摘要
以非饱和土壤水分运动理论为基础,建立垂直一维入渗土壤水分运动的数学模型,对不同入渗水头条件下多种典型土壤垂直一维入渗特性进行模拟,模拟结果采用Philip模型拟合.结果表明:入渗水头对吸渗率、稳渗率有一定影响,提出了包括入渗水头和饱和导水率的Philip模型参数的确定方法.利用已有文献资料对所建模型进行验证,结果表明:所建模型能较简单地确定吸渗率和稳渗率,可以较准确地反映土壤水分垂直一维入渗特点.
Based on unsaturated soil moisture movement theory,the mathematical model of one-dimensional vertical infiltration was established and the simulation of infiltration characteristics of various typical soils with different infiltration heads was performed.The simulation result was fitted by Philip model and showed that the infiltration head would have some effect on infiltro-sorptivity and steady infiltration rate.A method for determining the parameters of Philip model such as infiltration heads and saturated hydraulic conductivity was presented.The established model was verified by the literatures and data available.It was shown that the established model was able to determine readily the infiltro-sorptivity and steady infiltration rate and reflect more accurately the characteristics of one-dimensional vertical infiltration of soil moisture.
出处
《兰州理工大学学报》
CAS
北大核心
2015年第1期65-70,共6页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51409137
51269008)
甘肃省自然科学基金(145RJYA293
112RJZA007)
甘肃省高等学校科研项目计划资助(2013B-019)
关键词
入渗水头
垂直一维入渗
Philip模型
吸渗率
稳渗率
infiltration head
one-dimensional vertical infiltration
Philip model
infiltro-sorptivity
steady infiltration rate
