Approximate Explicit Solution to Precipitation Head Vertical Infiltration of Green-Ampt Model
Abstract：Based on the analysis of precipitation head infiltration,it was on the premise of postulate for precipitation vertical one-dimensional infiltration also being suitable to the Philip infiltration model and applied Green-Ampt infiltration model to study the approximate explicit solution.The proper explicit function to cumulative precipitation vertical one-dimensional infiltration was established with the conversion relationship of the two models and was tested under 3 different soils.The applicability of Philip infiltration model under precipitation head vertical one-dimensional infiltration was verified.The explicit function to cumulative precipitation vertical one-dimensional infiltration was established based on the Green-Ampt infiltration model,whose IRE respectively was 1.89%,0.02%,0.10% and RMSE respectively was 0.13,0.07,0.08.The calculated value of cumulative infiltration tallied with the actual value well.It was suggest that this function had the good precision and could simulate the process of continual precipitation head infiltration effectively.
Keywords：precipitation headGreen-Ampt modelcumulative infiltrationexplicit function
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)