沟灌与暗管排水协同作用对水盐运移的影响  

Effect of Synergistic Effects of Furrow Irrigation and Subsurface Drainage on Water-salt Migration

作　　者：董啸鹏 DONG Xiao-peng(Huize Engineering Design Consulting Co.Ltd.,Wuxi 214000,China)

机构地区：[1]无锡茴泽工程设计咨询有限公司,江苏无锡214000

出　　处：《海河水利》2024年第10期95-101,共7页Haihe Water Resources

摘　　要：为探明沟灌与暗管排水协同作用对滨海盐土水盐运移的影响,选取滨海典型盐碱地区进行现场试验,通过试验数据滤定并验证了HYDRUS模拟效果,并利用验证完成的模型探究了不同灌水沟和暗管设置参数对滨海盐土水盐运移的影响。结果表明,沟灌与暗管排水协同作用下土壤水盐运移为垄沟灌溉与暗管排水特征的综合体现,靠近垄沟的浅层土壤受垄沟灌溉影响显著,同深度土壤层沟深位置含盐量低、垄处含盐量高。靠近暗管的浅层土壤受暗管排水影响显著,距离暗管越近土壤含盐量越低。增加垄沟间距与深度可以提升淋洗深度,垄沟间距增加还可提升淋洗范围,同时垄上盐分累积增加。沟灌与暗管排水协同运用治理盐碱地时,应及时挖除垄上高盐分土壤,防止大量盐分冲淋下渗。研究成果可为盐碱地的改良与利用提供理论支撑。In order to investigate the effect of synergistic effect of furrow irrigation and subsurface drainage on water-salt migration in coastal saline soil,Tianjin Binhai New Area was selected as the research area,and field experiments were carried out in typical saline-alkali areas.The experimental data were filtered and verified by HYDRUS simulation effect.By using the verified model,the influence of different furrow irrigation and subsurface drainage on water-salt migration in coastal saline soil was explored.The results showed that soil water-salt migration under the synergistic action of furrow irrigation and subsurface drainage was a comprehensive reflection of furrow irrigation and subsurface drainage.The shallow soil near furrow irrigation was significantly affected by furrow irrigation,and the salt content at furrow depth was low in the soil layer with the same depth,while the salt content at ridge was high.The shallow soil near the subsurface drainage was significantly affected by the drainage of the subsurface drainage,and the closer the soil was to the subsurface drainage,the lower the soil salt content.The increase of ridge distance and depth can improve the leaching depth,and the increase of ridge distance can also improve the leaching range.At the same time,the accumulation of salt on the ridge increases,so the salt on the ridge should be treated in time to prevent a lot of salt from washing down.The research results can provide theoretical support for the improvement and utilization of saline-alkali land.

关 键 词：沟灌 排水暗管 海滨盐碱地 水盐运移 HYDRUS 

分 类 号：TV131.61[水利工程—水力学及河流动力学]