| Effects of linear\|source measurement method on the soil infiltration process |
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| DOI：10.7606/j.issn.1000-7601.2020.03.04 |
| Key Words: water infiltration initial water content slope linear source |
| Author Name | Affiliation | | CUI Yufei | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Dry Land Agriculture, Ministry of Agriculture, Beijing 100081, China | | LI Yuzhong | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Dry Land Agriculture, Ministry of Agriculture, Beijing 100081, China | | GONG Daozhi | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Dry Land Agriculture, Ministry of Agriculture, Beijing 100081, China | | MAO Lili | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Dry Land Agriculture, Ministry of Agriculture, Beijing 100081, China |
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| Abstract: |
| Soil infiltration is an important part of water cycle. Accurate measurement of the soil infiltration process is of great importance for the irrigation management to study this process. Soil infiltration influenced by many factors such as soil properties and surface condition. In this study, the linear\|source measurement method for soil infiltration was used to discuss the effects of initial soil water content and slope on the soil infiltration process. Lab experiments were conducted with loam soil. Three initial soil water contents (air\|dry soil, 8.22% and 16.3%) and three surface slopes (0°,5° and 15°) were selected in this study. The measured soil infiltration rates were fitted with the Philip Infiltration Model. The results showed that a critical soil water content related to the maximum soil infiltrability existed, the stable infiltration rate was 39.8 mm·h-1. There was no obvious effect of slope on the soil infiltration according the results in this study, the stable infiltration rate of three surface slopes were 43.1、51.7 mm·h-1 and 52.8 mm·h-1. Too high or too low soil water content decreased soil infiltrability due to higher soil water content lowered the hydraulic gradient, while soil aggregates might be destroyed with lower soil water content. More experiments were needed to verify this conclusion. The initial soil infiltration process was observed in this study, so the discussions about the effects of soil water content and slope were more convincing. |
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