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The role of surface microreliefs in influencing splash erosion: A laboratory study

Author

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  • Jia WU

    (Faculty of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, P.R. China
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, P.R. China)

  • Longshan ZHAO

    (College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, P.R. China
    State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, P.R. China;
    College of Forestry, Guizhou University, Guiyang, P.R. China)

  • Faqi WU

    (College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, P.R. China
    State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, P.R. China;)

  • Zhanbin LI

    (Faculty of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, P.R. China
    State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, P.R. China;)

Abstract

The detachment and transport of soil particles from soil mass are important effects of falling raindrops on soil erosion during rainfall. The objective of this study was to determine whether soil microrelief affects the detachability and transportability of soil particles by raindrop splash. Experimental microreliefs were manually simulated by two tillage practices: shallow hoeing, contour chisel plowing, and a smooth slope served as control treatment. The experiment included three simulated rainfall intensities (1.0, 1.5, and 2.0 mm/min). A splash board was used to collect sediment splashed upslope as well as that splashed downslope. Results show that microrelief has a positive effect on detachment rate (DRt) and has a negative effect on net downslope movement rate (SPnet). With the exception of DRt of which hoe treatment was less than smooth at the rainfall of 1.0 mm/min intensity, DRt of hoe and chisel treatments were twice as high as that of smooth to other treatments. For all treatments, SPnet of hoe and chisel treatments were less than half of smooth. Regression analysis showed that DRt change with increasing rainfall intensity could be described by a power function for all treatments. The change of SPnet could be described by a logarithmic function for hoe and chisel treatments, while the change of SPnet of the smooth treatment could not be described by a logarithmic function. Statistical results suggest that DRt was significantly influenced by rainfall intensity, while SPnet was not. Conversely, SPnet was significantly influenced by soil microrelief, while DRt was not.

Suggested Citation

  • Jia WU & Longshan ZHAO & Faqi WU & Zhanbin LI, 2016. "The role of surface microreliefs in influencing splash erosion: A laboratory study," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 11(2), pages 83-89.
    • Handle: RePEc:caa:jnlswr:v:11:y:2016:i:2:id:280-2014-swr
    DOI: 10.17221/280/2014-SWR
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    References listed on IDEAS

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    1. Longshan Zhao & Linhua Wang & Xinlan Liang & Jian Wang & Faqi Wu, 2013. "Soil Surface Roughness Effects on Infiltration Process of a Cultivated Slopes on the Loess Plateau of China," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(14), pages 4759-4771, November.
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    Cited by:

    1. June Liu & Fangyue Du & Xike Cheng & Xiaoqian Qi & Ning Wang & Nan Shen & Chunyan Ma & Zhanli Wang, 2024. "Impacts of Rainfall Characteristics and Slope on Splash Detachment and Transport of Loess Soil," Land, MDPI, vol. 13(2), pages 1-17, February.

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