Comparison of Forest Canopy Interception Models Combined with Penman-Monteith Equation.

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dc.contributor.authorMulungu, Deogratias M. M.
dc.contributor.authorShiiba, Michiharu
dc.contributor.authorIchikawa, Yutaka
dc.date.accessioned2016-07-18T07:38:17Z
dc.date.available2016-07-18T07:38:17Z
dc.date.issued2002
dc.description.abstractThree models of interception process: Rutter model with Deardorff's power function, Deardorff model and Modified Kondo model, each in combination with Penman-Monteith equation applied to the same climatic forcing over the year of simulation were compared. The modification of the Kondo's model done in our study includes the water balance component, between storms evaporation and transpiration including the power function, storage changes and the canopy drainage. The comparison was meant for assessing the simple Modified Kondo model developed in Japan and demonstration of the importance of the power function. The Penman-Monteith equation was the kernel for determination of evaporation and transpiration rates. Its use in this study was proposed because it has been widely used in Japan and in experimental sites and therefore can be used as a basis for comparison. Since much interest was on net rainfall, the control volume for the water accounting was between top of the canopy and above the ground surface and hence does not include soil moisture and transpiration. Results showed that forest canopy evaporation ranged from 22 to 29% of gross rainfall. Much model prediction differences were observed in winter, with lower rainfall intensity where wet canopy storages or rainfall did not meet the potential (atmospheric) evaporation demand. The annual net rainfall and transpiration ranged from 71 to 78% of gross rainfall and from 727 to 733 mm respectively. The adopted power function had significant impact on transpiration rate and small impact on evaporation rate for the Modified Kondo model. The Modified Kondo model predicted fairly close to the two models and therefore can be used for providing hourly input into hydrological models. The differences in the predicted hydrological fluxes resulted from the different model for mulations especially throughfall coefficients and drainage functions.en_US
dc.identifier.citationMulungu, D. M., Shiiba, M. and Ichikawa Y., 2002. Comparison of Forest Canopy Interception Models Combined with Penman-Monteith Equation. 水文・水資源学会誌, 15(6), pp.555-568.en_US
dc.identifier.doi0.3178/jjshwr.15.555
dc.identifier.urihttp://hdl.handle.net/20.500.11810/3239
dc.language.isoenen_US
dc.subjectPenman-Monteith equationen_US
dc.subjectClosed forest canopyen_US
dc.subjectLAIen_US
dc.subjectEvaporationen_US
dc.subjectTranspirationen_US
dc.subjectCanopy water balanceen_US
dc.subjectHikimi River basinen_US
dc.subjectJapanen_US
dc.titleComparison of Forest Canopy Interception Models Combined with Penman-Monteith Equation.en_US
dc.typeJournal Article, Peer Revieweden_US
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