| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2011: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
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| Research Abstract |
Predictions have shown that climate change may increase the occurrence of large storms and consequently increase the frequency and magnitude of floods in the Japanese archipelago. We have to be able to predict the vast increase in water and sediment discharge during large storms at mountain area which consist more than 60% of Japanese land. The objective of our study was A) to obtain discharge, water depth and velocity during storms at mountain channel and B) to clarify the relationships between hydraulics and channel morphology during flood at mountain channels. We showed that at mountain channel, water level rise was quick and large but flow velocity does not increase as much. Hydraulic characteristics were different between step and pool during low flow. During large storm, however, hydraulics became depending on morphology of whole channel including step and pool. New survey methods for submerged channel bed using green wavelength terrestrial laser scanner was developed.
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