不同入渗水头对土壤水平一维入渗的影响

通过对不同入渗水头下的土壤累积入渗量及湿润锋进行分析,得出了累积入渗量与不同入渗水头以及湿润锋与不同入渗水头之间的变化规律,即随着入渗水头的增加,其累积入渗量和湿润锋在整体上有增加的趋势,但其增加的趋势并非像恒定水头时的土壤累积入渗量那样呈乘幂分布,而是具有一定的阶梯性,呈阶梯形增加。同时对其变化机理进行了探讨,旨在对蓄水坑灌条件下的土壤水分运动及入渗规律的进一步研究提供合理的参考依据。

Effect on Soil Horizontal 1D Infiltration of the Different Infiltration Head

Water storage pit irrigation method is a new method in saving water irrigation.The accumulated infiltration and wetting front in different infiltration heads were studied by horizontal column in this paper.The conclusions that varying mechanism of the accumulated infiltration and wetting front in different infiltration heads were drawn and discussed.Namely,with the increase of infiltration head,the accumulated infiltration and wetting front have increased tendency.But the increased tendency was not power distribution like constant head.They had certain ladder character and were indicative of the increase of ladder form.The research results will apply a reasonable reference value for studying further the soil moisture movement and infiltration law of water storage pit irrigation.