DESIGN OF PROTECTION BUILDING IN THE SANGGAR RIVER’S BRIDGE, KABUPATEN NABIRE, PAPUA

• Main Author: Rasyid, Ilmiadin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43140
• Institution: Institut Teknologi Bandung

The river is one of the natural resources to be utilized for human life, including the supply of irrigation water, raw water, industry, transportation and others. The river can cause problems if the water surface erodes the base of the bridge, the flow regime affects the damage around the river environment. This study aims to create a bridge protection infrastructure on the Wanggar River. In this study the authors used a 100 year return period flood discharge of 2169 m3 / s from the Log Pearson III distribution, then the results of the flood discharge were modeled with HEC RAS 5.0.5 and scour. The results of HEC RAS 5.0.5 modeling and manual calculations show that local scours, contractions and general scours occur. Therefore, three protective buildings were chosen that could be constructed, namely riprap, bronjong and toskane. The three buildings are then reviewed with Multi Criteria Analysis which is the best. The Multi Criteria Analysis results obtained that the first best alternative is Gabion, the second best alternative is Toskane then riprap.