| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2011: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Research Abstract |
A traditional flood control technology in Saga Plain considering whole watershed countermeasures against floods has been evaluated quantitatively using geotechnical and hydraulic approaches to contribute to a future flood control management. In eastern Saga Plain, there is Jobaru River that includes discontinuous levees like Nokoshi and open levees. By geotechnical sampling of the soil, it has been found that sandy soils accumulate more at the location of auxiliary levee in the residential area near the discontinuous levee. By numerical simulations for inundation flows and sediment transports, there is a tendency of erosion near the auxiliary levee, while there is a tendency of accumulation in other areas. A soil sample of the location for the erosion area includes lens-like fine sand layer. Moreover, it has been found that large rivers' reroutings in Saga Plain are implemented to utilize it for warp soil dressing by water flow, water transportation, etc.
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