| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 94 === In Taiwan, the policy to prevent water pollution is adopting “administrational control” and “effluent charge”. The effluent charge is an economic incentive policy for achieving the required stream water quality goals under the minimum total social cost. This study analyzed the water pollution prevention cost of undertaking in the Nan-Kan River basin. By using the QUAL2K stream water quality model to simulate well mixed water quality on steady state, we can evaluate the improvement of stream water quality and effects of effluent charge levying under different effluent charge.
The result shows the pollution-reduction increases and stream water quality improves when the effluent charge is going up. As the effluent charge is 70 NT/Kg-COD, the BOD can reduce to 4.00 mg/L and conform to the stream water quality of Nan-Kan River basin, under the designed stream flow is Q75. Under Q90, as the effluent charge is 40 NT/Kg-COD, the BOD can reduce to 3.99 mg/L and conform to the stream water quality of Nan-Kan River basin.
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