Ephemeral gully evolution and morphological changes in the erosion-tillage-erosion cycle on steep loess slopes
文献类型：期刊论文
| 作者 | Liang, Wenqian1,2; Xu, Ximeng1,2; Zheng, Fenli2,3; Qin, Chao4 |
| 刊名 | CATENA
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 258页码:109257 |
| 关键词 | Tillage practices Rainfall erosion Laser scanner Farmland Upslope drainage area The Loess Plateau |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2025.109257 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Ephemeral gullies (EGs) are distributed on the farmlands across the world and play a significant role in soil loss and land degradation. However, the complete cyclic evolution process of EG channels, including formation, obliteration by tillage, and reformation under subsequent rainfall, remains underexplored. Thus, this study aims to investigate the EG evolution and morphological changes in the erosion-tillage-erosion cycle on a steep loess slope by using 0.01 m resolution digital elevation models (DEMs) obtained from Terrestrial Laser Scanner. A total of 107 cross-sections across three EGs were extracted, and six morphological indices, including W (EG channel width), D (EG channel depth), A (EG channel cross-sectional area), alpha (the angle from the EG lateral drainage area border to the EG channel border), /i (the angle from the EG channel border to the bottom), and W/D (EG channel width-depth ratio), were obtained. The results revealed that, from the post-rainy season in 2014 to the post-rainy season in 2015, W, D, and A increased by 8%-25%, 20%-40%, and 35%-69%, respectively, while alpha, /i, and W/D exhibited minor changes. EG with larger upslope drainage areas experienced more pronounced evolution, with D, A, and alpha increasing linearly with upslope drainage area across the three EGs, ranging from 0.05 m to 0.49 m, 67 cm2 to 2062 cm2, and 10 degrees to 26 degrees, respectively. A new cross-section morphological index incorporating upslope and lateral flow contributions, alpha & sdot;tan(/i), was introduced, which showed a consistent linear relationship with the product of the upslope drainage area and the square of local slope gradient in EGs, offering a tool for predicting EG cross-sectional morphology. This study provided insights into EG evolution and illustrated the role of tillage practices in EG evolution processes, which can provide a scientific basis for the construction of gully erosion prediction models. |
| URL标识 | 查看原文 |
| WOS关键词 | BLACK SOIL REGION ; TOPOGRAPHIC THRESHOLD ; DEGRADATION ; PLATEAU ; QUALITY ; DEFORESTATION ; CATCHMENTS ; RESISTANCE ; INITIATION ; CROPLAND |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001522454900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215357]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Xu, Ximeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Northwest A&F Univ, Coll Soil & Water Conservat Sci & Engn, State Key Lab Soil & Water Conservat & Desertifica, Yangling 712100, Shaanxi, Peoples R China; 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess Sci, Xian 710061, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liang, Wenqian,Xu, Ximeng,Zheng, Fenli,et al. Ephemeral gully evolution and morphological changes in the erosion-tillage-erosion cycle on steep loess slopes[J]. CATENA,2025,258:109257. |
| APA | Liang, Wenqian,Xu, Ximeng,Zheng, Fenli,&Qin, Chao.(2025).Ephemeral gully evolution and morphological changes in the erosion-tillage-erosion cycle on steep loess slopes.CATENA,258,109257. |
| MLA | Liang, Wenqian,et al."Ephemeral gully evolution and morphological changes in the erosion-tillage-erosion cycle on steep loess slopes".CATENA 258(2025):109257. |
入库方式： OAI收割
来源：地理科学与资源研究所
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