交替供水条件下土壤入渗特性与水盐分布特征研究  

Characteristics of Soil Infiltration and Water-salt Distribution under Alternate Irrigation

作　　者：刘静妍[1] 毕远杰 孙西欢[3] 郭向红[1] 马娟娟[1] 严亚龙[1] 

机构地区：[1]太原理工大学水利科学与工程学院,太原030024 [2]山西省水利水电科学研究院,太原030024 [3]山西水利职业技术学院,太原030024

出　　处：《灌溉排水学报》2015年第4期55-60,共6页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(51109154;51209131);教育部博士点基金项目(20111402120006);山西省青年科技研究基金资助项目(2012021026-2);山西省科技攻关项目(20110311018-1);山西省高等学校创新人才支持计划项目

摘　　要：采用室内一维垂直土柱入渗试验,对交替供水条件下微咸水连续及间歇入渗的土壤入渗特性及水盐分布特征进行研究。结果表明,在灌水时间相同的情况下,交替连续入渗随着交替次数的增加,湿润锋推进深度及累积入渗量都有一定程度的增加,而交替间歇入渗趋势与之相反。在咸淡交替供水方式下湿润锋和累积入渗量的线性函数关系未发生本质上的改变。随着交替次数的增加,间歇灌溉的土壤含水率变化率显著降低。在淡咸顺序下,电导率呈现两端积盐现象,而咸淡顺序下,电导率整体趋于上升趋势。后期灌溉水质对于表层电导率影响较大。The one-dimensional vertical soil column infiltration test was conducted to study the characteris- tics of soil infiltration and water salt distribution of continuous and intermittent infiltration under the alter- nate irrigation. The results showed that with the increase of alternate times, wetting front distance and cu- mulative in^i｜tration had a certain degree of increase in alternation of continuous infiltration, and the result of intermittent infiltration was the opposite. The linear relation between wetting front distance and cumu- lative infiltration amount did not essentially change under alternate irrigation. The soil moisture content rate of intermittent infiltration significantly reduced with the increase of alternate times. Electrical conduc- tivity presented salt accumulation phenomenon on both ends with saline water irrigation first. Electrical conductivity presented the overall upward trend with fresh water irrigation first. The water quality of the last irrigation had a great influence on the electrical conductivity of soil surface.

关 键 词：微咸水 交替灌溉 累积入渗量 湿润锋 电导率 

分 类 号：S274[农业科学—农业水土工程]