Using effective moisture content to predict sorptivity
Аннотация
Background. Soil sorptivity is a critical hydraulic property governing early-stage infiltration though it is difficult to measure it directly in field conditions. Effective moisture content (Se) is a more accessible hydraulic parameter that may serve as a proxy.
Purpose. This study aimed to evaluate the potential of effective moisture content, measured at a tension of 336 cm water, to predict soil sorptivity across varying soil textures in semi-arid northern Iraq.
Materials and methods. Eight soil samples (sandy clay loam to clay) were collected from Nineveh Province. Effective moisture content was calculated from saturated and residual moisture measurements. Sorptivity was determined assuming both spherical and cubic aggregate geometries.
Results. Effective moisture content at 336 cm water showed a strong linear relationship with sorptivity (R² = 0.94 for spherical aggregates). Clay content was the dominant factor influencing both parameters. The spherical aggregate assumption produced higher and more representative sorptivity values compared to cubic geometry.
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Литература
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