The spatio-temporal of water environmental status in Dianchi lake
The spatio-temporal of water environmental status in Dianchi lake
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DOI：
10.3724/issn1000-3207-2004-2-124-m
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发表时间：
2004-03
期刊：
影响因子：
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通讯作者：
F. Tao;Ao Hong-yi;Liu Jiantong;Cai Qing-hua;Liu Yongding
中科院分区：
文献类型：
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作者：
F. Tao;Ao Hong-yi;Liu Jiantong;Cai Qing-hua;Liu Yongding
经过几十年的经济改革和工业的蓬勃发展，大量污染物排入滇池，滇池水体富营养化严重。为了调查滇池污染状况，2001年9月至2002年8月，在滇池外海设置了40个采样点，每月对pH、DO、透明度、总磷、溶解性总磷、溶解性磷、总氮、氨氮和叶绿素进行分析。划定4个地理区域，每个区域下设多个采样站。分别为西北区（采样点1-3）、北部区（4-15）、中部区（16-25）、南部区（26-40），结果表明，滇池外海水质劣于V类（地表水环境质量标准）标准，进入超富营养化状态，仅适合工农业用水。总体污染状况如下：西北地区最严重，北部地区最差，中部地区最差，南部地区次之。此外。污染空间分布与工农业分布相关。虽然总磷、溶解总磷、溶解磷、总氮的浓度。 Chla含量以西北地区最高，向西南方向下降，全磷峰值出现在北部地区东部，溶解磷峰值出现在南部地区和中部西部地区。不同月份污染程度差异较大，总氮浓度范围为IAI～10.27mg/L，总磷浓度范围为0.074～0.573mg/L，叶绿素浓度范围为0.0136～0.327mg/L。据观察，汛期（5月至9月）污染最严重，冬、春季污染相对较好。揭示了滇池污染现状及污染时空分布，为滇池污染分区治理提供理论参考。最后探讨了滇池富营养化的成因，并对可能的富营养化防治提出了建议。
After decades of economic reform and booming industry development, a tremendouds amount of pollutant were discharged into the Dianchi lake and the lake is suffered from severe eutrophication. In order to investigate the pollution situation of the Dianchi lake, forty sampling locations were set at Waihai of the Dianchi Lake and pH, DO, transparency, total-P, dissolved total-P, dissolved-P, total-N, NH3-N and Chla were analyzed monthly from Sep. 2001 to Aug. 2002. Four areas were defined geographical and each contains several sampling stations. They are the northwest area( sampling locations of 1-3) the north area (4-15) the middle area( 16-25) and the south area(26-40), The results showed that the water quality of Waihai in Dianchi lake was worse than the standard of V level( Environmental quality standards for surface water) jell into the super-eutrophication state, only suitable for industry and agriculture use. Generally, the pollution status is as following, the northwest area was the worst, the north area was worse, the middle area was bad I then the south area. In addition. the spatial distribution of pollution was correlative with the industry and agriculture distributions. Although the concentrations of total-P, dissolved total-P, dissolved-P, total-N and. Chla were the highest in the northwest area, and declined southwestward, a peak value of total-P was observed at the east part of the north area, and two peak values of dissolved-P were observed at the south area and the west part of the middle area. The contaminative degree was various greatly in different months, the concentrations scopes of total-N is from I A I to 10.27mg/L, total-P from 0.074 to 0.573mg/L, and Chla from 0.0136 to 0.327mg/L. It was observed that the pollution was worst in flood season (May to Sept.) while in winter and spring, the pollution was relatively better. The paper showed the pollution status and spatio-temporal distribution of pollution of Dianchi lake, which provided for the theoretic reference of divisional treatment Dianchi lake pollution. At last, the paper discussed the cause of eutrophication of the Dianchi lake, and gives some advice on the possible eutrophication prevention.