Centre for Water Resources Research, University College Dublin, Newstead Building, Belfield, Dublin 4, Ireland.
Mar Pollut Bull. 2013 Jun 15;71(1-2):117-28. doi: 10.1016/j.marpolbul.2013.03.025. Epub 2013 Apr 23.
A hydro-environmental model is used to investigate the effect of cessation of thermal discharges from a power plant on the bathing water quality of Dublin Bay. Before closing down, cooling water from the plant was mixed with sewage effluent prior to its discharge, creating a warmer, less-saline buoyant pollutant plume that adversely affects the water quality of Dublin Bay. The model, calibrated to data from the period prior to the power-plant shut-down (Scenario1), assessed the water quality following its shut-down under two scenarios; (i) Scenario2: continued abstraction of water to dilute sewage effluents before discharge, and (ii) Scnenario3: sewage effluents are discharged directly into the Estuary. Comparison between scenarios was based on distribution of Escherichia coli (E. coli), a main bathing quality indicator. Scenarios1 and 2, showed almost similar E. coli distribution patterns while Scenario3 displayed significantly higher E. coli concentrations due to the increased stratification caused by the lack of prior dilution.
采用水-环境模型研究了发电厂停止热排放对都柏林湾浴场水质的影响。在关闭之前，电厂的冷却水与污水混合排放，形成了一个更温暖、盐度更低的浮力污染物羽流，这对都柏林湾的水质产生了不利影响。该模型根据电厂关闭前的数据进行了校准（情景 1），评估了关闭后的两种情景下的水质：（i）情景 2：继续抽取水来稀释污水排放物，然后再排放；（ii）情景 3：污水直接排入河口。情景之间的比较是基于大肠杆菌（E. coli）的分布，大肠杆菌是主要的浴场水质指标之一。情景 1 和 2 显示出几乎相似的大肠杆菌分布模式，而情景 3 由于缺乏预先稀释导致的分层加剧，显示出明显更高的大肠杆菌浓度。
