ASSESSMENT OF SOLUTE TRANSPORT AND DISTRIBUTION UNDER DRY DRAINAGE CONDITIONS USING A PHYSICAL MODEL
ASSESSMENT OF SOLUTE TRANSPORT AND DISTRIBUTION UNDER DRY DRAINAGE CONDITIONS USING A PHYSICAL MODEL
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DOI：
10.1002/ird.2370
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发表时间：
2019-08
影响因子：
1.9
通讯作者：
Shahab U. Ansari;J. Abedi-Koupai;B. Mostafazadeh‐Fard;M. Shayannejad;M. Mosaddeghi
中科院分区：
文献类型：
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作者：
Shahab U. Ansari;J. Abedi-Koupai;B. Mostafazadeh‐Fard;M. Shayannejad;M. Mosaddeghi
研究人员最近研究了干旱和半干旱地区传统排水系统的环境影响和投资成本降低方面的干排水。本研究利用物理模型研究了干旱排水对壤质土壤溶质运移的影响。试验历时84天，结果表明，干排水系统将大量的溶解盐从灌溉区转移到休闲区。此外，钠、钾、钙、硝酸盐和氯离子在休闲区的土壤表层积累，而镁则在深层积累。休闲区土壤表层钠、钾、钙、镁、硝酸盐和氯离子浓度与灌溉区相应值的比值分别为1.67、1.20、1.81、0.90、2.58和1.20。灌溉区土壤剖面SAR值变化较小，接近1.58，休闲区土壤剖面SAR值随土层深度的减小而增大，表层SAR值为2.17。虽然结果表明，干排水的能力，将离子从灌溉休耕区，建议进一步调查，就不同方面的这种方法。© 2019约翰威利父子有限公司
Researchers have recently investigated dry drainage in respect of decreasing environmental effects and investment cost reduction of traditional drainage systems in arid and semi‐arid regions. This study investigated the effect of dry drainage on solute transport in a loamy soil using a physical model. The experiment lasted 84 days and results showed that the dry drainage system transferred a significant amount of dissolved salts from the irrigated area into the fallow area. Moreover, sodium, potassium, calcium, nitrate and chloride ions accumulated in the upper layers of soil of the fallow area but magnesium accumulated in the deeper layers. The ratios of sodium, potassium, calcium, magnesium, nitrate and chloride concentrations at the soil surface of the fallow area to the corresponding values in the irrigated area were 1.67, 1.20, 1.81, 0.90, 2.58 and 1.20, respectively. In addition, variation of SAR in the soil profile of the irrigated area was low and its value approached 1.58, but it increased with decreasing soil depths of the fallow area reaching 2.17 at the soil surface of this area. Although the results demonstrated the capability of dry drainage to transfer ions from the irrigated to the fallow area, further investigation regarding different aspects of this method is recommended. © 2019 John Wiley & Sons, Ltd.