| Effects of soil clay particle content on soil infiltration capacity by simulated experiments |
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| DOI：10.7606/j.issn.1000-7601.2009.03.14 |
| Key Words: soil water infiltration soil clay particle content infiltration model |
| Author Name | Affiliation | | LI Zhuo | College of Resources and Environment Northwest A ＆ F University, Yangling, Shaanxi 712100, China | | WU Pute | Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | FENG Hao | Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | ZHAO Xining | Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | HUANG Jun | College of Water Resources and Architectural Engineering Northwestern A＆F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to investigate the influence of soil clay particle content on soil infiltration capacity, the researchers compounded some kinds of soils by adding sand and clay to natural soil, and then simulated the influence of artificial soil clay particle content on soil infiltration capacity by water accumulated column infiltration.The results showed that: (1) clay particle content has a great effect on soil infiltration capacity, the more clay contained, the weaker infiltration capacity.The stable infiltration rate decreased from 0.0169 cm/min to 0.0068 cm/min and 90-min cumulative infiltration decreased from 3.66 cm to 2.02 cm as clay particle (<0.001 mm) content increased from 6% to 40.4%. (2) The stable infiltration rate and 90-min cumulative infiltration have negative power and exponential function relationship with clay particle content and so physical clay particle (<0.01 mm) content.But the correlation with clay particle content was better. (3) Through fitting parameters of Green-Ampt model, Philip model, Kostiakov model and using these models to calculate the cumulative infiltration, the researchers found that Kostiakov model has highest fitting accuracy, Philip model took second place and Green-Ampt model was worst in this experiment.It illustrated that Kostiakov model is more practical. |
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