| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
The design of the confluence is one of the most difficult aspects of the implementation of a compound channel which is widely adopted in rivers on alluvial plains. In this project, we proposed a practical method of flow analysis for the designing of confluence channels by combining the technique of stereo image analysis of the aerial photographs of flood flow and the quasi-3D shallow water simulation model with unstructured triangular mesh system. The drag force of the tree communities was also taken into consideration based on the results of a field survey.
The method was applied to the flood flow occurred in the confluence of the Tone River and Watarase River. The stereo image analysis showed the detailed surface flow characteristics. The quasi-3D flow simulation reproduced the surface flow successfully, and revealed the three dimensional flow characteristics under the water surface which are useful for the design of river confluence.
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