坡地未飽和層點源入滲行為之研究

Point-Source Infiltration into an Unsaturated Zone of Planar HiIIslope

陳樹群(Su-Chin Chen) ； 游功揚(Kong-Yung Yu)

《中華水土保持學報》 27卷1期 (1996/03) Pp. 53-59

https://doi.org/10.29417/JCSWC.199603_27(1).0006

摘要

均質等向平面坡的入滲行為，可藉由非飽和之非線性地下水流方程式求解。Philip曾對初始水份飽和度為均勻的坡地進行此解的推導。本文乃利用Philip的坡地入滲理論，研究坡地入滲之動力行為，並推求應用於坡地之Philip兩參數之入滲方程式。最後以石英砂為材質，進行砂箱試驗，用以印證坡地點源入滲之行為，同時發現在坡度小於30∘的平面坡，其入滲行為與水平坡面差異不大。

關鍵字

坡地入滲 ； 水力傳導度 ； 濕鋒

並列摘要

The solution of the full nonlinear unsaturation flow equation is given for a problem of infiltration into a planar hillslope of homogeneous isotropic soil with uniform initial moisture content. The solution was derived by Philip that useed the assumption of spatial equilibrium of initial moisture content. The objective of the study reported is to remedy the hillslope point-source infiltration by Philip's infiltration theory and to estimate the available algebraic infiltration equation of two parameters. An experiment of sand-box has been carried out to varify the theoretical results. Finally, for slope angles less then 30°, infiltration normal to slope differs relatively litter from infiltration from a horizontal surface.

並列關鍵字

Hillslope Infiltration ； Hydraulic Conductivity ； Wet Front