Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow
文献类型：期刊论文
| 作者 | Wang, Hao; Liu, Fa; Zhang, Guang-Hui; Sun, Fubao; Sun, Long |
| 刊名 | EARTH SURFACE PROCESSES AND LANDFORMS
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 42期号:15页码:2640-2648 |
| 关键词 | Biological Soil Crusts Binding And Bonding Effects Contribution Rate Rill Erodibility Loess Plateau |
| 英文摘要 | Biological soil crusts (BSCs) have impacts on soil detachment process through surface covering, and binding and bonding (B&B) mechanisms, which might vary with successional stages of BSCs. This study was conducted to quantify the effects of surface covering, binding and bonding of BSCs on soil detachment capacity by overland flow in a 4m long hydraulic flume with fixed bed. Two dominant BSC types, developed well in the Loess Plateau (the early successional cyanobacteria and the later successional moss), were tested using natural undisturbed soil samples collected from the abandoned farmlands. Two treatments of undisturbed crusts and one treatment of removing the above-ground tissue of BSCs were designed for each BSC type. For comparison, bare loess soil was used as the baseline. The collected soil samples were subjected to flow scouring under six different shear stresses, ranging from 6.7 to 21.2Pa. The results showed that soil detachment capacity (D-c) and rill erodibility (K-r) decrease with BSC succession, and the presence of BSCs obviously increased the critical shear stress, especially for the later successional moss crust. For the early successional cyanobacteria crust, D-c was reduced by 69.2% compared to the bare loess soil, where 37.7% and 31.5% are attributed to the surface covering and B&B, respectively. For the later successional moss crust, D-c decreased by 89.8% compared to the bare loess soil, where 68.9% and 20.9% contributed to the surface covering and B&B, respectively. These results are helpful in understanding the influencing mechanism of BSCs on soil erosion and in developing the process-based erosion models for grassland and forestland. Copyright (c) 2017 John Wiley & Sons, Ltd. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39082]  |
| 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 | Wang, Hao,Liu, Fa,Zhang, Guang-Hui,et al. Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2017,42(15):2640-2648. |
| APA | Wang, Hao,Liu, Fa,Zhang, Guang-Hui,Sun, Fubao,&Sun, Long.(2017).Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow.EARTH SURFACE PROCESSES AND LANDFORMS,42(15),2640-2648. |
| MLA | Wang, Hao,et al."Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow".EARTH SURFACE PROCESSES AND LANDFORMS 42.15(2017):2640-2648. |
入库方式： OAI收割
来源：生态环境研究中心
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