Evergreen broad-leaved forest is well-preserved

and is playing an irreplaceable role in water conservation and ecological regulation in forest areas in Mid subtropical zone. In order to investigate the canopy interception and allocation and evaluate forest hydrological function and benefit of the evergreen broad-leaved forest in mid subtropical area quantitatively

positioning experiments were implemented during two rainy seasons of from 2016 to 2017 in Mopan Mountain national nature reserve. The amount of throughfall

stemflow and precipitation were measured and interception loss was subsequently calculated. Based on the observations of 26 rainfall events

canopy interception process of evergreen broad-leaved forest was simulated using the modified Gash model. The results showed that most of the observed rainfall had the low intensity

low duration and moderate rain. The amount of rainfall

throughfall

trunk flow and canopy interception were 994.07 mm

562.90 mm

16.90 mm and 406.40 mm

respectively

during the study period. According to the modified Gash model

the simulated amounts of throughfall

stemflow and canopy interception were 548.63 mm

21.75 mm

403.28 mm

respectively

and their relative error were 2.60%

22.29% and 3.34% respectively compared to the measured. The results of sensitivity analysis showed that the sequence of simulated results of canopy interception from large to small was c

S

St

Pt.