Estimation of Infiltration Curved Formulas by using Infiltration Capacity Experiment in the Hongcheun-River Watershed

Abstract

This study provided the value of infiltration capacity by soils after taking experiments of initial infiltration capacity on 29 sites from 18 soil series that were selected from the area of Hongcheon River. According to the result of our study, there is no significant difference between the field and the paddy in terms of initial infiltration capacity, but there is a huge difference between woods and the earth. Then, we suggested a curve formula of infiltration capacity on soil series that have a high defining coefficient based on the data from our study. In the end, we compared effective precipitation by methods of measuring it. The result of this comparison suggested that water is spilled intensively in the latter half of raining when Horton's method is used, and water is spilled from the beginning and is spilled more in the latter half when NRCS is used. The value of effective precipitation was calculated less when Horton's infiltration capacity curve formula was used than when NRCS's AMC-II conditions were applied.