,Dong, Yifan,Zhang, Baojun,Zhang, Su,Zheng, Xueyong,Yang, Dan,Zhang, Jianhui,Fan, Jianrong,Zhang, Su,Fang, Haidong.

[4]Influence of bare soil and cultivated land use types upstream of a bank gully on soil erosion rates and energy consumption for different gully erosion zones in the dry-hot valley region, Southwest China. Su, Zhengan,Xiong, Donghong,Dong, Yifan,Yang, Dan,Zhang, Su,Zhang, Baojun,Zheng, Xueyong,Zhang, Jianhui,Yang, Dan,Zhang, Baojun,Zheng, Xueyong,Zhang, Su,Shi, Liangtao.

[5]Reduction, methylation, and translocation of arsenic in Panax notoginseng grown under field conditions in arsenic-contaminated soils. Ma, Jie,Mi, Yanhua,Li, Qiwan,Chen, Lu,Du, Lijuan,He, Lizhong,Ma, Jie,Lei, Mei.

[6]Determination of Trace Elements in Coptis teeta and Soil by ICP-AES. Liu, Guizhou,Cai, Chuantao,Zhang, Ji,Wang, Yuanzhong,Zhao, Yanli,Jin, Hang,Zhang, Xue. 2011

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：云南省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台