Environmental biology

Pollutant loads of surface runo inWuhan City Zoo, an urban tourist area


ZHAO Jian-wei , SHAN Bao-qing , YIN Cheng-qing

DOI:

Received March 31, 2006,Revised June 05, 2006, Accepted , Available online

Volume 19,2007,Pages 464-468

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The pollutant loads of surface runo in an urban tourist area have been investigated for two years in the Wuhan City Zoo, China. Eight sampling sites, including two woodlands, three animal yards, two roofs and one road, were selected for sampling and study. The results indicate that pollutants ranked in a predictable order of decreasing load (e.g. animal yard>roof>woodland>road), with animal yards acting as the key pollution source in the zoo. Pollutants were transported mainly by particulate form in runo . Particulate nitrogen and particulate phosphorous accounted on average for 61%, 78% of total pollutant, respectively, over 13 monitored rainfall events. These results indicate the treatment practices should be implemented to improve particulate nutrient removal. Analysis of the M(V) curve indicate that no first flush e ect existed in the surface runo from pervious areas (e.g. woodland, animal ground yard), whereas a first flush e ect was evident in runo from impervious surfaces (e.g. animal cement yard, roof, road).

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