摘要
通过开展不同含沙量和粒径组成浑水测坑入渗试验,对灌水过程中(120min内)含沙量和粒径组成因素对不同土层土壤水吸力变化率及变化响应时间的影响进行了初步研究。研究认为:灌溉浑水含沙量越大,泥沙粒径组成越细,水分在土壤中的运动速度越缓慢;同时,泥沙粒径越细,含沙量变化对土壤水分变化的影响越明显,可认为,细颗粒泥沙较粗颗粒泥沙能够更有效地充填土壤孔隙,阻断土壤水下渗通道,从而减缓土壤水分运动速度。
Based on the leaching-pond experiment of muddy water infiltration with different sediment concentration and particle size, the effects of sediment concentration and particle size on the rate and response time of soil water tension change are analyzed. The results showed that, the higher sediment concentration and the finer particle size of muddy water for irrigation, the slower soil water moves, meanwhile, the impact on soil water movement is more obvious with the sediment particle size becomes finer. Finer sediment can more effectively fill up the pore space of soil, obstruct the path of soil water infiltration, and decrease the speed of soil water movement than coarse sediment.
出处
《节水灌溉》
北大核心
2013年第8期1-6,9,共7页
Water Saving Irrigation
基金
国家重点基础研究发展计划项目资助(2011CB403303)
黄河水利科学研究院中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2009-16
HKY-JBYW-2012-01)
关键词
浑水灌溉
测坑
含沙量
粒径
土壤水吸力
muddy water irrigation
leaching-pond
sediment concentration
particle size
soil water tension
