| Study on impact of sodium adsorption ratio of saline water on soil physical and chemical properties and infiltration characteristics |
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| DOI：10.7606/j.issn.1000-7601.2008.01.43 |
| Key Words: sodium adsorption ratio cumulative infiltration water content soil salt content |
| Author Name | Affiliation | | WU Zhongdong | Institute of Water Resources and Hydro-electric Engineering?Xi’an University of Technology, Xi’an, Shaanxi 710048, China；Institute of Resources and Environment Engineering Shandong University of Technology, Zibo, Shandong 255048, China | | WANG Quanjiu | Institute of Water Resources and Hydro-electric Engineering?Xi’an University of Technology, Xi’an, Shaanxi 710048, China；State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation the Chinese Academy of Sciences Yangling, Shaanxi 712100,China |
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| Abstract: |
| The exploration and utilization of saline water has become a valuable approach to remit freshwater resources insufficiency.The salt ion of the saline water influences the infiltration properties of the soil,and the incidence is different by the sodium adsorption ratio of the water.In order to analyze the influence of the sodium adsorption ratio to the soil infiltration capable,one dimensional infiltration experiments in laboratory was conducted in Nanpi experimental station of Academia Sinica,when the initial soil water content was 2.25% and the mineralization degree of the infiltration water was 3 g/L,both cumulative infiltration and wetting front change event with time was analyzed when infiltrated by saline water of different SAR.It is found that both of them has similar change law,it is precisely at SAR lower than 12.56(mmol/L)0.5 when analyzed by Philip model.The water movement is approximately like piston flow at the soil profile in company with variation of sodium adsorption ratio;soil salinity principal is influenced by the degree of mineralization of infiltrated water but almost unrelated with SAR.It is observed that Mg2+ and Ca2+ are displaced by Na+ when infiltrated by saline water with higher SAR,which led to the accumulation of Na+ in the upper soil layer. |
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