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- 水野 秀明
- 国土交通省土木研究所砂防研究室
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- ボボリン ヴィットリオ
- サレルノ大学工学部土木工学科
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- 南 哲行
- 建設省土木研究所砂防研究室 現:国土交通省河川局砂防部砂防課
書誌事項
- タイトル別名
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- Study on effectiveness of reducing peak discharge of muddy debris flow with open type dams
- トウカガタ サボウ ダム ニ ヨル デイリュウガタ ドセキリュウ ノ ピーク リュウリョウ ゲンショウ コウカ ニ カンスル ケンキュウ
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Flume experiments were done to clarify the degree an open check dam lowers peak discharge of a muddy debris flow and a method of estimating the necessary conditions and anticipated discharge rate reduction were proposed. The mixture of sediment and water was set so the simulated muddy debris flow would maintain Froude similarity with the May 1998 debris flow near Sarno, Italy. The flume was 20 cm wide, 40 cm deep, and 500 cm long, and it was set at two different slopes of 5° and 10° . The wooden dam models included three slit types with widths of 5 cm, 10 cm, and 15 cm and three square conduit types with sides of 5 cm, 10 cm, and 15 cm. After the sediment and water were mixed for 6 minutes with two electric drills equipped with a special propeller in the upstream space from a gate, the gate was opened manually to create a muddy debris flow in the flume. Sampling boxes on a roller at the bottom end continuously collected the muddy debris flowing from the dam models. Both the slit and conduit dams lowered the peak flow volume. The smaller the dam dimensions, the lower the peak discharge rate. Surges were observed forming upstream from the dam models. Equation of continuity, momentum equation, and energy equation for positive surge obtained equations representing the surge formation conditions and discharge rate. Their application to the experimental results showed that the calculated values generally reproduced the test results.
収録刊行物
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- 砂防学会誌
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砂防学会誌 53 (6), 45-54, 2001
Japan Society of Erosion Control Engineering
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詳細情報 詳細情報について
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- CRID
- 1390282679044646016
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- NII論文ID
- 10007512032
- 10007680498
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- NII書誌ID
- AN0012035X
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- NDL書誌ID
- 5709534
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- ISSN
- 02868385
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可