Flow Analysis for Navigation Safety by Using iRIC Model Nays2DH

Abstract

AbstractFor safer navigation, it is important to reduce the shallow water effects and reduce the possibility of sedimentation. The shallow water effect is a vital factor in confluence areas where the depth of the navigation routes is subject to frequent changes during high flow and low flow times. This study summarizes the flow analysis during the process of improving the navigation channel around a confluence area by excavating shallow areas up to two possible bed elevation levels (3.3 OPm and 2.8 OPm). The analysis results, demonstrated that the depth has increased and the velocity has decreased in the excavated areas showing an improvement. Velocity has reduced from 1.1 m/s in the existing condition to 1.0 m/s for 3.3 OPm at excavation level and 0.8 m/s for 2.8 OPm at excavation level. Water depth is improved for 2.8 OPm at excavation level more than 3.3 OPm level. However, for both excavation levels water depth has been improved than the existing condition. Overall, the shallow water effect would be lessened after at least some of the proposed excavation plans.