颗粒级配对毛细水上升影响的研究  

Effect of Particle Size Distribution on Capillary Water Upward Movement

作　　者：张平[1] 吴昊[1] 殷洪建[1] 王海坤[1] 李宝刚[1] 

机构地区：[1]沈阳大学建筑工程学院,辽宁沈阳110044

出　　处：《节水灌溉》2010年第7期24-26,共3页Water Saving Irrigation

基　　金：科技部资助项目(2006BAD04B09)

摘　　要：为了研究颗粒级配对毛细水上升的影响,通过观察同一含水量的土样在不同颗粒大小或不同颗粒级配条件下,毛细水上升速度、高度与时间的关系,得到如下结论:①粗、中、细、极细4种粒组所组成的土样,在毛细水上升开始阶段中粒速度最大,随着时间的推移,颗粒越细上升的速度变得相对越快,颗粒愈粗达到最大高度所需的时间愈短。②不同颗粒级配条件下对毛细水上升高度影响较大的是极细粒组的含量,细粒含量的增大毛细水上升高度增大。同一类土毛细水上升的特征是随细颗粒含量增多相对上升速度由慢变快。The effect of particle size distribution on capillary water upward movement is studied through exploring the relationship among the velocity,height and time of the capillary water upward movement in the soils in the same aquifer,which are filled by the particles in coarse,middle,thin and fine sizes,respectively.The conclusions are as follows.①The velocity of capillary water upward movement of the middle-sized particles is the fastest at the beginning,and in the later stage the velocity becomes fastest and faster in the thin and fine particles;in the coarse particles the minimum time is required for the capillary water to reach the maximum height.②The height of the capillary water upward movement is dependent on the size gradation of particles.It significantly increases in the soil containing higher amounts of particles of thin and particularly fine size,as a result of the acceleration of the capillary water upward movement.

关 键 词：毛细水 颗粒级配 含水层 土样 

分 类 号：S152[农业科学—土壤学]