|Title:||Analysis of trends in water quality: Constructed wetlands in metropolitan Taipei||Authors:||Cheng, B.-Y.
|Keywords:||Danshui River; Mann-Kendall test; Riparian wetland; Taiwan||Issue Date:||2011||Journal Volume:||64||Journal Issue:||11||Start page/Pages:||2143-2150||Source:||Water Science and Technology||Abstract:||
Meandering through the most densely populated metropolitan areas of Taipei, Taiwan, the Danshui River and its tributaries have undergone the construction of 14 wetlands since 2004, as a means to improve water quality. This study was conducted to examine the functional capabilities associated with treating non-point source pollution through these riparian wetlands. Trend analysis was used to differentiate dissolved oxygen, biochemical oxygen demand, suspended solids, ammonia, and Escherichia coli, among 13 sampling sites using both functions of a Mann-Kendall test and a seasonal Mann-Kendall test. The results show that water quality in Taipei metropolitan rivers has been improving since increasing the number of constructed wetlands and connecting households to the public sewage system. The concentration of pollutants such as those influencing biochemical oxygen demand have gradually declined in drought seasons because riparian wetlands contribute a base flow to dilute riverine pollutants. This paper indicates that the creation of treatment systems influences dissolved oxygen conditions at the municipal scale, suggesting that constructed wetlands could stabilize water quality during extreme hydrological events and improve water quality particularly in times of drought. © IWA Publishing 2011.
|DOI:||10.2166/wst.2011.785||SDG/Keyword:||Baseflows; Constructed wetlands; Functional capabilities; Hydrological events; Mann-Kendall test; Metropolitan area; Non-point source pollution; Riparian wetland; Sampling site; Sewage system; Suspended solids; Taiwan; Treatment systems; Trend analysis; Biochemical oxygen demand; Dissolved oxygen; Drought; Escherichia coli; Pollution; Quality control; Rivers; Sewage; Stream flow; Water quality; Wetlands; River pollution; ammonia; baseflow; biochemical oxygen demand; coliform bacterium; constructed wetland; dissolved oxygen; drought stress; metropolitan area; nonpoint source pollution; riparian zone; river pollution; sewage; water quality; article; Escherichia coli; suspended particulate matter; Taiwan; water pollution; water quality; wetland; Cities; Rivers; Taiwan; Time Factors; Waste Disposal, Fluid; Water Pollutants; Water Purification; Water Supply; Wetlands; Danshuei River; Taipei; Taiwan
|Appears in Collections:||生物環境系統工程學系|
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