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Title

EVALUATING SOME INFILTRATION MODELS UNDER DIFFERENT PEDOGENIC AREA IN IRAN

Pages

 Start Page 79 | End Page 96

Abstract

 Quantitative description of INFILTRATION process is crucial for many applications as well as modeling purposes. The importance of the INFILTRATION process has enforced the soil and water researchers to model this process for quantitative applications. In this research, the performance of some INFILTRATION models (i.e. Kostiakov, kostiakov- Lewis, Horton and Philip) were evaluated. Therefore, the double ring INFILTRATION data of 123 points from some different soil series were collected. The parameters of these models were then obtained, using sum of least squares error method. In order to quantify the prediction accuracy of the models, the mean error (ME), the root mean square error (RMSE), the mean absolute of mean error (MAME) and Pearson correlation coefficient (r) were obtained. The results indicated that KOSTIAKOV-LEWIS MODEL had the best performance, while Kostiakov and PHILIP MODELs had the worst accuracy. The performance of Kostiakov, Horton and PHILIP MODELs were highly related to the location in which the data were collected. While, the performance of KOSTIAKOV-LEWIS MODELs was not site-specific. The performance of all models varied in different soil textures, except KOSTIAKOV-LEWIS MODEL. Totally, the evaluation of the models shown that at description of soil water INFILTRATION Kostiakov-Lewis is the best and Kostiakov and PHILIP MODELs do that with the least accuracy.

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