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BEHAVIOR OF THE BENTHIC FAUNA IN THE RIVER RECEIVING AN EFFLUENT FROM A SEWAGE TREATMENT PLANT
Omura, Tatsuo,Umita, Teruyuki,Fukushi, Kensuke 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.16 No.1
ABSTRACT The investigation of benthic fauna in the river receiving the effluent of sewage treatment plant was conducted in order to evaluate the impact of the effluent against the river ecosystem. The benthic fauna was significantly influenced by the effluent of sewage treatment plant. The effluent of sewage treatment plant brought the decrease in species of benthic animals so that the diversity of benthic fauna in the natural river. On the other hand, the biomass of benthic animals increased near the outfall of sewage effluent, and chironomidae (R-type) was predominant. The result obtained from investigation showed that the benthic fauna could be used as an effective index in evaluating the impact of sewage effluent from the ecological viewpoint. The investigation of benthic fauna in the river receiving the effluent of sewage treatment plant was conducted in order to evaluate the impact of the effluent against the river ecosystem. The benthic fauna was significantly influenced by the effluent of sewage treatment plant. The effluent of sewage treatment plant brought the decrease in species of benthic animals so that the diversity of benthic fauna in the receiving river would remarkably drop in comparison with that of the natural river. On the other hand, the biomass of benthic animals increased near the outfall of sewage effluent, and chironomidae (R-type) was predominant. The result obtained from investigation showed that the benthic fauna could be used as an effective index in evaluating the impact of sewage effluent from the ecological viewpoint.