Modelling effects of realignment of Keelung River, Taiwan

doi:10.1680/maen.2008.161.2.73

Modelling effects of realignment of Keelung River, Taiwan

Authors: W.-C. Liu ¹ ; W.-B. Chen ² ; C. H. Wu ³
Source: Proceedings of the ICE - Maritime Engineering, Volume 161, Issue 2, pages 73 –87 , ISSN: 1741-7597, E-ISSN: 1751-7737

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Maritime Engineering publishes high-quality technical papers relevant to maritime civil engineering activities in estuaries, along coastlines and at offshore locations.

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The journal focuses on the salt-water environment in the context of safe and sustainable engineering; it aims to publish papers relevant to consulting, client and contracting engineers, and those engaged in management, planning and applied research.

Topics include social and economic aspects relating to fixed and moving port and harbour developments, estuarine and coastal protection, habitat creation and maintenance, seabed pipelines and tunnels, oil, gas and mineral extraction facilities, and alternative energy production systems.
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In this subject: Water and Wastewater, Maritime, Sitework
By this author: W.-C. Liu , W.-B. Chen , C. H. Wu

A three-dimensional hydrodynamic model was implemented and applied to the Danshuei River estuarine system and its adjacent coastal sea in northern Taiwan. The model was calibrated and verified with the available hydrological data measured in 2000. A detailed model calibration and verification was performed using field data which consisted of the measured amplitudes and phases of five tidal constituents, water surface elevations, tidal current and salinity distributions. The overall performance of the model was in qualitative agreement with the field data. The validated model was then used to investigate the changes in salt water intrusion and residual circulation as a result of channel regulation in the Keelung River. The residual circulations before channel regulation differed slightly from those after channel regulation and the result for the limits of salt intrusion before channel regulation were only slightly different from those after channel regulation. At the Kuan-Du wetland, the saline difference was only 0·3 parts per thousand. These results suggest that the channel regulations for flood control in the Keelung River made no substantial contribution to the expansion of the mangrove areas and disappearance of freshwater marshes in the the Kuan-Du wetlands.

Keywords: models (physical); mathematical models; maritime engineering
Document Type: Research Article
DOI: 10.1680/maen.2008.161.2.73
Affiliations: 1: Department of Civil and Disaster Prevention Engineering, National United University Miao-Li, Taiwan; 2: Taiwan Ocean Research Institute, National Applied Research Laboratories Taipei, Taiwan; 3: Department of Civil and Environmental Engineering, University of Wisconsin Madison, USA

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Modelling effects of realignment of Keelung River, Taiwan