Analisis Tinggi Muka Air Kanal Bandara Kota Tarakan Akibat Pengaruh Pasang Surut Menggunakan HEC-RAS 6.0

Abstract

Abstract Floods caused by high tides or tidal floods are one of the disasters that often occur in coastal areas that inundate the mainland areas in coastal areas that have lower elevations than the high tide sea level. The occurrence of tidal floods has entered residential areas at several locations in Tarakan, including around the Tarakan City airport canal. Based on field observations, there are residential areas on the left side of the Tarakan City airport canal, so the inundation disturbs the activities of the residents. Based on this problem, this study aims to determine the water level in the section of the Tarakan City airport canal due to tidal floods and floods with a 5-year and 10-year return period. The method used to analyze the water level of the Tarakan City airport canal is by using the HEC-RAS software. Based on the analysis results of the water level using HEC-RAS, the water level in the Tarakan City airport canal section due to a 5-year and 10-year flood that occurs simultaneously with the highest tide (HHWL) was obtained the water level at the sta 0+100 - 1+000 section is 3,8 m and the section of 1+100 - 1+500 is 3,81 m. From the results of this study, it is recommended that the government build flood control by constructing embankments with an elevation of +4,5 m from the lowest water level datum (LLWL). Keywords: Flood design, HEC-RAS, tides, water level

Keywords

• flood design
• hec-ras
• tides
• water level