Rainfall interception in a moso bamboo (Phyllostachys pubescens) forest |
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Authors: | Yuka Onozawa Masaaki Chiwa Hikaru Komatsu Kyoichi Otsuki |
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Institution: | (1) Kasuya Research Forest, Kyushu University, 394 Tsubakuro, Sasaguri, Kasuya-gun, Fukuoka 811-2415, Japan |
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Abstract: | In recent years, moso bamboo (Phyllostachys pubescens) forest areas in Japan have rapidly expanded, and bamboo is now invading nearby natural or plantation forests. To date, only
one study has examined the rainfall interception of a moso bamboo forest. In that study, it was reported that the interception
ratio (interception/rainfall) of the bamboo forest did not exceed the interception ratios of other natural and plantation
forests (n = 4) in Japan. To expand the current state of knowledge about rainfall interception of bamboo forests, we measured throughfall
and stemflow at another bamboo forest site. Annual rainfall (Rf), throughfall (Tf), and stemflow (Sf) during the measurement period were 2,105, 1,556, and 322 mm, respectively. Annual rainfall interception at the plot (I) was 228 mm. Tf/Rf, Sf/Rf, and I/Rf were 73.9, 15.3, 10.8%, respectively. I/Rf was less than 20% throughout the year except in October, the month with lowest rainfall. We also summarized rainfall interception
data from 19 other natural and plantation forests. The I/Rf value of our site did not exceed the I/Rf values of these natural and plantation forests (n = 19). Our data will be useful for assessing changes in water resources that result from replacement of natural or plantation
forests by bamboo forests. |
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Keywords: | Bamboo Evapotranspiration Rainfall interception Water balance |
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