Environmental impact of Hsuehshan Tunnel on water quality at Feitsui Reservoir and its tributaries
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Environmental impact of Hsuehshan Tunnel on water quality at Feitsui Reservoir and its tributaries Tai-Tien Wang
&
Fu-Shu Jeng & Tzu-Tung Lee
Received: 10 November 2019 / Accepted: 5 October 2020 # Springer Nature Switzerland AG 2020
Abstract To investigate the possible impact of the traffic flow of mountainous roads and the construction and operation of a long tunnel on the water quality of a reservoir, this study conducts statistical analysis on water quality, meteorological, and traffic data of the Feitsui Reservoir and its upstream tributaries over the last three decades. Results from statistical regression analysis indicate that in the upstream area where the traffic flow is low, water quality varies insignificantly with rainfall and traffic flow, providing as a background reference of natural environment. Water quality near a conventional highway on which many vehicles travel through the catchment area is significantly affected by both rainfall and traffic flow since the drainage system of a conventional highway sends its gathered water into adjacent rivers. Not only does traffic flow generate contaminants, but also the construction of the Hsuehshan Tunnel of the No. 5 Expressway, Taiwan, in the catchment area of the Feitsui Reservoir generates pollution. Drainage, silt settling and retarding basin, and (*) : F.
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