Abstract: Horton’s equation is one of the earliest and most popular empirical models for simulating infiltration. The aim of this paper is to evaluate the method for determining Horton’s decay constant from three (3) methods to determine their simplicity and accuracy. Six (6) infiltration tests was carried out and the average of the six tests was used for determining the steady state infiltration rate ic = 4cm/hr and initial infiltration rate io = 34cm/hr. Three methods were used to evaluate the decay constant k, Method I and III gave same result 0.8099 and the result of Method II is 0.8086. It is clear that there is no significant difference between the results, method II proved to be error prone. Method I is highly recommended above Method II and III because it is less disposed to error and simple to calculate.
Keywords: Decay constant, linear regression, infiltration capacity, Horton’s model.
Title: Evaluation of Methods for Estimating the Decay Constant (K) of Horton’s Infiltration Model
Author: Ajayi A. S., Brai M. A., Eriakha E. C., Ehiomogue P.
International Journal of Interdisciplinary Research and Innovations
ISSN 2348-1218 (print), ISSN 2348-1226 (online)
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