The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study
Litter layers and topsoil have important effects on surface runoff. To investigate these effects at the plot scale, artificial rainfall experiments were conducted on micro-runoff plots in Guizhou Province, China. Three types of plots were selected, the thin litter layer with low soil bulk density ty...
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doaj-dda929fa118a4c2c9fef221d6d42c1612020-11-25T02:34:04ZengMDPI AGWater2073-44412018-07-0110791510.3390/w10070915w10070915The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case StudyQiuwen Zhou0Xu Zhou1Ya Luo2Mingyong Cai3School of Geographic and Environmental Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Geographic and Environmental Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Geographic and Environmental Science, Guizhou Normal University, Guiyang 550001, ChinaSatellite Environment Center of MEP, Beijing 100094, ChinaLitter layers and topsoil have important effects on surface runoff. To investigate these effects at the plot scale, artificial rainfall experiments were conducted on micro-runoff plots in Guizhou Province, China. Three types of plots were selected, the thin litter layer with low soil bulk density type (T-L type), the thick litter layer with high soil bulk density type (T-H type), and the moderate litter depth and soil bulk density type (M type), and three artificial rainfall intensities (30 mm/h, 70 mm/h, 120 mm/h) were used. The runoff volume was largest in the T-H type plot at different rainfall intensities and durations. Runoff in the M type plot had characteristics of both the T-L and T-H type plots. The runoff yielding speed was significantly higher and the runoff yielding time was significantly lower in the T-H type plot. In general, the runoff coefficient was the smallest in the T-L type plot and largest in the T-H type plot. The variations in the runoff coefficient were 15.6%, 19.3%, and 5.8% for the T-L, T-H, and M type plots respectively. The results of this study can improve the understanding of surface runoff processes at the plot scale under different litter and surface soil conditions.http://www.mdpi.com/2073-4441/10/7/915runoffsimulated rainfallplot scalelitter layertopsoilkarst |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qiuwen Zhou Xu Zhou Ya Luo Mingyong Cai |
spellingShingle |
Qiuwen Zhou Xu Zhou Ya Luo Mingyong Cai The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study Water runoff simulated rainfall plot scale litter layer topsoil karst |
author_facet |
Qiuwen Zhou Xu Zhou Ya Luo Mingyong Cai |
author_sort |
Qiuwen Zhou |
title |
The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study |
title_short |
The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study |
title_full |
The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study |
title_fullStr |
The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study |
title_full_unstemmed |
The Effects of Litter Layer and Topsoil on Surface Runoff during Simulated Rainfall in Guizhou Province, China: A Plot Scale Case Study |
title_sort |
effects of litter layer and topsoil on surface runoff during simulated rainfall in guizhou province, china: a plot scale case study |
publisher |
MDPI AG |
series |
Water |
issn |
2073-4441 |
publishDate |
2018-07-01 |
description |
Litter layers and topsoil have important effects on surface runoff. To investigate these effects at the plot scale, artificial rainfall experiments were conducted on micro-runoff plots in Guizhou Province, China. Three types of plots were selected, the thin litter layer with low soil bulk density type (T-L type), the thick litter layer with high soil bulk density type (T-H type), and the moderate litter depth and soil bulk density type (M type), and three artificial rainfall intensities (30 mm/h, 70 mm/h, 120 mm/h) were used. The runoff volume was largest in the T-H type plot at different rainfall intensities and durations. Runoff in the M type plot had characteristics of both the T-L and T-H type plots. The runoff yielding speed was significantly higher and the runoff yielding time was significantly lower in the T-H type plot. In general, the runoff coefficient was the smallest in the T-L type plot and largest in the T-H type plot. The variations in the runoff coefficient were 15.6%, 19.3%, and 5.8% for the T-L, T-H, and M type plots respectively. The results of this study can improve the understanding of surface runoff processes at the plot scale under different litter and surface soil conditions. |
topic |
runoff simulated rainfall plot scale litter layer topsoil karst |
url |
http://www.mdpi.com/2073-4441/10/7/915 |
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