高校地质学报2023，Vol.29Issue(6)：934-944,11.DOI:10.16108/j.issn1006-7493.2022048
非饱和带排水及吸水过程中水分分布特征研究
Characteristics of Water Saturation During Drainage and Imbibition Processes in Unsaturated Zones
摘要
Abstract
The unsaturated zone,which is the link between the surface water and groundwater,plays a key role in controlling water exchange and solute transport in the soils.Infiltration in the unsaturated zone is in essence a problem of two-phase(air and water)immiscible displacement.A deep understanding of the air-water displacement process in the unsaturated zone is of great significance for the management and sustainable use of groundwater.A series of drainagei-mbibition experiments are carried out to study the water-content distribution in the unsaturated zone.The light transmission method is used to monitor water content in the 2-dimensional sandbox during the drainage-imbibition cycles.It is found that the lateral fluctuation of water content in the drainage process(0.145-0.175)is greater than that in the imbibition process(0.150-0.165)due to the existence of unstable drainage processes at the pore-scale.The difference of water content between drainage and imbibition means that the mechanism happened at pore-scales should also be affected by water movement at darcy-scales.关键词
非饱和带/水分分布/排水-吸水过程/光透法Key words
unsaturated zone/water content distribution/drainage and imbibition process/light transmission method分类
天文与地球科学引用本文复制引用
张圣山,卫云波,顾熙..非饱和带排水及吸水过程中水分分布特征研究[J].高校地质学报,2023,29(6):934-944,11.基金项目
国家自然科学基金(42102282)资助 （42102282）
