| Autor: |
Usowicz, Bogusław, Lipiec, Jerzy, Siczek, Anna |
| Předmět: |
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| Zdroj: |
International Agrophysics; 2024, Vol. 38 Issue 4, p373-382, 10p |
| Abstrakt: |
Soil hydraulic parameters are a key input for predicting soil water retention curves and water flow. The van Genuchten model is widely used to fit the van Genuchten hydraulic parameters including residual water content, saturated water content, a fitting parameter related to the inverse of the air entry pressure, and the shape parameter. This study aimed to show the interrelations of the soil hydraulic parameters on a large scale with both the inherent soil properties and the genetic type. The measured van Genuchten parameters originated from soil water retention curves determined in 100 pedons at 4 depths corresponding to the main soil diagnostic horizons. The results showed that the effect of soil texture on the van Genuchten hydraulic parameters was greater than that of the genetic soil type. The van Genuchten hydraulic parameters were in general significantly higher in fine-textured than coarse-textured soils. The vertical distribution of the hydraulic parameters was more discontinuous in fine-than in coarse-textured soils. The van Genuchten equation fits well to measured soil water retention (R2 > 0.885) and thereby can predict the soil water retention curve for a variety of soils with acceptable uncertainty and improve soil water conservation on a large regional scale. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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