Urban pollutant removal by a constructed riparian wetland before typhoon damage and after reconstruction |
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| Authors: | Chihhao Fan Fang-Chih Chang Chun-Han Ko Yiong-Shing Sheu Chia-Ji Teng Tzi-Chin Chang |
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| Affiliation: | 1. Department of Safety, Health and Environmental Engineering, Mingchi University of Technology, Taipei County 24301, Taiwan;2. The Instrument Center, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan;3. School of Forest and Resources Conservation, National Taiwan University, Taipei 10617, Taiwan;4. Department of Water Quality Protection, Environmental Protection Administration, Executive Yuan, Taipei 10042, Taiwan;5. Environmental Protection Bureau, Taipei County Government, Taipei 22001, Taiwan;6. Environmental Protection Administration, Taipei 10042, Taiwan;1. Cambridge Centre for Climate Change Mitigation Research, Department of Land Economy, University of Cambridge, 19 Silver Street, Cambridge CB3 9EP, United Kingdom;2. Graduate Institute of Environmental Engineering, National Taiwan University, Taiwan, ROC;1. State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun 130117, China;2. School of Geographic Science, Northeast Normal University, Changchun 130024, China;3. School of Environment, Northeast Normal University, Changchun 130117, China;4. Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, USA;1. Department of Occupational Safety and Health, 157 Industry & Technology Center, Murray State University, Murray, KY 42071, United States;2. Department of Industrial & Systems Engineering, 3301 Shelby Center, Auburn University, AL 36849, United States;1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. College of Environmental Science and Engineering, Key Laboratory of Water and Sediment Sciences (Ministry of Education), Peking University, Beijing, 100871, China |
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| Abstract: | Flood damage as a result of an extreme weather event is always a potential threat to constructed riparian wetlands in subtropical regions, and such damage can significantly impair the pollutant-removing performance of these wetlands The present study compares the pollutant-removal performance of the Hsin-Hai Bridge constructed wetland in the Tan-shui River basin of metropolitan Taipei in September 2000 (before the system was inundated by flood as a result of Typhoon Aere’) and in mid-October 2004 (after reconstruction of the wetland). The study analyses biochemical oxygen demand (BOD), ammonia nitrogen (NH4-N), and total phosphorus (TP) of influents and effluents in each of several compartments and for the system as a whole before the typhoon and after reconstruction. The study finds that performance with respect to BOD and NH4-N was marginally reduced (with no statistical significance) after reconstruction, but that performance with respect to TP was markedly improved (with statistical significance) after reconstruction. The study provides possible explanations for these findings and concludes that wetlands can be successfully reconstructed after extreme flood damage. |
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