Influence of Saline Pore Fluid on Soil Behavior during Evaporation

Saline conditions govern soil behavior during evaporation, thereby affecting the water budget in semi-arid regions. This research examined effects of saline pore fluid on evaporation. The results indicated volumetric reductions about 5% for silty sand and 15% lean clay. evaporative flux decreased from 26 mg/m2∙s to 22 StageII, remained at a constant StageIII, 13 StageIV. air entry residual suction values were found be 5 kPa 100 kPa, respectively, total 5000 merged with matric near Stage II/Stage III boundary. swell–shrink curve (SSC) was J-shaped only void ratio decrease II. In contrast, clay 30 15 10 then 2000 II ranged 1000 6000 an average value 3500 kPa. SSC showed major II, marginal III, no IV. Under high demand, 180 StageIII 50 IV, whereas it 230 145 95 25 For both soils, loss six times higher than that under low demand.