Stable cross-sectional dimensions for navigation channel in the estuary of Sangatta River, Indonesia

The objectives of this study are: 1) to capture the existing condition river channel in Sangatta River estuary, including bathymetry bed, and cross-sectional dimensions river, 2) design a stable navigation estuary that allows less maintenance dredging improves navigability during critical when water level is at lowest, 3) test effectiveness cross section term availability navigable depth. This research divided into five stages, namely: preparatory stage preliminary survey, main surveys, hydrological hydraulic analysis, 4) waterway design, 5) plan. analysis also includes determining depth profiles before after dredging. HEC-RAS software used simulate, for each month, sea low spring (LWS) coincides with flow 50% probability occurrence, Q50. A characterized bed slope, S = 0.00015, depth, D 3.6 m, width, b 76.3 m sidewall 1.5. simulation results show sections provide sufficient navigation, even condition.