| Effect of mineralization degree of infiltration water on infiltration characteristics of severely saline-alkali soil |
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| DOI：10.7606/j.issn.1000-7601.2018.01.16 |
| Key Words: brackish water wetting front depth cumulative infiltration infiltration moisture content infiltration model |
| Author Name | Affiliation | | LIU Xiao-yuan | Institute of Agriculture Engineering and food science, Shandong University of technology, Zibo, Shandong 255049, China | | GAO Pei-ling | Institute of Agriculture Engineering and food science, Shandong University of technology, Zibo, Shandong 255049, China
Institute of Resources and Environment engineering,shandong University oftechnology, Zibo, Shandong 255049, China | | ZHANG Qing-wei | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100086, China | | WANG Nai-jiang | Institute of Agriculture Engineering and food science, Shandong University of technology, Zibo, Shandong 255049, China | | Zhao Lian-dong | Institute of Agriculture Engineering and food science, Shandong University of technology, Zibo, Shandong 255049, China |
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| Abstract: |
| One-dimension vertical water infiltration experiments were conducted using a vertical soil column. The study was conducted to study the relations between cumulative infiltration, wetting front depth, soil moisture content, infiltration rate and infiltration time under different mineralization degree of infiltration water. The results showed that cumulative infiltration, wetting front depth, soil moisture content increased with the mineralization degree of infiltration water. However, compared with fresh water, the changes of wetting front depth and cumulative infiltration of 2, 3, 4 g·L-1 and 5 g·L-1 is smaller. In the same depth of soil, soil moisture content was characterized by fresh water <5 g·L-1＜3 g·L-1＜2 g·L-1＜4 g·L-1. Cumulative infiltration was in good linear relationship with wetting front depth under brackish water irrigation. The Kostiakov infiltration model, Philip infiltration model and Green-Ampt infiltration model was compared in terms of quantifying saline water infiltration process, by which Kostiakov model was proposed. |
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