著者

松岡 保正

出版者

長野工業高等専門学校

雑誌

長野工業高等専門学校紀要 (ISSN:02861909)

巻号頁・発行日

no.29, pp.27-36, 1995

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There lie two quiescent volcanoes and three canyons in the basin of the Torii River. In time of heavey rainfall, driftwoods and gravels are produced in theese areas. Sometimes they cause hydrospheric disaster. On the other hand, these areas are kept in reratively good condition. So we must pay due regard to natural river ecosystems. A good cooperation between engineers, ecologists, and similar experts paired with the work of good service team is essential to water resources management and maintainance.