Abstract Forest thinning is an important management strategy for altering the hydrological function of forests by redistributing of incident rainfall, and improving the capacity to store water on forest floor and in the soil. A study to analyze the water conservation functions of the forest canopy and forest floor was conducted on a 36-year-old Larix principis-rupprechtii plantation with different thinning treatments in the Taiyue Mountain of Shanxi Province. The results showed that the cumulative values of throughfall (TF) gradually increased with thinning intensity, whereas the cumulative values of stemflow (SF) and interception loss (Ic) decreased significantly. More importantly, the study revealed that combining Ic and interception loss of litter (Il) yields a total interception flux of 21.9%, 24.5%, 23.8% and 19.7% of GR during the growing season in control, lightly thinned, moderately thinned, and heavily thinned respectively. Surface runoff as a proportion of GR varies tremendously depending on the amount and intensity of rainfall. Our findings demonstrated that rainfall redistribution through the forest canopy and litter and the potential for surface runoff responded to thinning intensity independently of each other. The intensity of management and plant-mediated biological processes are of particular importance in evaluating the impacts of forest management on hydrological processes in forests.

中文翻译：

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森林间伐对落叶松人工林生长季截留和地表径流的影响

摘要 森林间伐是通过重新分配降雨来改变森林水文功能和提高森林地面和土壤蓄水能力的重要管理策略。对山西省太岳山36年生落叶松人工林进行了不同间伐处理的林冠层和林地水源涵养功能分析。结果表明，随着间伐强度的增加，通过流量（TF）的累积值逐渐增加，而茎流（SF）和截留损失（Ic）的累积值显着下降。更重要的是，研究表明，结合 Ic 和垃圾截留损失 (Il) 可产生 21.9%、24.5%、23.8% 和 19 的总截留通量。生长季 GR 的 7% 控制，分别为轻度变薄、中度变薄和重度变薄。地表径流占 GR 的比例根据降雨量和强度的不同而有很大差异。我们的研究结果表明，降雨通过森林冠层和枯枝落叶的重新分布以及地表径流的潜力对变薄强度的响应相互独立。管理强度和植物介导的生物过程对于评估森林管理对森林水文过程的影响尤为重要。我们的研究结果表明，降雨通过森林冠层和枯枝落叶的重新分布以及地表径流的潜力对变薄强度的响应相互独立。管理强度和植物介导的生物过程对于评估森林管理对森林水文过程的影响尤为重要。我们的研究结果表明，降雨通过森林冠层和枯枝落叶的重新分布以及地表径流的潜力对变薄强度的响应相互独立。管理强度和植物介导的生物过程对于评估森林管理对森林水文过程的影响尤为重要。