نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران.
2 گروه خاکشناسی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Water infiltration into soil is one of the key processes in the hydrological cycle and plays a decisive role in water resources management and runoff control. The objective of this study was to evaluate the performance of several empirical and semi-empirical infiltration equations in various soil texture groups (coarse, medium, and fine) of a semi-arid region in Zanjan Province. For this purpose, field infiltration experiments were conducted at 68 locations using the double-ring infiltrometer method. After soil sampling, selected soil properties were measured. The measured infiltration data were fitted using four empirical models (Kostiakov, Kostiakov–Lewis, SCS, and Sihag) and two semi-empirical models (Horton and Mishra–Singh). Model performance was evaluated using the coefficient of determination (R²), root mean square error (RMSE), mean absolute deviation (MAD), and mean absolute percentage error (MAPE).The results indicated that the Kostiakov–Lewis model exhibited the best overall performance for all three texture classes, particularly in fine-textured soils (R²= 0.999, MAPE= 3.05%). The Kostiakov model also showed highly accurate and stable performance, especially in coarse-textured soils (R²= 0.999, MAPE= 6.38%) and fine-textured soils (R²= 0.999, MAPE= 7.01%). In contrast, the Sihag model demonstrated the weakest performance. The semi-empirical Horton and Mishra–Singh models showed moderate performance. Overall, the findings of this study indicate that simpler empirical models, due to their straightforward mathematical structure and lower dependency on parameters, provided higher accuracy and were the most suitable models for simulating water infiltration in the semi-arid regions of the study area.
کلیدواژهها [English]
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