Knowledge Resource Center for Ecological Environment in Arid Area
A Study on Vegetation-eolian Sand Erosion Dynamics and Its Applications | |
Li, Yanfu1; Wang, Zhaoyin2; Han, Lujie2; Liu, Le2 | |
通讯作者 | Li, Yanfu |
会议名称 | 35th World Congress of the International-Association-for-Hydro-Environment-Engineering-and-Research (IAHR) |
会议日期 | SEP 08-13, 2013 |
会议地点 | Chengdu, PEOPLES R CHINA |
英文摘要 | Moving sand dunes destroy vegetation and aggravate desertification. Whereas, vegetation fix moving sand dunes and prevent desertification. Vegetation and eolian sand erosion are a pair of competing and interactive factors that affect the geomorphic tendency of desertification area. Currently, Sanjiangyuan has been partly desertified and the vegetation has been scarred with sand dunes. Vegetation and moving sand dunes struggle drastically in the fringe area of desert. When the moving sand dunes are controlled by vegetation, the desert expansion will stop. Therefore, it is necessary to evaluate and predict the tendencies of vegetation development and the eolian sand movement for desert management and ecological restoration in Sanjiangyuan. In this study, taking the fringe area of desert as the research area, the vegetation-erosion dynamics was developed and applied to the desertification area. Considering certain stresses including planting trees, cutting trees and erosion reduction measures, a coupling equation of vegetation coverage and eolian sand erosion dynamic were developed. This model can be used to simulate and predict the tendencies of vegetation development and eolian sand dunes movement in fringe area of the desertification area. Based on remote sensing images of 10 years since 1977, ground-object identification of 43 spots, eolian sand erosion depths of 10 field spots and meteorological data of 30 years, the vegetation-eolian sand erosion dynamics was applied in the fringe area of Mugetan desertification area in the source region of Yellow River. The vegetation-eolian sand erosion chart of Mugetan desertification area was worked out. The vegetation-eolian sand erosion chart of the source region of Yellow River has a relatively large C-Zone. It is showed that once the vegetation coverage reaches a certain value, the vegetation in the source region of Yellow River will have a strong ability to self-improve, whether through natural vegetation development process or through artificial vegetation succession process. As long as the vegetation does not suffer severely damage, the vegetation will stably fix the sand dunes. |
英文关键词 | Sanjiangyuan Eolian sand erosion Vegetation development Ecological stresses Vegetation-eolian sand erosion dynamics |
来源出版物 | PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS I AND II |
出版年 | 2013 |
页码 | 3234-3243 |
EISBN | 978-7-302-33544-3 |
出版者 | TSINGHUA UNIV |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | CPCI-S |
WOS记录号 | WOS:000343761504042 |
WOS关键词 | TRANSPORT |
WOS类目 | Engineering, Civil ; Water Resources |
WOS研究方向 | Engineering ; Water Resources |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/301892 |
作者单位 | 1.Nanjing Hydraul Res Inst, Nanjing 210029, Jiangsu, Peoples R China; 2.Tsinghua Univ, Beijing 100084, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Yanfu,Wang, Zhaoyin,Han, Lujie,et al. A Study on Vegetation-eolian Sand Erosion Dynamics and Its Applications[C]:TSINGHUA UNIV,2013:3234-3243. |
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