STUDY OF FLOOD DISPOSAL BASED ON STEADY FLOW ANALYSIS WITH HECRAS ON CAMPUS I OF LAMBUNG MANGKURAT UNIVERSITY, BANJARMASIN

Abstract

The city of Banjarmasin, especially northern Banjarmasin, which is a lowland located at an average altitude of 0.16 m below sea level, so that when the sea water is high, it flows into residential areas to the ULM Campus I area. In this study, the flood discharge method used is the Rational method with a return period of 2, 5, 10, 25, 50 and 100 years. After the flood discharge was found, the analysis of the longitudinal and transverse sections of the Prince river was then modeled using Steady Flow Analysis on HECRAS according to the return period of the rain. Simulation results using Steady Flow Analysis on HECRAS which are close to the design flood discharge are station 12 with discharge times of 2, 5,10, 25, 50 and 100 years respectively, namely 41.18 m³/s, 55.33 m³/s , 64.47 m³/s, 74.74 m³/s, 83.92 m³/s, 92.33 m³/s, so that the design flood discharge can be used for further calculations and used as a reference in the construction of hydraulic buildings.

Keywords: Flood Discharge, Cross Section Analysis, Steady Flow Analysis.