Effect of ground cover on splash and sheetwash erosion over a steep forested hillslope: a plot-scale study
Article
Article Title | Effect of ground cover on splash and sheetwash erosion over a steep forested hillslope: a plot-scale study |
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ERA Journal ID | 1715 |
Article Category | Article |
Authors | Ghahramani, Afshin (Author), Ishikawa, Yoshiharu (Author), Gomi, Takashi (Author), Shiraki, Katsushige (Author) and Miyata, Shusuke (Author) |
Journal Title | Catena |
Journal Citation | 85 (1), pp. 34-47 |
Number of Pages | 14 |
Year | 2011 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0341-8162 |
1872-6887 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.catena.2010.11.005 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S034181621000175X |
Abstract | The contributions and relationships of erosion by splash and overland flow over a steep slope in a Japanese beech forest in plots with different percentages of ground cover were examined. Three erosion plots (2 m wide × 5 m long) with average understory coverage of 1%, 45%, and 94% were installed. Sediment transported by rain splash and by overland flow was sampled separately. For the plots with sparse, moderate, and high understory coverage, the average proportions of splash soil to total soil erosion during the monitoring period were 16%, 32%, and 18%, respectively. A significant correlation between the amount of splash soil and precipitation was found in the plots with 1% and 45% understory coverage, whereas no statistical relationship was identified for the plot with high understory coverage. At the sparse ground cover plot showing the largest sediment movement, the contribution of splash transport decreased with increasing precipitation. The amount of sheetwash erosion was significantly correlated with the amount of splash soil under the condition of sparse ground cover. This relationship was more pronounced during high precipitation events and the rainy season. Splash contribution to the sediment transport was in the range of 0.8%–76.7%, 2.8%–81% and 2.1%–60.8% for plot with high, moderate and low ground cover, respectively. The sparse ground cover showed the largest variation of splash and sheetwash contribution in soil erosion. This variability was due to variation in ground cover and soil surface wetness condition which led to a variation of detachment and non-linear relationship of sheetwash splash. |
Keywords | splash erosion; sheetwash; overland runoff; sediment transportation; forested steep hillslope |
ANZSRC Field of Research 2020 | 370704. Surface water hydrology |
419999. Other environmental sciences not elsewhere classified | |
410699. Soil sciences not elsewhere classified | |
370901. Geomorphology and earth surface processes | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Tokyo University of Agriculture and Technology, Japan |
Kyoto University, Japan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3q6x/effect-of-ground-cover-on-splash-and-sheetwash-erosion-over-a-steep-forested-hillslope-a-plot-scale-study
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