摘要
该文对研究包气带水分运移常用的毛管势理论、土水势理论、层流理论和湿润锋面入渗理论存在的问题进行了综述。指出毛管势理论对土壤孔隙形状的概化严重失实 ,对水驱动力种类考虑的不够全面 ;土水势理论的问题出现在对理论的过分简化上 ;层流理论用于非饱和流既缺乏实验依据 ,也缺乏理论依据 ;湿润锋面入渗理论没有考虑土壤水优势流的影响。
Some problems of common theories-capillary potential theory, soil moisture potential theory, laminar flow theory and wetting front infiltration theory-studying the moisture migration in aeration zone are summarized. The problem of capillary potential theory is that the hypothesis of pore shapes in soil is far from reality and the type of driving force is not considered all-sidedly. Problems are caused by the over simplification of soil moisture potential theory.It has no experimental and theoretical foundation that assuming water flow in aeration zone is laminar flow. The problem of wetting front infiltration theory is the neglect of the affection of preferential flow in soil.
出处
《勘察科学技术》
2001年第3期37-40,共4页
Site Investigation Science and Technology
关键词
包气带
水分运移
毛管势
土水势
层流
湿润锋面
土壤
aeration zone
moisture migration
capillary potential
soil moisture potential
laminar flow
wetting zone
