Estimation of litter interception in the Cryptomeria japonica and Lithocarpus edulis plantation stand

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  • スギ林およびマテバシイ林におけるリター遮断量の推定
  • スギバヤシ オヨビ マテバシイリン ニ オケル リター シャダンリョウ ノ スイテイ

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Abstract

A numerical model to evaluate the effect of forest floor moisture dynamics in the Cryptomeria japonica and Lithocarpus edulis plantation stand was developed. This model enabled to simulate the litter interception and evaporation rate under the different rainfall conditions and different accumulation structures of the litter layer. To estimate the litter interception characteristics under the various rainfall conditions, two model parameters, S_max(Maximum water storage capacity) and L_i(Interception storage capacity under the rainfall conditions), were estimated by the laboratory experiments. Evaporation rates from the litter layer during the dry periods were estimated by the lysimeter observations conducted in each stand. The result of model simulation showed good agreement with the field observation and also indicated that hydrological significance of the litter interception process.

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