| 摘要: |
| “上土下砂”的层状土壤中有可能产生指流，在有指流产生条件下，研究灌施不同浓度的氯离子在层状土壤的迁移情况。结果表明：上层土壤中氯离子浓度沿垂直方向出现了先增大后减小的趋势，在下层指流域中的过渡区域氯离子浓度变化不是很大，在接近试验底部的累积区域氯离子产生累积，浓度增大；指尖处的氯离子浓度大于过渡区域氯离子浓度的浓度；指流通道对氯离子的迁移效率很高，占灌施进入土壤氯离子质量的35~55%。 |
| 关键词: 层状土壤，模拟指流， 溶质迁移 |
| DOI： |
| 分类号:S152.7 |
| 基金项目: |
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| Migration of chloride ions with different concentrations in layered soil with simulated finger flow |
|
wushuying
|
|
Gansu Urban Development Grop of Rural Rrevitalization Fund Limited
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| Abstract: |
| Finger flow can be produced in the layered soil which the structure is the “soil top and sand bottom”. In the condition of finger flow happened, The migration of chloride ions with different concentrations in layered soil was studied. The results showed that the chloride concentration in the upper soil increased first and then decreased in the vertical direction. The chloride concentration in the transition area in the lower drainage area did not change much. The chloride concentration in the accumulation area near the bottom of the test increased. The chloride concentration in the fingertip was higher than that in the transition area. The chloride concentration in the fingertip was higher than that in the transition area The transfer efficiency is very high, accounting for 35-55% of the mass of chloride ions in the soil. |
| Key words: layered structure soil， simulation finger flow，solute transport |
