A soil‐water retention function that includes the hyper‐dry region through the BET adsorption isotherm

摘要: [1] Most existing full-range soil-water retention functions extend standard capillary pressure curves into the dry region to zero water content at a finite matric pressure. A description of dryness is commonly taken as oven-dry conditions given by suction about 109 Pa liquid saturation. However, no can be exerted amount water, so possibly more realistic situation necessarily implies that approaches zero, tends infinity. In this study we propose function takes advantage physical consistence Brunauer-Emmett-Teller (BET) adsorption isotherm describe very end, and preserves behavior classical Brooks Corey in wet range. The transition from mechanisms accounted for generalization Bradley's isotherm. Tests on seven widely studied soil data sets show experimental are well fitted proposed model. order test present approach, our simulations were compared data, transport under conditions, found literature. model was also with recently extended hypothetical experiment designed influence predicted humidity solute volatilization. These comparisons showed that, severe dryness, dynamics described Moreover, these determines humidity, which volatilization calculations sensitive.