Effects of surficial condition and rainfall intensity on runoff in a loess hilly area, China
文献类型：期刊论文
| 作者 | Wei, Wei ; Jia, Fuyan ; Yang, Lei ; Chen, Liding ; Zhang, Handan ; Yu, Yang |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 513期号:1页码:115-126 |
| 关键词 | Runoff Rainfall simulation Water loss Plant species Vegetation position Surface cover |
| ISSN号 | 0022-1694 |
| 中文摘要 | Knowledge of the so-called "source-sink" pattern of surface runoff is important for soil conservation, water resources management and vegetation restoration in the dry-land ecosystems. Micro-runoff plot and rainfall simulation are effective tools in quick understanding the relations between land surface and runoff dynamics. This study made full use of these tools to examine the effect of various factors (plant species, surface cover, vegetation distribution) on runoff generation in the semiarid loess hilly area of China. Two major simulated rainfall intensities (52 mm h(-1) and 28 mm h(-1)) were designed and conducted, which can represent heavy rainstorms and moderate rainfalls in the local region, respectively. Results showed that the responses of runoff generation and dynamics were far more sensitive to high-intensity rainfalls. Rainfall events with only 1.8 times an increase in intensity and 16% decrease in duration caused a sharp increase in total discharge (13.96 times), runoff depth (16.33 times), mean flow velocity (12.17 times), peak flow velocity (9.34 times) and runoff coefficient (9.23 times), respectively. The time to runoff generation however, was shortened by 70%, which raised the alarm to caution against the risks of hydrological disasters induced by potential rainfall variation in the context of climatic change. More importantly, different plant species and surface cover play various roles in runoff generation and processes. Due to the difference in plant morphology and effective surface cover, runoff delay, total discharge retention and peak-flow reduction with shrubs (seabuckthom) were more effective than those with secondary natural grass, followed by biological crust and bare soil. Notably, the specific positions of shrub species along the slope affects the time to runoff, specific flow process and total volume significantly. Shrubs in the lower positions acted as more powerful buffers in preventing runoff generation and surface water loss. Such findings can provide important references for runoff control, water conservation and ecosystem restoration regarding plant selection and vegetative collocation in practice in the arid and semiarid environments. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000337258900012 |
| 公开日期 | 2015-03-23 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9151]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wei, Wei,Jia, Fuyan,Yang, Lei,et al. Effects of surficial condition and rainfall intensity on runoff in a loess hilly area, China[J]. JOURNAL OF HYDROLOGY,2014,513(1):115-126. |
| APA | Wei, Wei,Jia, Fuyan,Yang, Lei,Chen, Liding,Zhang, Handan,&Yu, Yang.(2014).Effects of surficial condition and rainfall intensity on runoff in a loess hilly area, China.JOURNAL OF HYDROLOGY,513(1),115-126. |
| MLA | Wei, Wei,et al."Effects of surficial condition and rainfall intensity on runoff in a loess hilly area, China".JOURNAL OF HYDROLOGY 513.1(2014):115-126. |
入库方式： OAI收割
来源：生态环境研究中心
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