Analysis of two-way navigation mode in one-way inland waterway

Abstract

To analyze the feasibility and rationality of two-way navigation mode in one-way waterway, the key parameters and ship delay of two-way tidal or continuous navigation mode were studied. According to the principle of tidal navigation, the tidal cycle, the required minimum capacity of berthing area, and average delay of two-way tidal navigation mode were calculated. Using the simulation of inland vessel traffic, the conditions required for two-way continuous navigation in one-way waterway were analyzed, and the formulae for the delay and space between adjacent meeting areas were obtained. Finally, based on the delay, the criteria for the selection of the two navigation modes were proposed. The results show that the required minimum capacity and average ship delay of two-way tidal navigation mode are positively correlated with the waterway length and ship arrival rate, while negatively correlated with ship speed. The two-way continuous navigation mode can only be realized if the meeting areas are set reasonably when the ships arrive uniformly and the arrival rate is less than 4 ship/h. The space between adjacent meeting areas is directly proportional to the ship speed and inversely proportional to the arrival rate. The average ship delay of two-way continuous navigation mode is equal to the inverse of the arrival rate. The longer the one-way waterway, the greater the arrival rate, and the better two-way continuous navigation mode. When the ship speed is 8 km/h and the one-way waterway length is 5, 10, 20 km, respectively, the minimum ship arrival rate suitable for two-way continuous navigation is 1.71, 0.87, 0.44 ship/h, respectively. Otherwise, two-way tidal navigation should be adopted.