Canopy interception (Ic) of rainwater is an important component of hydrological cycles, and its measurement and modeling are essential for understanding water balances and formulating scientific strategies of management in different ecosystems. Large areas of traditional agricultural crops have been replaced with apple orchards in the Yellow River Basin, while few studies were conducted to quantify and model canopy interception for apple orchards with different ages. In this work, we measured rainfall, stemflow and throughfall and calculated Ic for young and mature apple orchards from May to September 2013–2016 in Changwu County on the Loess Plateau in the Yellow River Basin. The revised Gash model was applied to the two orchards. The results revealed that annual Ic for the young (range 22.2–29.2 mm) and mature (range 26.8–39.7 mm) orchards varied between years. During the past four years, cumulative modeled Ic was 7.6 ± 1.0 and 10.5 ± 0.9% higher than cumulative measured Ic for the young and mature orchards, respectively. Evaluation parameters the mean root mean square error and bias values (0.1719 mm and 0.0372 mm, respectively) between the measured and modeled Ic implied that the revised model performed better for the young orchard. For both orchards, the revised model was most sensitive to the ratio of mean evaporation rate to mean rainfall intensity and canopy storage capacity each year. The good agreement between the measured and modeled Ic indicated that the revised model was suitable for predicting Ic for apple orchards with different ages under our climatic conditions or similar conditions.

雨水的树冠截留（Ic）是水文循环的重要组成部分，其测量和建模对于了解不同生态系统的水平衡和制定科学的管理策略至关重要。黄河流域大面积的传统农作物已被苹果园所取代，而对不同年龄苹果园的冠层截留进行量化和建模的研究较少。在这项工作中，我们测量了 2013 年 5 月至 2016 年 5 月至 2016 年 9 月在黄土上的昌武县年轻和成熟苹果园的降雨量、茎流和通过黄河流域高原。修改后的 Gash 模型应用于这两个果园。结果表明，年轻果园（范围 22.2-29.2 毫米）和成熟果园（范围 26.8-39.7 毫米）的年度 Ic 因年份而异。在过去四年中，年轻果园和成熟果园的累积模拟 Ic 分别比累积测量 Ic 高 7.6 ± 1.0 和 10.5 ± 0.9%。评估参数，测量和模拟 Ic 之间的均方根误差和偏差值（分别为 0.1719 毫米和 0.0372 毫米）暗示修正后的模型对年轻果园表现更好。对于这两个果园，修正后的模型对平均蒸发率的比率最为敏感来表示每年的降雨强度和冠层蓄水量。实测 Ic 与模拟 Ic 吻合良好，表明修正后的模型适用于在我们的气候条件或类似条件下预测不同年龄苹果园的 Ic。