Abstract: Based on interception process of forest canopy to rainfall, this paper derived a series of predictive interception models, including theoretical models, rainfall models, and seasonal models. Impact of last rainfall event on current interception loss was considered in these models. The concept of "interception per unit canopy area" was introduced, which might be helpful to compare interception abilities of different tree species, different developmental stages of one species, or the same stage/species in different climate conditions. At the end of this paper, the seasonal model has been tested with the data observed in plantations of Pinus tabulaeformis in Hebei province, northern China, and the calculated values fit quite well with the observed date.

Key words: Interception process, Interception model, Pinus iabulaeformis plantation