In order to enhance the utilization rate of water resources, in especial the utilization rate of natural precipitation, the infiltration characteristics of soil moisture in three different types of vegetation in Changsha City were studied. The results showed that the infiltration rate of soil moisture in vegetation of tree, shrub and grasses and vegetation of artificial lawn all decreased with time pass, but the infiltration rate of soil moisture in bare land showed a huge fluctuation with time pass; the infiltration capacity of soil moisture, in three different types of vegetation had huge differences, the highest infiltration rate of soil moisture was in vegetation of artificial lawn, whose average infiltration rate within 70 min was 0.64 cm/min, the lowest infiltration rate of soil moisture was in vegetation of tree, shrub and grasses, whose average infiltration rate within 70 min was 0.21 cm/min.%为提高水资源特别是自然降水利用率,研究了长沙市区3种不同类型植被土壤水分入渗特征.结果表明,乔灌草与灌草、入工草坪两种植被土壤水分入渗率均随时间延长而减小,但裸地土壤水分入渗率随时间变化出现较大波动;3种不同类型植被土壤水分入渗能力差异较大,以入工草坪植被土壤水分入渗速率最大,前70 min的平均入渗率为0.64 cm/min,乔灌草与灌草植被土壤的为最小,前70 min的平均入渗率为0.21 cm/min.
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