The structural porosity in soil hydraulic functions - a review.

摘要: Products of biological processes are the dominant factor soil structure formation in A horizons, while B horizons their role is less expressed. Soil influences dominantly structural domain pore system bimodal soils thus affecting hydraulic functions. The form functions depends upon size distribution and generally configuration system. We used derived for lognormal modified them to bi-modal soils. equations were tested by experimental data catalogued procedure leads separation two mutually different domains matrix pores. value pressure head (potential) separating not constant varies a broad range. For each we obtained its water retention function unsaturated conductivity function. key problem solution preferential flow controlling lateral between domains. Water fully physically based still keeps fitting parameters, too. Their simple relationship tortuosity pores connectivity was confirmed. Since they differ substantially domains, suppose that there exists great difference porous systems use uniform parameters whole range justifiable.