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発表 Booming three-dimensional planning for river restoration

作成年度 2019 年度
論文名 Booming three-dimensional planning for river restoration
論文名(和訳)
論文副題
発表会 6th biennial symposium of the international society for river science(第6回国際河川科学学会隔年シンポジウム)
誌名 6th biennial symposium of the international society for river science(第6回国際河川科学学会隔年シンポジウム)
巻・号・回 9 
発表年月日 2019/09/08 ~ 2019/09/13
所属研究室/機関名 著者名(英名)
河川生態チーム中村圭吾
抄録
River restoration demands the three-dimensional data for its complex nature. A survey using UAV and Lidar made it possible to acquire detailed river morphological data. In particular, Airborne Lidar Bathymetry (ALB) opened new possibility because of the ability measuring under the water by green laser. In Japan, more than 30 rivers have already applied ALB for river surveys. Practitioners started to use ALB data for planning and river management. For river works, intelligent construction machines have become widespread in Japan since the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) started CIM initiatives (BIM for infrastructure), which means construction information modeling/management (CIM). The CIM initiatives started from the fiscal year 2012 to solve labor shortage and to improve construction productivity. These intelligent construction machines enable to curve complicated river morphology efficiently using three-dimensional (3D) data. As the result, 3D design is becoming issues to bridge the gap between Lidar surveys and river works. For 3D design, we developed RiTER (River Terrain EditoR) series consisting of RiTER Xsec (cross-section) and RiTER 3D based on iRIC software. The iRIC software is free numerical simulation of flow and morphodynamics in rivers. RiTER Xsec is 2D-based river design software, which creates 3D data from 2D-based design automatically. RiTER 3D is 3D-based software which is still in developing stage. Additionally, EvaTRiP has produced to evaluate mainly fish habitat of the river based on 3D data. Using these software and 3D data, we try to conserve and restore the nature of rivers from urgent river works even after severe flood disasters. In my presentation, I would like to introduce the new trend of river restoration in Japan as mentioned above.
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