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为研究初始含水率和降雨强度对土壤入渗性能的影响,采用径流-入流-出流法和双环入渗法测量比较,采用不同降雨强度(204、0和60 mm/h)和3种土壤含水率(2.60%1、0.4%和19.5%)进行试验比较。结果表明:土壤入渗性能随着降雨强度的增加而降低,随着初始含水率的增加而降低;双环法测量的土壤初始入渗率随着含水率增加而增加,稳定入渗率则随着含水率的增加而降低。同时,通过Kostiakov、Horton和Philip入渗模型对试验结果进行回归分析,径流-入流-出流法测量结果均优于双环法测量结果,而且Horton入渗模型回归结果优于其他入渗模型。
In order to study the effects of initial moisture content and rainfall intensity on soil infiltration performance, the effects of different rainfall intensities (204, 0 and 60 mm / h) and three kinds of soils Moisture content (2.60% 1, 0.4% and 19.5%) were tested for comparison. The results show that the infiltration capacity of soil decreases with the increase of rainfall intensity and decreases with the increase of initial moisture content. The initial soil infiltration rate increases with the increase of water content and the steady infiltration rate increases with the increase of rainfall intensity Moisture content decreases. Meanwhile, Kostiakov, Horton and Philip infiltration models were used to conduct regression analysis of the test results. The results of runoff-inflow-outflow method were better than those of the bicyclic method, and the regression results of Horton infiltration model were better than other infiltration models.