Evaluation and comparison of water infiltration models in the Zayanderud catchment of Isfahan (Regional analysis of the Najafabad hydrological unit)
Hamid Fazel
1
,
Hossein Babazadeh
2
*
,
Fariborz Abbasi
3
,
Roghayeh Katani
4
1 - Department of Water Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 - Water Sciecne and Engineering Department, Science and Research Branch, Islamic Azad University, Tehran, Iran
3 - Agricultural Engineering Research Institute (AERI)
4 - Yasooj University
Keywords: Horton's model, Kostiakov Lewis's model, Novel's model, Philip's model, Soil infiltrability,
Abstract :
Due to the limitation of underground water resources, proper and optimal use of these resources is necessary. Water infiltration in the soil is important in hydrology studies, water management, protection and control of soil erosion and implementation of irrigation projects. Therefore, it is necessary to calibration and evaluation different permeability estimation models in different areas. The purpose of this research is to investigate the ability of common infiltration models such as Phillip, Horton, Kostiakov Lewis and Novel to estimate the amount of infiltration in soil textural classes in Zayanderud basin of Isfahan. In this study, 36 different points in Najafabad region from the Zayanderud basin were selected and infiltration was measured using a double loop. To evaluate the accuracy of the models, error metrics including root mean square error (RMSE), explanation coefficient (R), evaluation error (EE) and Nash Sutcliffe criterion (NSE) have been used. The calibration of the models has been done using solver of the Excel software and the table of correlation coefficients was presented to identify the relationships between different parameters of the models. The findings show that some parameters such as S (soil absorption coefficient in Philips model) and (initial infiltration speed) have a strong positive correlation, while parameters such as (final infiltration speed) have a weak relationship with other parameters. Also, one-way analysis of variance (ANOVA) and comparison of means were performed using Tukey's test to check the significant differences between the models which the non-significance of Philip's model compared to Horton and Kostiakov-Lewis models and the significance of Philip's model compared to Novel, Horton's model in Comparison with Novell and also Kastyakov-Lewis compared with Novell were obtained. The results of the evaluation indices showed that the performance of Philip's infiltration model with the average values of RMSE (cm/min), R, NSE and EE equal to 0.0838, 0.978, 0.876 and 18.49%, respectively, was better than other considered models in the studied area.
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