Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
Online ISSN : 1884-7242
Print ISSN : 1882-2789
ISSN-L : 1882-2789
Research Papers
Kinematic Wave Model Modified by Including Infiltration and Groundwater Runoff and Its Application
Akihiro NAGAIHidetaka CHIKAMORI
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2016 Volume 84 Issue 1 Pages I_9-I_14

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Abstract

In this paper, kinematic wave model was applied to simulation of rainfall-runoff processes. The kinematic wave model has been usually used for calculating overland flow from rainfall excess that is residual of total rainwater after subtracting infiltration and evapotranspiration. The developed model simulates overland and groundwater runoff from total rainfall considering infiltration. That is, the developed model simultaneously simulates overland and groundwater runoff and infiltration. The model was applied to simulation of 34 floods' discharge with peak specific discharge of 0.6 - 18 m3s-1km-2 in six watersheds of various sizes (10 m2 - 1,717 km2) with different land cover. The results show that the developed model well simulates flood discharge for all objective floods. Simulation accuracy of channel flow of the developed model is comparable to that of a model with diffusion channel flow model in large catchments, which suggest advantage of kinematic wave channel model to diffusion model in balance between accuracy and simplicity.

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© 2016 The Japanese Society of Irrigation, Drainage and Rural Engineering
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