Abstract:Rainfall redistribution in a forest is an important ecohydrological process that influences the biogeochemical cycling of the ecosystem. The purpose of this study was to investigate rainfall redistribution patterns and its influencing factors in two temperate deciduous forests in northeastern China. The forest types were Mongolian oak (Quercus mongolica Fisch.) forest and mixed deciduous forest (i.e., no dominant tree species). We continuously measured the rainfall, throughfall and stemflow of the two stands from May to October of 2012. The mean ratios of throughfall, stemflow and interception to rainfall for Mongolian oak forest were 76%, 7% and 17%, respectively; while those for the mixed deciduous forest were 85%, 5% and 10%, respectively. Throughfall occurred when the rainfall exceeded 1.0 mm and 0.7 mm for the Mongolian oak and mixed deciduous stands, respectively. Stemflow occurred when the rainfall exceeded 3.0 mm for both stands. The stemflow amount increased significantly with diameter at breast height (DBH) increasing when the rainfall exceeded 5.6 mm, but an opposite trend occurred when the rainfall was below this threshold. The amount of throughfall, stemflow and interception all increased significantly with rainfall increasing, while their ratios to rainfall showed different trends. The spatial variability in throughfall decreased significantly with the amount and intensity of rainfall increasing. We concluded that the rainfall redistribution patterns of these two stands varied as a result of the differences in their canopy structure and responses to various rainfall characteristics (i.e., rainfall amount, rainfall intensity).