Soil Water Retention Curves as Affected by Water Repellency

• 作 者: HuiLiu[1]TushengRen[1]ZhaoqiangJu[1]J(o)rgBachmann[2]
• 机 构: Department of soil and water,China Agricultural University,Yuanmingyuan Xi Lu,No.2,100094 Beijing,Ch
• 出 处: 第五届京区地理学研究生学术论坛
• 发表日期: 2010年期

　　Soil wettability impacts soil hydrology.Soil becomes water repellent when the solid particles are covered with hydrophobic organic coatings.Although it is recognized that water repellency impacts soil hydraulic properties, it is still uncertain how water repellency influences soil water retention curves (SWRC).In this study, we measured the desorption SWRC (pF 0-4.2) and the main drying and wetting hysteresis loop (pF =0-2.0) with a pressure plate and a sand box, respectively, for hydrophobic sand, loam and silt loam and their paired hydrophilic counterparts.