文化大學機構典藏 CCUR:Item 987654321/20905
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/20905


    题名: Impact of flood damage on pollutant removal efficiencies of a subtropical urban constructed wetland
    作者: Ko, CH (Ko, Chun-Han)
    Chang, FC (Chang, Fang-Chih)
    Lee, TM (Lee, Tsai-Ming)
    Chen, PY (Chen, Pen-Yuan)
    Chen, HH (Chen, Hsin-Hsiung)
    Hsieh, HL (Hsieh, Hwey-Lien)
    Guan, CY (Guan, Chung-Yu)
    贡献者: 地學所
    关键词: Free water surface constructed wetland
    Pollutant removal efficiency
    Subtropical weather
    Typhoon
    日期: 2010-09
    上传时间: 2011-12-09 10:51:15 (UTC+8)
    摘要: Typhoons and hurricanes in subtropical/tropical regions can induce significant environmental changes (e.g., mass flooding and inundations). However, the damage to the pollutant removal efficiencies of constructed wetlands brought about by these natural disturbances has been neglected in major studies conducted in temperate climates. Therefore, this study compares the pollutant removal performance of a constructed wetland in the Danshui River Basin, before and after the system was inundated with flooding from Typhoon Krosa in 2007. The pollutant removal performance of the free water surface (FWS) constructed wetland was investigated monthly from September 2006 to April 2008. Results of the study demonstrated that this FWS wetland effectively removed 64.3% BOD, 98.9% NH(4)-N, and 39.5% Total-P before Typhoon Krosa. However, the extensive flooding caused by Typhoon Krosa swept over most of the aboveground plant community and deposited the sediment onto the bottom of each compartment. Subsequently, reduced pollutant removal efficiencies were observed. Only 37.7% BOD, 35.1% NH(4)-N, and 31.8% Total-P were removed after this event, although the flow regime was immediately restored. Comparing the water quality data for the FWS wetland before and after Typhoon Krosa revealed the immediate, quantitative damage to the pollutant removal performance caused by the typhoon's inundation. Consequently, a high-flow bypass and additional preventive measures would protect any constructed wetland in areas subject to typhoons. (c) 2010 Elsevier B.V. All rights reserved.
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