不同边界条件下入渗规律的研究

Study on Infiltration Law under Different Boundary Conditions

土壤质地、地下水位埋深、前期雨量以及入渗边界条件对累计入渗量 F与入渗强度 f之间的关系都有较大的影响。本文利用所建立的 h方程数学模型研究了薄层积水条件下 ,不同地下水位埋深不同降雨强度的入渗规律 ,得出以下结论 :(1 )在均匀降雨条件下 ,当产生积水以后 ,F- f 关系式与薄层积水条件下的 F- f 关系式一致 ;(2 )地下水位埋深大于 4m,F- f 关系式不随地下水位的变化而变化。

Soil properties, water table, previous rainfall amount and infiltration boundary condition, all have influences on the relationship between accumulative infiltration amount F and infiltration intensity f . The infiltration law of different water table and rainfall intensity are studied herein and the following conclusions are reached: 1 Under uniform rainfall, the relationship F-f is the same with that of under ponding condition. 2 When water table is below 4m relationship F-f will not change with the variation of water table.