Analysis of water quality and mosquito larval breeding at the tail water wetland of the Shanghai East Water Purification Plant

doi:10.3969/j.issn.1000-5641.2018.06.015

Abstract

Abstract: In this study, a constructed wetland for advanced treatment of tail water at the Shanghai East Water Purification Plant was taken as an example to explore the relationship between environmental factors, such as water quality and mosquito (Culex pipiens pallens) larval breeding. The comprehensive pollution index (P Value) method and organic pollution index (A Value) method were used to evaluate the water quality of wetland from May to November of 2017. The breeding status of mosquito larvae at 14 sample points in the wetland were monitored by the standard dipping method during this period. The subsequent analysis showed that:① The water quality of the wetland was better than Class V of the environmental quality standard for surface water; ② The larval density was higher in water whose P Value was equal to or greater than 143.1 per spoon; ③ The larval density was high between May and August and declined with the decrease of temperature; ④ The larval density was significantly lower in areas where the water surface could be exposed to direct sunlight (p<0.05); and ⑤ The larval density was small when the concentration of Chlorophyll a was high, and excessive duckweed coverage can inhibit mosquito breeding.

Key words: constructed wetland, water quality, mosquito larval breeding

CLC Number:

X835

LU Xin-yu, XIAO Bing, HUANG Min-sheng, HE Yan, LI Xin-ran, YIN Chao, LENG Pei-en. Analysis of water quality and mosquito larval breeding at the tail water wetland of the Shanghai East Water Purification Plant[J]. Journal of East China Normal University(Natural Sc, 2018, 2018(6): 122-130.

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