The eco-hydrological effects of north subtropical secondary bamboo forests(Phyllostachys edulis) were observed and studied in the forest ecosystem station of the Yangtze River delta.Results showed that(1) the ranges of canopy interception

stemfall

and throughfall were 0.21-4.55

0-105.88

and 0-2.8mm

respectively;the ranges of canopy interception ratio

stemfall ratio

and throughfall ratio was 1.3%-100%

0-96.3%

and 0-11.8%

respectively;annual canopy interception

annual stemfall

and annual throughfall were 171.7

864.78

and 74.3mm

respectively;annual canopy interception ratio

annual stemfall ratio

and annual throughfall ratio were 15.5%

77.9%

and 6.7%

respectively.(2) The canopy interception(ratio)

stemfall(ratio)

and throughfall(ratio) all had correlation with rainfall amount and rainfall intensity to different degrees and rainfall characteristics had the greatest influence on each link of rainfall redistribution.(3) The differences among rainfall redistribution effects of bamboo forest were significant in the different levels of rainfall amount and rainfall intensity.