Study on channel works considering ecological conservation

Abstract

Some aspects of present channel works are evaluated from the viewpoint of conservation of ecology. The fundamental theory needed to be considered for river management and conservation of ecology, during the planning of channel works have been described.
The following investigations were carried out. 1) The present methods of planning and construction of channel works are reviewed. 2) Based on data analysis of presently existing channel works and hydraulic experiments, the influence of cross dykes on the formation of sand bar was evaluated. 3) The effect of size of wing of the cross dyke on the formation of inner bed topography was examined.
The results of the hydraulic experiments proved the formation of inner bed topography and sand bar when cross dykes spacing and cross dyke wing are properly considered. Based on these results, a river management planning was proposed.