Nitrogen loss from tea orchards in the Three Gorges Reservoir Area (TGRA) will increase the risk of eutrophication in reservoir surrounding bodies of water. However, runoff and nitrogen loss from tea orchard slopes in response to rainstorm patterns have been rarely reported，especially on the interflow process. The study was conducted using simulated slopes containing soil collected from the slopes of tea orchards in the Lanlingxi watershed of the TGRA. Rainfall runoff processes were then monitored and recorded for three typical rainstorms (similar total rainfall volumes) in 2019 rainy season: rainfall concentrated towards the middle stage(MR), latter stage(LR) and early stage(ER) of the rainstorm. Results revealed that: (1) runoff and soil nitrogen loss characteristics differed significantly among these three rainstorm patterns, among which the ER rainstorm had the greatest runoff amount (58.45 L，83.06% and 54.38% higher than MR and LR, respectively), the greatest nitrogen loss load (623.99 kg·km⁻²，92.92% and 95.71% higher than MR and LR, respectively) and the greatest interflow proportion to total runoff (76.00%); (2) interflow is the primary process governing nitrogen loss in tea orchard slopes during rainstorms, more than 90% of the total nitrogen (TN) was lost with the interflow, and the nitrate nitrogen loss in the interflow accounted for more than 50% of the TN. (3) the nitrogen loss process differed significantly among the three rainfall patterns under rainstorm events, but the nitrogen loss load was mainly concentrated in the first half of the interflow. As such, reducing or delaying interflow generation or intercepting and collecting it during the interflow generation stage may better cope with the loss of soil nutrients under rainstorm or even extreme rainstorm events, lowering the risk of eutrophication for surrounding bodies of water.

三峡库区（TGRA）茶园氮素流失将增加库区周边水体富营养化的风险。然而，关于暴雨模式导致茶园坡面径流和氮损失的报道很少，特别是在互流过程中。该研究是使用从三峡地区兰陵溪流域茶园斜坡收集的土壤模拟斜坡进行的。然后监测并记录了2019年雨季3场典型暴雨（总降雨量相似）的降雨径流过程：降雨集中在暴雨的中期（MR）、后期（LR）和早期（ER）。结果表明：（1）这三种暴雨模式的径流和土壤氮素流失特征差异显着，^-2，分别比 MR 和 LR 高 92.92% 和 95.71%），并流占总径流量的比例最大（76.00%）；(2) 合流是暴雨期间茶园坡面氮素流失的主要过程，总氮(TN)的90%以上随合流损失，其中硝态氮损失占50%以上。 TN。(3)暴雨事件下三种降雨模式的氮流失过程差异显着，但氮流失负荷主要集中在交流的前半段。因此，减少或延缓合流产生或在合流产生阶段截取收集，可以更好地应对暴雨甚至极端暴雨事件下土壤养分的流失，