福州市仓山区内河主要水质指标的特征研究

Characteristics of the main water quality indexes of inland rivers in Cangshan district,Fuzhou City

以福州市仓山区6条城市内河为研究对象,分别于雨、晴两种天气下采集水样,比较了内河水体中总氮、总磷、铵态氮、化学需氧量和悬浮固体几项主要水质指标的差异.结果表明:雨天时,浦上河水体的主要污染物为总氮和化学需氧量,红旗浦水体的主要污染物为总磷和铵态氮,洪阵河的悬浮固体浓度最高,且与其他河流差异显著(P<0.05).晴天时,洋洽河水体的总氮、总磷、铵态氮和悬浮固体均显著高于其他河流,浦上河的化学需氧量浓度最高;相关性分析表明,几种水质指标之间多呈现出极显著相关性.两次采样,6条城市内河的水体总氮、总磷、铵态氮和化学需氧量浓度多数高于地表水环境质量标准(GB 3838—2002)Ⅴ类标准.

Six inland rivers in Cangshan district, Fuzhou city were sampled in rainy and sunny days, respectively. Five water qualityindexes （total nitrogen, total phosphorus, ammonium nitrogen, chemical oxygen demand, and suspended solids） were detected. Theresults showed that the dominant pollutants in Pushang River were total nitrogen and chemical oxygen demand in the rainy day but inHongqipu River they were total phosphorus and ammonium nitrogen. The concentration of suspended solids in Hongzhen River wassignificantly higher than the others （P〈 0. 05）. In sunny day, the concentrations of total nitrogen, total phosphorus, ammoniumnitrogen and chemical oxygen demand in Yangqia River were significantly higher than those of the others, and chemical oxygendemand concentration in Pushang River was the highest. The correlation analysis showed that there were significant correlationsamong 5 water quality indexes. For 2 samplings, concentrations of total nitrogen, total phosphorus, ammonium nitrogen and chemicaloxygen demand in water bodies of 6 inland rivers were mostly higher than V grade of surface water environmental quality standard（GB3838-2002）.