Philip Chown BP oil
Estimating Spatial Patterns of Effluent Exposure Concentrations in Direct Toxicity Assessment Studies
Hydrodynamic models of differing scale and complexity were used to estimate spatial patterns of effluent concentration in discharge plumes in the River Esk and the Lower Tees Estuary. The output from the Tees model was used, in conjunction with measurements of toxicity determined in short-term oyster embryo tests, to predict contours / zones of toxicity in the estuary associated with effluent discharges from four chemical processing sites. One of the discharges also combined the input from a municipal sewage treatment works. The models appeared to be effective in predicting patterns of dilution and dispersion of the effluent discharges in the respective receiving environments. Confirmation of the predictive capabilities of the Tees model was achieved by comparing predicted and measured toxicity in different regions of the plumes associated with the four discharges. Differences between predicted and measured toxicity for two of the four discharges were explicable in terms of failure to take account of the effects of real-time wind conditions when test samples were collected or overlap of adjacent discharge plumes. Suggested refinements to the models and measurement of effluent toxicity would further enhance the utility of this approach for determining the extent and significance of the effects of effluent discharges in receiving environments.
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The Barn and Oast, North Lane, South Street, Boughton-under-Blean, Faversham, Kent, ME13 9NN, UK
Andrew E. Girling
AstraZeneca UK Ltd., Brixham Environmental Laboratory, Freshwater Quarry, Brixham, TQ5 8BA, UK
Andrew M. Riddle
WS Atkins Consultants Limited, Wooldcote Grove, Ashley Road, Epsom Surrey, KT18 5BW, UK
George M. Mitchell
BP International Limited, Research and Engineering Center, Chertsey Road, Sunbury-on-Thames, Middlesex, TW16 7LN, UK
Philip K. Chown
Environment Agency, Evenlode House, Howbery Park, Wallingford, Oxfordshire, OX10 8BD, UK
Environment Agency, Dales Area, Swan House, Thornaby, Stockton on Tees, TS17 6BP, UK
WRc-NSF Limited, Henley Road, Medmenham, Marlow, Buckinghamshire, SL7 2HD, UK
National Center for Ecotoxicology and Hazardous Substances, Environment Agency, 4, The Meadows, Waterberry Drive, Waterlooville, Hampshire, PO7 7XX, UK
Correspondence to Andrew E. Girling.
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Girling, A.E., Riddle, A.M., Mitchell, G.M. et al. Estimating Spatial Patterns of Effluent Exposure Concentrations in Direct Toxicity Assessment Studies. Ecotoxicology13, 449-461 (2004). https://doi.org/10.1023/B:ECTX.0000035295.97557.6b
- effluent exposure
- hydrodynamic model
- River Esk
- lower tees estuary
- oyster embryo larval test
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