Time lag effects of rainfall inside a Platycladus Orientalis plantation forest in the Beijing Mountain Area, China Time lag effects and rainfall redistribution traits of the canopy of natural secondary Pinus tabulaeformis on precipitation in the Qinling Mountains, China Litter Interception Simulation of Pinus tabulaeformis Plantation on Loess Plateau Modeling canopy rainfall interception of a replanted Robinia pseudoacacia forest in the Loess Plateau Eco-hydrological effects of Qinghai spruce (Picea crassifolia) canopy and its influence factors in the Qilian Mountains