EVALUATION ON MERAUKE DRAINAGE SYSTEM IN OVERCOMING FLOOD PRONE AREAS

Abstract

Merauke city suffers flooding almost every rainy season, which could endanger the environment and disturb people's activities. One of the worst floods happened in 2019, where flooding damaged vegetables and other crops, impacted the city's economy, and later caused inflation. Therefore, a study on evaluating the drainage system in Merauke city is needed to overcome this issue in the future. This study was conducted through a field survey and literature study with data that varies from hydrological data, elevation data, and hydraulics data. Hydrological data includes rainfall data per year, and hydraulics data consists of the drainage network and designs. The analysis of this data will then carry out, resulting in the normalization of a drainage system. The result of this study found that the capacity of the current drainage system is 10.815 m3/s, where this amount of flood discharge cannot accommodate the amount of rainfall. Also, the existing drainage system is missing a component that had not been built in the first place, which affects the drainage's capacity. Therefore, a normalization of the drainage system is needed to avoid flooding.