唐山市南湖中央生态公园水质质量监测、风险源预警及识别

目的 通过对唐山市南湖中央生态公园湖水水质进行监测和评价,了解南湖水质当前的富营养化和重金属污染状况.方法 选择8个采样点,分别测定温度、pH值、浊度、溶解氧(DO)、化学耗氧量(COD)、五日生化需氧量(BOD530)、总磷(TP)、氨氮、硝酸盐氮、亚硝酸盐氮、汞、砷、铜、锌、镍、铅、镉等指标.结果 各采样点的感官性状均不符合标准,洗星池、养龙水西、养龙水北和青天镜的4个采样点的BOD530均超出国家标准,青天镜的4个采样点的总磷、氨氮、硝酸盐氮均超过国家标准.各采样点其余指标均符合国家标准.单因子污染指数和综合污染指数表明,洗星池的水质最好,综合污染指数为0.27,养龙水的水质仅次于洗星池,综合污染指数的平均值为0.22,这两处均属水质合格的水域.青天镜水质最差,综合污染指数的平均值为1.99,属污染水域.结论 南湖水域的洗星池及养龙水的水质属于水质合格水域,青天镜水质较差,属于污染水域.污染的严重程度为:青天镜＞养龙水＞洗星池.

Monitoring and evaluation on water quality of South Lake central ecological park in Tangshan

OBJECTIVE To assessment the current eutrophication and heavy metal pollution condition of South Lake by monitoring the water quality of Tangshan south lake central ecological park.METHODS The shallow water of 8 sample points were collected to determine temperature,pH,turbidity,dissolved oxygen(DO),biochemical oxygen demand(COD),biological oxygen demand(BOD 5 20),total phosphorus(TP),ammonia nitrogen,nitrite nitrogen,nitrate nitrogen,Hg As,Cr,Cu,Zn,Ni,Pb,Cd and so on.RESULTS The sense character of all sample points was not according with national standards.The BOD 5 20 contents of Xixingchi,West Yanglongshui,North Yanglongshui and the four sampling points of Qingtianjing were more than the national standards.The TP,Ammonia nitrogen and Nitrate nitrogen of Qingtianjing’s sample points exceeded national standards.Indexes of other sample were according to national standards.The comprehensive pollution index of Xixingchi was 0.27,which belongs to clean water.Yanglongshui,where comprehensive pollution index is 0.22,belongs to clean water.Qingtianjing,where comprehensive pollution index is 1.99,belongs to polluted waters.CONCLUSION Xixingchi and Yanglongshui belongs to clean water.Qingtianjing belongs polluted water.The TP,Ammonia nitrogen and Nitrate nitrogen of Qingtianjing’s four sample points exceeded national standards.The severity of the pollution is Qingtianjing ﹥ Yanglongshui ﹥ Xixingchi.