How does land use/cover influence gully head retreat rates? An in-situ simulation experiment of rainfall and upstream inflow in the gullied loess region, China
文献类型：期刊论文
| 作者 | Kang, Hongliang2; Wang, Wenlong2,3; Guo, Mingming4; Li, Jianming1,3; Shi, Qianhua2 |
| 刊名 | LAND DEGRADATION & DEVELOPMENT
 |
| 出版日期 | 2021-04-18 |
| 页码 | 16 |
| ISSN号 | 1085-3278 |
| 关键词 | collapse gully head retreat hydraulic erosion land use cover mass movement simulated rainfall |
| DOI | 10.1002/ldr.3892 |
| 通讯作者 | Wang, Wenlong(nwafu_wwl@163.com) |
| 英文摘要 | Land use/cover plays a crucial role in gully head retreat (GHR). However, little is known about how land use/cover influences GHR rates. An in situ simulation experiment of rainfall and upstream inflow was conducted in a gullied loess region to investigate hydraulic erosion, mass movements, and linear GHR processes under three types of land use/cover (bare land, grassland, and shrub-grass land). The results showed that the average linear GHR rates on grassland and shrub-grass land were 87-89% and 72-81% lower than that on bare land (0.99-2.06 cm min(-1)), respectively. Gully heads retreat by hydraulic and gravitational erosion. In the case of hydraulic erosion, upstream runoff incision is dominant on bare land, while undercutting by on-wall and jet flow dominates on grassland and shrub-grass land. In the case of mass movement, collapse dominates with a frequency of 62-100%, of which gully sidewall collapse is most common, especially on bare land and it acts to widen the gully. Gully headwall collapse dominates on grassland and shrub-grass land to cause retreat of the gully head. Overall, on bare land, upstream runoff incision dominates GHR. However, on grassland/shrub-grass land GHR is mainly driven by the undercutting of on-wall and jet flow and subsequent gully headwall collapses. As a consequence, the GHR length on bare land exponentially increases over time, while on grassland or shrub-grass land, it discretely increases as an analogous step function. Moreover, the average linear GHR rate on grassland was considerably lower than that on shrub-grass land, implying that an optimized vegetation restoration pattern enhances GHR control. |
| 资助项目 | National Natural Science Foundation of China[42077079] ; National Natural Science Foundation of China[41571275] ; China Postdoctoral Science Foundation[2020M681062] |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000640877800001 |
| 资助机构 | National Natural Science Foundation of China ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/161704]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Wenlong |
| 作者单位 | 1.Yangtze River Sci Res Inst, Dept Soil & Water Conservat, Wuhan, Peoples R China 2.Northwest A&F Univ, Inst Water & Soil Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Harbin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kang, Hongliang,Wang, Wenlong,Guo, Mingming,et al. How does land use/cover influence gully head retreat rates? An in-situ simulation experiment of rainfall and upstream inflow in the gullied loess region, China[J]. LAND DEGRADATION & DEVELOPMENT,2021:16. |
| APA | Kang, Hongliang,Wang, Wenlong,Guo, Mingming,Li, Jianming,&Shi, Qianhua.(2021).How does land use/cover influence gully head retreat rates? An in-situ simulation experiment of rainfall and upstream inflow in the gullied loess region, China.LAND DEGRADATION & DEVELOPMENT,16. |
| MLA | Kang, Hongliang,et al."How does land use/cover influence gully head retreat rates? An in-situ simulation experiment of rainfall and upstream inflow in the gullied loess region, China".LAND DEGRADATION & DEVELOPMENT (2021):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
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