Analisa Tinggi Muka Air Banjir Terhadap Elevasi Jalan Desa Kelebuk

Kelebuk Village Road, located in Bengkalis District, Bengkalis Regency, is a primary route that frequently experiences flooding due to high rainfall and tidal events. This study aims to analyze the maximum floodwater level and compare it with the existing road elevation, as well as to provide technical recommendations for flood mitigation in the area. The methods used include hydrological analysis to determine design rainfall using the Log Pearson Type III distribution, runoff discharge calculation using the Rational Method (Q = C × I × A), and road elevation measurement using a leveling instrument (waterpass). Rainfall data were obtained from the BMKG station over the past five years. The results of the study show that the maximum floodwater level in the study area reaches 1.456 meters, while the average road elevation is only 1.32 meters. The difference of 0.14 meters (14 cm) causes parts of the road to become inundated during flooding. Moreover, the capacity of the existing drainage channels is insufficient to accommodate the design runoff for a 5-year return period, increasing the risk of road damage and disrupting community mobility. Based on these findings, it is recommended to raise the road elevation by at least 0.30 meters at critical points and to redesign the drainage system to handle the design discharge properly. This research is expected to serve as a reference for infrastructure planning and flood control strategies in flood-prone areas like Kelebuk Village.