Numerical Method Approach of Water Level Changes in Main Channel Jakabaring Sport City (JSC) Palembang, Indonesia

Abstract

This research was conducted to identify the main water level rise in the main channel Jakabaring Sport City (JSC) located at the Jakabaring watershed with a channel length of 600 m using the HEC-RAS ver.4.1.0 program with the initial conditions and boundary conditions as well as the planned discharge from the results of hydrological analysis.Palembang City has 108 tributaries. There are 4 major rivers that cross the city of Palembang, namely the Musi River, Komering river, Ogan river, and Keramasan river. Musi river is a largest river with an average width of 504 meters and a maximum width of 1,350 meters is located around Kemaro Island. So one of the channels that needs to be researched is the main channel of Jakabaring Sport City (JSC).The results showed that the pattern of water flow movement in the main channel of JSC, both in the return period (R₂, R₅, R₁₀, R₂₀ and R₅₀), overflow occurred at Sta. 0+000 (P₁₄) of 1.50 m. Overflow for Sta. 0+100 - Sta. 0+500 or the P₁₅-P₁₉ line ranges from 0.50 m to 1.00 m. While at Sta. 0+600 or P₂₀ either the return period R₂, R₅, R₁₀, R₂₀ and R₅₀ does not overflow.