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Article

Study on the Preferential Flow Characteristics under Different Precipitation Amounts in Simian Mountain Grassland of China

1
Jinyun Forest Ecosystem Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
2
Environmental Protection Research Institute of Light Industry, Research Center for Urban Environment, Beijing Academy of Science and Technology, Beijing 100095, China
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3489; https://doi.org/10.3390/w12123489
Received: 27 October 2020 / Revised: 7 December 2020 / Accepted: 9 December 2020 / Published: 11 December 2020
(This article belongs to the Section Hydrology and Hydrogeology)
Understanding the response of preferential flow paths to water movement is an important topic in soil hydrology. However, quantification of the complicated distribution patterns of preferential flow paths remains poorly understood. Therefore, dye experiments were conducted to investigate preferential flow characteristics under three different precipitation amounts (20, 40 and 60 mm, numbered as the G20, G40 and G60, respectively) in Simian Mountain grassland, Chongqing province, China. O-ring statistics were used to analyze the spatial distribution characteristics and the spatial correlation of preferential flow paths. Results revealed that precipitation could promote dye tracer infiltration into deeper soils, reaching the maximum depth of 55 cm in G60. The number of preferential flow paths in G60 plots was 3.0 and 7.4 times greater than those of G40 and G20, respectively. Structural distribution of the preferential flow paths showed a gradually clumped pattern with the increase of precipitation, which was conducive to enhancing the correlation between preferential flow paths in each pore size range. These results could expand our understanding of the effects of precipitation on the characteristic of preferential flow paths in grassland, which is helpful to evaluate the water movement in the study area. View Full-Text
Keywords: precipitation amounts; preferential flow paths; grassland; spatial point pattern analysis precipitation amounts; preferential flow paths; grassland; spatial point pattern analysis
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MDPI and ACS Style

Li, M.; Yao, J.; Cheng, J. Study on the Preferential Flow Characteristics under Different Precipitation Amounts in Simian Mountain Grassland of China. Water 2020, 12, 3489. https://doi.org/10.3390/w12123489

AMA Style

Li M, Yao J, Cheng J. Study on the Preferential Flow Characteristics under Different Precipitation Amounts in Simian Mountain Grassland of China. Water. 2020; 12(12):3489. https://doi.org/10.3390/w12123489

Chicago/Turabian Style

Li, Mingfeng; Yao, Jingjing; Cheng, Jinhua. 2020. "Study on the Preferential Flow Characteristics under Different Precipitation Amounts in Simian Mountain Grassland of China" Water 12, no. 12: 3489. https://doi.org/10.3390/w12123489

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