Abstract
To clear the agricultural non-point source effects on wetland water environment and the purification efficiency of wetland on non-point pollution. Use the fuzzy comprehensive evaluation method to analyze the water quality conditions of three different urban wetland of Harbin in north shore of Songhua river which affected by human Agriculture activities. Selected Wanbao wetland goose island and sun island water quality monitoring, monitoring time was in October 2004, May 2005, August 2005, and April 2008, a total of four times. The results shown that Wanbao wetland meets water quality planning V water, Goose Island and the sun island meets quality planning IV water. According to fuzzy coefficient can compare the three places wetland water pollution by heavy degree to light for Wanbao wetland > Sun island wetland > Goose island wetland. From upstream to downstream water purification by wetlands, water quality gradually improved.
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