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Biomonitoring of the Derwent River at Derwent Bridge: 1995 - 2000


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Davies, PE ORCID: 0000-0003-2651-4061 and Cook, LSJ 2000 , Biomonitoring of the Derwent River at Derwent Bridge: 1995 - 2000.

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This report describes the cumulative results to April 2000 of the biological monitoring conducted in the Derwent River at Derwent Bridge prior to and following the commencement of discharge of the wastewater treatment plant (WWTP) constructed to treat waste waters from developments at Cynthia Bay at Lake St Clair. Monitoring of the biota of the ambient waters receiving discharge from the WWTP is required under the conditions of license to operate by the Department of Primary Industry Water and Environment (DPIWE). As part of those conditions, monitoring at two sites was required during a period prior to commencement of WWTP discharge (1995) and thereafter (1996, 1997, 1998, 2000). Sampling was conducted three times per year in 1995-1997 (once each in summer, autumn and winter), was decreased to twice a year in 1998 (once in autumn and winter). In 1998, the frequency of sampling was further decreased to once every second year, in autumn, with sampling conducted again in April 2000.
Pre-discharge biological monitoring commenced in early 1995. Commencement of WWTP discharge commenced in August 1996. There are therefore, three sampling events conducted prior to discharge. These
samples represent the ‘pre-discharge’ conditions, while all samples after late 1996 represent the ‘post-discharge’ conditions.

Item Type: Report (Project Report)
Authors/Creators:Davies, PE and Cook, LSJ
Publisher: Freshwater Systems and DPIWE Hobart
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