黄土地区水土保持林地土壤入渗规律的研究

A Study on the Infiltration Pattern of Forests for Soil and Water Conservation in the Loess Area

运用土壤物理学和土壤水动力学的理论和方法对晋西黄土地区水土保持林地土壤入渗进行了分析和计算，用Ｐｈｉｌｉｐ半解析迭代、递推的方法，求出了不同林地的Ｚ（θ，ｔ）函数和入渗方程。通过对理论公式计算值和实测值的比较，发现二者吻合甚好，证明所求的非饱和土壤水分运动方程的Ｐｈｉｌｉｐ解反映了研究地区土壤入渗的基本规律。同时计算结果表明，对于该研究地区的各种地类Ｐｈｉｉｉｐ入渗方程级数解，只取前三项即可满足精度要求。

This paper deals with infiltration of forests for soil and water conservation by thetheory of soil physics and soil water dynamics. The equations and Z(θ,t)are obtained in differentforest lands by the mothod of Philip. Comparisons between equation results and experimentalworks are highly satisfactory,The present results proved Philip progression based on the basic e-quation of soil water movement and showed the basic law of infiltration in the loess area. Thefirst three terms of the Philip progression solution can meet the demand.