Runoff-sediment coupling in low vegetation coverage scenario: Insights from plot scale experiment in the loess environment
文献类型：期刊论文
| 作者 | Zeng, Yingxi3,4,5; Liu, Yu1,2,4,5; Wang, Cong1,2,3,4 |
| 刊名 | CATENA
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 265页码:109894 |
| 关键词 | Low vegetation coverage Runoff generation Sediment production Runoff-sediment coupling Loess environment Plot scale |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2026.109894 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Vegetation cover is generally considered as an effective factor reducing surface runoff and soil erosion. Yet the role of vegetation cover pattern plays in runoff generation and sediment production under low vegetation coverage remains unclear. This study aims to explore the impacts of vegetation cover pattern on runoff, sediment production, and their coupling under the low vegetation coverage scenario in the loess environment by experiment at plot scale. Ten experimental plots with a gradient of low vegetation coverage were established to monitor runoff generation and sediment production under natural rainfall events. Based on upslope contributing area (UCA) derived from the digital surface model (DSM) and orthoimages derived from the UAV photogrammetry, the rills on the soil surface were identified. The linear regression equations revealing the runoff-sediment coupling of each plot were established. Results showed increased rill area proportion, total runoff volume, and sediment production with increased vegetation coverage under the low vegetation coverage scenario. Sediment production exhibited a linear relationship with runoff volume, with no significant difference in slopes of fitting equations among plots. However, a significant increase in equation intercept corresponding to increased vegetation coverage was detected. These results indicated that the sediment carrying capacity of runoff kept consistent under low vegetation coverage. This study confirmed that the increasing vegetation coverage within the low coverage range promoted rill formation by impacting the evolution of microtopography and thus enhanced concentrated flow, which intensified runoff generation and soil erosion. Overall, the results revealed an enhancement stage of runoff and sediment generation under low vegetation coverage less than 10%. It is implied that there is a critical vegetation coverage threshold that must be surpassed to guarantee an effective reduction in soil and water loss, particularly in semiarid regions. |
| URL标识 | 查看原文 |
| WOS关键词 | SOIL-EROSION CONTROL ; RAINFALL INTERCEPTION ; SEMIARID CATCHMENT ; PLATEAU ; PATTERNS ; WATER ; CONNECTIVITY ; SIMULATION ; DENSITY ; THRESHOLDS |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001686374900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/220994]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Liu, Yu |
| 作者单位 | 1.Natl Observat & Res Stn Earth Crit Zone Loess Plat, Xian 710061, Peoples R China 2.Shaanxi Yanan Forest Ecosyst Natl Observat & Res S, Beijing 100085, Peoples R China; 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China; 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China; 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zeng, Yingxi,Liu, Yu,Wang, Cong. Runoff-sediment coupling in low vegetation coverage scenario: Insights from plot scale experiment in the loess environment[J]. CATENA,2026,265:109894. |
| APA | Zeng, Yingxi,Liu, Yu,&Wang, Cong.(2026).Runoff-sediment coupling in low vegetation coverage scenario: Insights from plot scale experiment in the loess environment.CATENA,265,109894. |
| MLA | Zeng, Yingxi,et al."Runoff-sediment coupling in low vegetation coverage scenario: Insights from plot scale experiment in the loess environment".CATENA 265(2026):109894. |
入库方式： OAI收割
来源：地理科学与资源研究所
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