Multi-Level Approach of the Ecotoxicological Impact of a Combined Sewer Overflow on a Peri-Urban Stream  

作　　者：Céline Becouze-Lareure Christine Bazin Philippe Namour Pascal Breil Yves Perrodin 

机构地区：[1]INSAVALOR, Division POLDEN, Villeurbanne, France [2]Irstea (Cemagref), Unité de Recherche Hydrologie Hydraulique, Lyon, France [3]Université de Lyon, ENTPE, CNRS, UMR 5023 Lehna, Vaulx-en-Velin, France [4]Université de Lyon, UCB Lyon 1, Institut des Sciences Analytiques, UMR 5280, Villeurbanne, France

出　　处：《Journal of Water Resource and Protection》2012年第11期984-992,共9页水资源与保护（英文）

摘　　要：In periurban zones, urban wet weather discharges have been recognized as the most significant vector of pollution in aquatic environments. The discharge of this water without treatment into the aquatic environment could present an ecotoxicological risk for biocenosis. The aim of the INVASION project is to assess the potential ecotoxicological impact of a combined sewer overflow (CSO) on a peri-urban stream. A comparative study between upstream and downstream areas of the CSO allowed observing significant effects of this overflow on the river. We studied three layers of stream: surface water, benthic layer and hyporheic layer. To characterize the potential ecotoxicological risk of water and sediments, we used a battery of 4 bioassays: Daphnia magna, Vibrio fischeri, Brachionus calyciflorus and Heterocypris incongruens. In parallel, we measured the physico-chemical parameters: ammonium (NH4+), chromium (Cr), copper (Cu) and lead (Pb). An ecological risk is greatest for the hyporheic zone in downstream river, particularly for the solid phase. These results corroborated with the physico-chemical data obtained.In periurban zones, urban wet weather discharges have been recognized as the most significant vector of pollution in aquatic environments. The discharge of this water without treatment into the aquatic environment could present an ecotoxicological risk for biocenosis. The aim of the INVASION project is to assess the potential ecotoxicological impact of a combined sewer overflow (CSO) on a peri-urban stream. A comparative study between upstream and downstream areas of the CSO allowed observing significant effects of this overflow on the river. We studied three layers of stream: surface water, benthic layer and hyporheic layer. To characterize the potential ecotoxicological risk of water and sediments, we used a battery of 4 bioassays: Daphnia magna, Vibrio fischeri, Brachionus calyciflorus and Heterocypris incongruens. In parallel, we measured the physico-chemical parameters: ammonium (NH4+), chromium (Cr), copper (Cu) and lead (Pb). An ecological risk is greatest for the hyporheic zone in downstream river, particularly for the solid phase. These results corroborated with the physico-chemical data obtained.

关 键 词：Combined SEWER OVERFLOW ECOTOXICITY Pollutants STORMWATER STREAM Urban Wet-Weather Flow 

分 类 号：R73[医药卫生—肿瘤]