江戸川流頭部の河道計画の策定　―先導的な数値解析を中心とした新しい河道設計技術ー

抄録

Comprehensive flood observation around the diversion of the Edo River was conducted for the purpose of figuring out the flood phenomena. Temporal data of water levels and discharge rates were measured at many observation points during September 2007 flood. The cross-sectional bed forms were surveyed before and after the flood. Next, the quasi-3D unsteady flood flow and 2D bed variation analysis model using the observed temporal changes in water surface profiles was applied to the Edo River channel planning. On the other hand, local velocity distributions and water surface profiles were measured particularly in large scale hydraulic model experiment. Then the improvement design of the diversion of the Edo River was developed using a new river design technique centering on the leading numerical analysis.