珠江八大入海口门可溶态铜的时空变化及其影响因素

Spatio-temporal Variability and the Influencing Factors of Dissolved Copperin Riverine Runoff at Eight Outlets in the Pearl River Estuary

以1987年至2011年的月测数据为基础,分析了珠江八大人海口可溶态铜的时空变化,并探讨了工业发展、铜矿厂分布、水产养殖及铜消费量等因素对它们的影响。研究结果表明:与国内外其它人海口相比,珠江口可溶态铜的含量处于较高水平,其中,虎门水道(A1)可溶态铜的含量显著高于除鸡啼门水道(A6)外的其它人海口(p<0.1),可能是受工业废水排放及铜矿厂分布的影响。在时间变化趋势上,8个采样点之间,除了A1与A4外,其它采样点间均呈显著的正相关性(p<0.1),其中A5和A6的变化趋势还与我国的铜消费量具有显著相关性(p<0.1),表明人海口之间铜污染可能具有相似的影响因素,且工业生产活动对水体铜污染的波动具有一定的影响。

On the basis of monthly measurement data from 1987 to 2011, the spatio-temporal variability of dissolved copper in riverine runoff at the eight outlets of the Pearl River Estuary were examined and associated influencing factors, such as industrial effluents, distribution of copper factories and aquaculture, were discussed. The results indicated that the dissolved copper in this study showed high levels compared to those in other estuaries in the world. The levels of the dissolved copper in Humen outlet （A1） were significantly higher than others except for Jitimen outlet （A6） （p 〈 0.1）, which may be affected by the industrial discharges and copper mining factories. The temporal tends of copper concentration shad significant correlations among the eight sampling points, except for A1 and A4. In addition, the temporal tends at A5 and A6 significantly corre- lated with the copper consumptionrates in China （p 〈0.1）. This finding suggested that the copper pollution at-he eight riverine runoff outlets may be influenced by similar factors, and that the industrial activities may be an important factor in influencing the temporal tends of copper pollution in the Pearl River Delta.