Critical topographic threshold of gully erosion in Yuanmou Dry-hot Valley in Southwestern China
文献类型：期刊论文
| 作者 | Dong, Yifan1,2 ; Xiong, Donghong1,2; Su, Zheng'an1,2; Li, Jiajia3; Yang, Dan1,2; Zhai, Juan3; Lu, Xiaoning3; Liu, Gangcai1,2; Shi, Liangtao4
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| 刊名 | PHYSICAL GEOGRAPHY
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| 出版日期 | 2013 |
| 卷号 | 34期号:1页码:50-59 |
| ISSN号 | 0272-3646 |
| 关键词 | gully gully initiation morphological parameter Yuanmou Dry-hot Valley critical threshold |
| 通讯作者 | 熊东红 |
| 英文摘要 | Gully initiation has been a subject of much discussion in the field of gully erosion. Gully initiation could be examined by the S-Delta relationship (S = alpha Lambda(-b)) between the critical slope of the gully head (S) and the upstream drainage area (A). Gully erosion plays an important role in sediment yield and land degradation in the Dry-hot Valley region of Southwest China; however, little research has focused on gully development in this region. This study investigated gully morphology and the critical topographic threshold of permanent gullies in Yuanmou Dry-hot Valley. Data for 36 gully heads were derived from the gully digital elevation model created by high-precision real-time kinematic GPS (RTK GPS). A significant relationship between gully length and volume (r(2) = 0.77, p < 0.01) was found to exist, indicating that gully length can be used to estimate the gully erosion rate. Additionally, as vegetation coverage inside the gully increases, the gully morphology tends to be stable. The S-A relationship was S = 0.5195A(-0.0899), while AS(2) values ranged between 4.2 and 758.5 m(2). The low value of constant b (0.0899) indicates that collapse of the gully wall is the dominant process of gully erosion in Yuanmou Dry-hot Valley. |
| 学科主题 | 自然地理学 ; 土壤学 |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Physical Geography ; Geology ; Meteorology & Atmospheric Sciences |
| 关键词[WOS] | BLACK SOIL REGION ; LOESS PLATEAU ; NORTHEASTERN CHINA ; PREDICTION ; INITIATION ; CATCHMENT ; MODEL ; ENVIRONMENT ; CHANNEL ; CRACKS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319565000004 |
| 公开日期 | 2013-12-20 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6650]  |
| 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, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Chengdu Univ Informat Technol, Dept Environm Engn, Chengdu 610225, Peoples R China 4.Yunnan Acad Agr Sci, Inst Trop Ecoagr Sci, Yuanmou 651300, Yunnan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Yifan,Xiong, Donghong,Su, Zheng'an,et al. Critical topographic threshold of gully erosion in Yuanmou Dry-hot Valley in Southwestern China[J]. PHYSICAL GEOGRAPHY,2013,34(1):50-59. |
| APA | Dong, Yifan.,Xiong, Donghong.,Su, Zheng'an.,Li, Jiajia.,Yang, Dan.,...&Shi, Liangtao.(2013).Critical topographic threshold of gully erosion in Yuanmou Dry-hot Valley in Southwestern China.PHYSICAL GEOGRAPHY,34(1),50-59. |
| MLA | Dong, Yifan,et al."Critical topographic threshold of gully erosion in Yuanmou Dry-hot Valley in Southwestern China".PHYSICAL GEOGRAPHY 34.1(2013):50-59. |
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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