摘要
分析了在水力颗粒分异和垂直入渗两个过程用下形成的稻田土层剖面层次结构。论证了稻田土层剖面上出现非饱和流动区域的三个主要水力特征,并证明了在负压水头逐渐坛大区(A区)与负压水头逐渐减小区(B区)间存在一个压力水头梯度为零、下渗水流仅在重力作用下的层面,并以此为条件推导出下渗强度q的简化计算式。
The conditions for developing unsaturated zone and the characteristics of the stratum structure in paddy soil profile are expounded. The existence of interface with zero pressure gradient in unsaturated zone is proved based on changing the process of gradient in the zone. Accordingto the condition at the interface, the formula for calculating the infiltration intensity is obtained and much more simpler in shape and easier in calculation than that used in previous studies.
出处
《武汉水利电力大学学报》
CSCD
1993年第3期261-267,共7页
Engineering Journal of Wuhan University
基金
国家教委资助
关键词
水稻土
水力特征
下渗强度
hydraulic characteristics
rice soils
infiltration intensity