扇状無堤河川に築堤する場合の堤防法線と河岸侵食防御工の実験とその考察

抄録

There have been limited experiences on the technology of new embankment works at braided alluvial fan rivers for flood control. Therefore, the detailed design should be done carefully and precisely considering the river characteristics. In the detailed design for the Cura/Labugaon River in the Laoag River Basin, Philippines, appropriate dike alignment, type and layout of bank protection works have to be decided to take sand bar formation into account. For this purpose, movable bed hydraulic model test, which covers the entire reach of the proposed river improvement works was conducted to study sand bar development, scouring, and the resultant critical reaches, as well as to study the facility design in terms of dike alignment and layout of spur dike for bank protection. This paper presents a practical engineering process to decide the appropriate dike alignment, type and layout of bank protection works for the braided primitive alluvial fan river, which we cannot experience any more in Japan at present.