CAJ | 학술논문

降雨入渗过程中土壤内空气压力的变化影响到土壤的入渗能力，当包气带气压大于地球表面大气压后会对入渗水流起到顶托的作用。本文根据包气带气压变化的观测结果理论分析了包气带气体运动的一般规律，并以此为依据假设气体外逸函数，然后推导土壤包气带中气压变化的计算公式，并通过模拟分析比较了考虑包气带气压前后入渗过程：均匀降雨条件下考虑包气带气压后开始积水时间提前，入渗率平均减小27％，有时减小程度可达32％；渗透总量在降雨初期差别很小，但到压缩外逸阶段后差别变大，时间越长，包气带气压的减渗作用愈显著，两者相差越大，24h入渗总量平均减小约20％。
강우입삼과정중토양내공기압력적변화영향도토양적입삼능력，당포기대기압대우지구표면대기압후회대입삼수류기도정탁적작용。본문근거포기대기압변화적관측결과이론분석료포기대기체운동적일반규률，병이차위의거가설기체외일함수，연후추도토양포기대중기압변화적계산공식，병통과모의분석비교료고필포기대기압전후입삼과정：균균강우조건하고필포기대기압후개시적수시간제전，입삼솔평균감소27％，유시감소정도가체32％；삼투총량재강우초기차별흔소，단도압축외일계단후차별변대，시간월장，포기대기압적감삼작용유현저，량자상차월대，24h입삼총량평균감소약20％。
Air pressure change in the rainfall infiltration in the soil affect the soil infiltration capacity, infiltration of water when the air pressure in the vadose zone is greater than the Earth＇s surface atmospheric pressure plays the role of the backwater. Theoretical analysis of general laws of the air movement in the vadose zone was given according to the observations of air pressure change in the vadose zone , which was a basis for assuming the air escaping function and deriving the formula of the air pressure change. And then the impact on the infiltration was simulated considering the vadose zone pressure change. Under the uniform rainfall conditions, the start time of the water accumulating was shifted earlier and the average infiltration rate was reduced by 27%, sometimes up to 32%; the difference of total penetration was little in the early time of rainfall , but became great at the period of compression escape and the difference was greater when the reduction of infiltration became more significant and longer,, the total infiltration for 24 hours average reduced by about 20%.