SYNTHETIC OBSERVATION ON ROCKY MUDFLOW Part 1. Planning of New Observation System for Mudflow and Field Test at Eastern Slope of Mt. Yake in 1970

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  • 土石流の総合的観測 その1.土石流計測システムの開発と焼岳東麓における1970年の実測例
  • 土石流の総合的観測-1-土石流計測システムの開発と焼岳東麓における1970年の実測例
  • ドセキリュウ ノ ソウゴウテキ カンソク 1 ドセキリュウ ケイソク システム ノ カイハツ ト ヤケダケ トウロク ニ オケル 1970ネン ノ ジッソクレイ

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Abstract

A new observation system for rocky mudflow was designed by the Mudflow Research Group.The system consists of a detector on mudliow arrival and automatic switch circuit for VTR, 35mmcamera and firing of flare tube in order to record the state of moving mudflow. In addition to thissystem, rain gauges and water level recorder are necessary for the survey of hydrological characterin a small mountaineous basin. During last summer in 1970, the observation system and hydrolo-gical survey instruments had been set along Kamikamihori valley at eastern slope of Mt. Yake andtested in regard to the practical effectiveness. The front velocity (1-5 m/see) of mudflow wasmeasured correctly from the record obtained by the new system.

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