RETENTION POND DESIGN TO REDUCE FLOOD LEVEL IN WAY BATU MERAH BASIN AMBON

• Main Author: Magdalena Simangunsong, Diana
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/67289
• Institution: Institut Teknologi Bandung

Ambon City is a city located in Maluku Province and is a central of government and a central of development. Way Batu Merah River which flows in the middle of Ambon City becomes one of the main reason of the flood disaster that happens every year and causes many harms in materil dan non-materil aspects. This research is meant to design the structure that can be contributed to reduce flood level in Way Batu Merah Basin. Structure that is designed include retention pond. Based on hydrological and hydraulics analysis with HECRAS 6.1, flood discharge for the 25 year return period is 139.73 m3/s. The capacity of the retention pond is 96.010 m3. The budget plan required for the construction of the pond is Rp.32.370.227.530,00. From the result, the solution that planned can reduce flood level up to 8% in Way Batu Merah Basin dan reduce flood hydrograph for the 25 year return period up to 11% and has delayed time for 8 minutes of flood coming to evacuate people.