Impact of rock fragment size on erosion process and micro-topography evolution of cone-shaped spoil heaps
文献类型：期刊论文
| 作者 | Lv, Jiaorong1,3; Luo, Han1,2; Xie, Yongsheng1,2 |
| 刊名 | GEOMORPHOLOGY
 |
| 出版日期 | 2020-02-01 |
| 卷号 | 350页码:10 |
| 关键词 | Laser scanning Rainfall simulation Surface roughness Slope stability |
| ISSN号 | 0169-555X |
| DOI | 10.1016/j.geomorph.2019.106936 |
| 通讯作者 | Luo, Han(hanl@ms.iswc.ac.cn) |
| 英文摘要 | Spoil heaps in sites disturbed by construction cause severe acceleration of erosion, threatening environment quality and personal safety. Rock fragments (RFs) are a common component of spoil heaps; therefore, this study was conducted to evaluate the effects of different size classes of RFs on cone-shaped spoil heap erosion. A 3D laser scanner was used to capture the surface micro-topography evolution. A multi-day rainfall simulation experiment at 1.5 mm min(-1) rainfall intensity was conducted with 30 mass percent of RFs of different diameters (1-35,35-7,7-10, 10-15 cm). The results showed that RFs reduced runoff by 13.0% relative to the bare soil spoil heap, among which the RFs of the 7-10 cm size class performed best. Only the initial surface micro-topography factors increased with RF size. The stable micro-topography factors of 1-3.5 cm RF treatment were 59.2% larger than those for other RF treatments on average because of the slope slump. Spoil heaps containing small size (1-3.5) RFs more easily slumped with an area of 0.895 m(2) and showed obvious changes in micro-topography. RFs in different size classes influenced soil loss of spoil heaps via runoff yield and effects on slope stability. Larger roughness increment and runoff rate were associated with greater soil loss rate (R-2 = 0.828), but time-varying roughness had no effect on runoff. Overall, the results of this study provide a better understanding of the impact of RFs on spoil heap erosion. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | SOIL SURFACE-ROUGHNESS ; WATER-RETENTION ; HYDRAULIC CONDUCTIVITY ; RILL EROSION ; RUNOFF ; CONSTRUCTION ; INFILTRATION ; MICRORELIEF ; TILLAGE ; COVER |
| 资助项目 | Natural Science Foundation of China[41601300] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000532088300030 |
| 出版者 | ELSEVIER |
| 资助机构 | Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/159784]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Luo, Han |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lv, Jiaorong,Luo, Han,Xie, Yongsheng. Impact of rock fragment size on erosion process and micro-topography evolution of cone-shaped spoil heaps[J]. GEOMORPHOLOGY,2020,350:10. |
| APA | Lv, Jiaorong,Luo, Han,&Xie, Yongsheng.(2020).Impact of rock fragment size on erosion process and micro-topography evolution of cone-shaped spoil heaps.GEOMORPHOLOGY,350,10. |
| MLA | Lv, Jiaorong,et al."Impact of rock fragment size on erosion process and micro-topography evolution of cone-shaped spoil heaps".GEOMORPHOLOGY 350(2020):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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