Abstract The litter interception of rainfall have great effect on the water balance in the hydrological process, especially for the process of infiltration and runoff. Infiltration plays a significant role in soil erosion, evapotranspiration, and overland flow. Runoff generation is a main component of the hydrological cycle, and the simulations of soil moisture can improve infiltration process modeling. And hillslope is the basic unit of hydrological response and the key place of hydrological process. It is also the basis of distributed hydrological simulation to explore and understand the hillslope scale rainfall infiltration and runoff generation. A hillslope infiltration-runoff model in mountain area was established, including vegetation and litter interception. Field experiments on runoff yield and confluence of natural precipitation were carried out for model verification, and the simulation results of the present model were compared and analyzed with that of existing hillslope infiltration-runoff models. The results show that compared with existing models, the model proposed in this study can well simulate the runoff and infiltration amount, and the measured values are in good agreement with the simulated ones. However, during storm periods, the simulated infiltration rates are far less than the measured ones. A possible reason is that fragments in soils may cause the formation of fast flow paths in the earth-rock interface，which is neglected in the present model. This model needs to be further refined and improved to consider the priority flow paths inside the soil layers in the hillslope.

中文翻译：

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凋落物覆盖对森林生态系统层状土壤山坡尺度入渗径流模式的生态水文效应

摘要 降雨的枯枝落叶截留对水文过程中的水平衡影响很大，特别是对入渗和径流过程。入渗在土壤侵蚀、蒸散和地表径流中起着重要作用。径流生成是水文循环的主要组成部分，土壤水分模拟可以改进入渗过程建模。而山坡是水文响应的基本单元，是水文过程的关键场所。也是探索和了解山坡尺度降雨入渗和产流的分布式水文模拟的基础。建立了山区山坡入渗-径流模型，包括植被和凋落物截留。进行了径流产流和自然降水汇流的田间试验，对模型进行了验证，将本模型的模拟结果与现有山坡入渗-径流模型的模拟结果进行了对比分析。结果表明，与现有模型相比，本文提出的模型能够很好地模拟径流和入渗量，实测值与模拟值吻合较好。然而，在风暴期间，模拟入渗率远低于实测值。一个可能的原因是土壤中的碎屑可能导致土石界面形成快速流动路径，本模型忽略了这一点。该模型需要进一步细化和改进，以考虑山坡土层内部的优先流动路径。