Abstract

This study primarily investigates the current pattern distribution characteristics near Port of Keelung. MIKE-21 HD model calculations data and actual measurement data were compared, and a reasonable comparison result was obtained from the simulation results and measurement data. The range of influence after the extension of the eastern breakwater fell approximately around the sheltered areas of the two sides of the breakwater and around the breakwater head. The current velocity was generally reduced around the breakwater entrance. In addition, the current direction changes were evident, and current circulation occurred between the eastern and western breakwaters. The research results can be provided as a reference for subsequent safety assessment calculations regarding large ships entering Port of Keelung and associated engineering constructions.

Introduction

Port engineering constructions mainly service ships, and the engineering planning and design of the breakwaters, which constitute the outlying water areas of the port, principally serve to block incident waves from the open sea from influencing the calmness of the port's water area and to provide a shielding function so that ships can operate into the port safely. Port of Keelung is surrounded on three sides by hills that offer favorable shelter, and is a crucial port in Northern Taiwan. During the era of Taiwan's economic boom in the 1960s, Port of Keelung played the role of a transportation artery in the freight transport of Taiwan's foreign trade, with main import and export routes going to nearby regions, including Northeast Asia, Hong Kong, and Southeast Asia (Harbor and Marine Technology Center [IHMT], Institute of Transportation, Ministry of Transportation and Communications R.O.C.). However, because the transportation channel between Port of Keelung and the hinterlands is extremely congested and the railroad transportation system is mainly used by commuters, no additional space is available for cargo transport. Consequently, the scale of the harbor basin cannot be expanded and no space exists for building a new dock; therefore, the growth rate of cargo handling volume at Port of Keelung has slowed down over the years since 1988.

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