Natural stable river section design using FLUVIAL-12

Abstract

Sediment transporting capacity, curvature effects as well as composition of channel bed and bank materials need to be considered by the engineer during the design process of natural channels. Neglecting these effects would normally result in instability problems because channel morphology usually changes with time. Mathematical model (FLUVIAL-12) has gradually become popular in designing stable sections because it is more economical compared to physical model. The model is capable of predicting instability effects such as riverbed changes due to erosion and sedimentation during flood, thereby providing the necessary information for the design or bank protection work. In this paper, the application of FLUVIAL-12 for Raia River shows that the study reach can be preserved to its natural characteristics provided that the river bank should be covered with natural protection which produce the flow resistance to the value of Manning’s n = 0.045.