Abstract:
This paper presents the analysis of riverbank protection consisting of 3 methods (i.e., gabion filled with small-sized stone, mortar riprap and gabion filled with recycled materials). It is found that all three methods are suitable for riverbank protection at the studied site. The engineering economic analysis for these 3 methods reveals that the method of which the gabions are filled with recycled materials is the most suitable method. Its annual investment cost (for 80 meters long) is 78,249 bath, the benefit cost ratio is 1.64. The rock gabion and mortar riprap methods provide the annual investment cost of 122,819 bath and 99,913 bath, respectively. The benefit cost ratios are 1.04 and 1.28, respectively. It can be concluded that the gabion filled with recycled materials is an appropriate solution when considering the reduction of resource consumption.