Analysis of estuarine morphodynamics and coastal sediment budget using big data

2016 Fiscal Year Final Research Report

• Project/Area Number: 26820201
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: Toyohashi University of Technology
• Principal Investigator: OKABE Takumi 豊橋技術科学大学, 工学(系)研究科(研究院), 助教 (50464160)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ビッグデータ / 総合的土砂管理 / 海底地形 / 河口 / 小型漁船 / 地形モニタリング

Outline of Final Research Achievements

To clarify the characteristics of estuarine morphodynamics and regional sediment budget, it is necessary to monitor bathymetry frequently and persistently. This study focused on the morphologic changes in estuaries and an inlet in Enshu-nada coast, Japan, at several temporal scales. The longshore sediment transport was also evaluated. The bathymetric information was collected from multiple small fishing vessels. The position and depth of the vessel during operation were acquired with a GNSS antenna and fish finder, respectively. An assessment of the bathymetry monitoring data in the mouth of Tenryu River showed the trend of erosion in the delta. In Imagire-guchi inlet, the bathymetries of the ebb-tidal delta revealed several reversals of the trends and various rates of accretion or erosion in the terminal lobe. The regional sediment budget in the coast was evaluated by the bathymetric changes along 50 km of the shore, and this spatial feature indicated the recent morphologic situation.

Free Research Field

海岸工学