土壤入渗中气相对水流运动影响的研究

The influence of soil air phases in infiltration on soil water current

土壤孔隙中的流体包括土壤空气和水分两部分 ,由于地面积水限制了土壤空气的排出而使得土壤空气被禁锢 ,被禁锢的土壤空气阻碍水流运动。恒定土壤空气压力对累积入渗水量的影响约为 0 .4 %～ 3% ;到入渗稳定阶段 ,湿润土壤区域水分含量相差 1.5 %。正常入渗不同于恒压入渗情况 ,12 0 min时 ,禁锢土壤空气压力的减渗量约为 16 %。

The current of soil small opening consist of air and water. But,it entrapment the soil air that the water layer restrict the soil air discharge on the grand. The entrapment of soil air block the water moves. The soil air stable pressure effected infiltration and moist van developed speed about 0.4%～3%. Arrived steady infiltration,the moist area water content difference 1.5%. In general infiltration 120min,the soil air entrapment decreased the water 16% of infiltration.\;