提出了耦合HYDRUS-1D与蓄水层蒸发模块的绿色屋顶模型,基于绿色屋顶试验和水文监测数据对模型进行了率定及验证,利用该模型分析了深圳市不同雨强、雨前干旱时间(ADP)和水文年下,蓄水层对绿色屋顶径流削减能力的影响。结果表明,随着次降雨强度的增加,绿色屋顶径流削减量先增加,在达到最大值后保持稳定,蓄水层厚度的增加可以显著提高绿色屋顶的最大径流削减量;随着ADP的增加,绿色屋顶对下次降雨径流的削减能力逐渐恢复,由于蓄水层蒸发对土壤层的补水作用,带蓄水层屋顶的径流削减能力恢复的速度远慢于无蓄水层屋顶;绿色屋顶对年径流削减量:枯水年<平水年<丰水年,且随蓄水层厚度的增加而增加。 A green roof model coupling HYDRUS-1D and aquifer evaporation module is proposed. Based on the green roof test and hydrological monitoring data, the model is calibrated and verified. The model is used to analyze the effects of different rainfall intensity and drought time ADP) and the impact of aquifers on green roof runoff reduction during the Hydrological Year. The results showed that with the increase of rainfall intensities, the reduction of green roof runoff firstly increased and then stabilized after reaching the maximum value. The increase of aquifer thickness can significantly increase the maximum green roof reduction. With the increase of ADP, The ability of the green roof to reduce the next rainfall runoff is gradually restored. Due to the effect of aquifer evaporation on the soil layer, the runoff reduction capacity of the aquifer roof is much slower than that of the non-aquifer roof; Runoff reduction: dry years