Author(s): Koji Ohashi; Tadashi Hamada

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Abstract: The authors describe the methods and results of the ice-covered river flow measurements carried out in the streams with a comparatively small catchment area on Hokkaido, Japan. They study the interrelationship between velocity distri­bution, irregularities in the cross-sectional form, and roughness coefficient of stream flow under the ice cover, and assume that roughness of the underside of the ice cover depends upon the hydraulic and climatic conditions as well as the form effect of the river section. The necessity of conducting further field measurements is emphasized, to establish the correlation prescribing roughness factor under the ice cover.

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Year: 1970