关键词: 水路运输, 通过能力, 船舶交通流, 内河交通, 长江中下游, 数据拟合

Abstract:

In order to calculate waterway traffic capacity accurately and conveniently, the traffic capacity model is built based on the tested data of traffic flow. The traffic flow data including vessel speed, arrival time, vessel length, vessel clearance are collected in Wuhan, the midstream of Yangtze River, and Wuhu, the downstream of Yangtze River, using manual continuous acquisition method. Analysis of vessel speed, vessel clearance and vessel length distribution rule shows that vessel speed in Wuhu and Wuhan, vessel clearance in Wuhan obey the normal distribution, while vessel clearance in Wuhu obeys lognormal distribution. Combining with the existing information and fitting of the relationship between the tonnage and length, the results show that the vessel length is proportional to the quadratic of tonnage. Introduction of design-hour traffic volume and navigation days, the midstream-downstream of Yangtze River traffic capacity model is established and calculated. The results of simulation show that the newly calculated traffic capacity is smaller than the tradition one with an acceptable error. So the new formula can be used to calculate traffic capacity.

Key words: waterway transportation, traffic capacity, vessel traffic flow, inland waterway transportation, the midstream-downstream of Yangtze River, data fitting