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城市湖泊富营养化及氮磷平衡研究——以湖北省黄石市青山湖1#湖区为例
施玉齐1, 吴晓东1,2, 葛绪广1,2, 周梦蝶1, 吴超1, 秦愿1, 谭亚1
1.湖北师范大学 城市与环境学院, 湖北 黄石 435002;2.黄石市土壤污染防治重点实验室, 湖北 黄石 435002
摘要:
[目的] 监测分析湖北省黄石市青山湖上游区域水质状况,为其生态修复提供依据。[方法] 以青山湖1#子湖区为例,采用综合营养状态指数法对其富营养化水平进行评价,依据物质平衡原理估算出青山湖上游区域氮磷收支状况。[结果] ①青山湖上游区域水体总氮、总磷年均浓度为2.45,0.200 mg/L;②青山湖上游区域水体达到中度富营养化水平;③上游来水是氮磷入湖主要来源;④氮入湖总量6 115.40 kg/a,出湖总量1 939.51 kg/a;⑤磷入湖总量411.14 kg/a,出湖量总量198.21 kg/a;⑥总磷、总氮截留率分别为68.28%,51.79%。[结论] 为防止青山湖上游区域富营养化程度加重,建议对上游来水采用生态浮床的措施,在净化水质,达到外源清水入湖的同时还能改善景观。在排口附近湖水区域,可采取高效原位强化净化处理措施。
关键词:  湖泊生态  青山湖上游区域  富营养化评价  氮磷平衡  氮磷负荷量
DOI:10.13961/j.cnki.stbctb.2020.03.030
分类号:X832
基金项目:湖北省教育厅项目“水位对沉水植物生长和光合荧光特性的影响”(Q20182502),“湖泊沉积物中重金属对矿产资源开发的响应及其迁移转化研究:以大冶湖为例”(D20152503);湖北师范大学湖泊流域重金属污染机理与生态修复创新团队项目和湖北省大学生创新创业训练计划项目(S201910513301,S201910513002)
A Study on Eutrophication and Balance of Nitrogen and Phosphorus in Urban Lakes -Taking No.1 Area of Qingshan Lake in Huangshi City, Hubei Province as a Case
Shi Yuqi1, Wu Xiaodong1,2, Ge Xuguang1,2, Zhou Mengdie1, Wu Chao1, Qin Yuan1, Tan Ya1
1.College of Urban and Environmental Sciences, Hubei Normal University, Huangshi, Hubei 435002, China;2.Huangshi Key Laboratory of Soil Pollution and Control, Huangshi, Hubei 435002, China
Abstract:
[Objective] The water quality in the upper area of Qingshan Lake in Huangshi City, Hubei Province was monitored and analyzed to provide a basis for its ecological restoration.[Methods] Taking No.1 area of Qingshan Lake as a case study, using a comprehensive trophic status index, the state of eutrophication in upper area of Qingshan Lake was evaluated, and the nitrogen and phosphorus balance was estimated according to the material balance principle.[Results] ① The concentration of total nitrogen and total phosphorus reached 2.45 and 0.200 mg/L, respectively. ② The water quality of Qingshan Lake reached a level of moderate eutrophication. ③ The input of P and N mainly came from the upper stream. ④ The total input amount of N was 6 115.40 kg per year, and the total output amount of N was 1 939.51 kg per year. ⑤ The total input amount of P was 411.14 kg per year, and the total output amount of P was 198.21 kg per year. ⑥ The rates of retained N and P were 68.28% and 51.79%, respectively.[Conclusion] According to the results, to prevent the eutrophication of Qingshan Lake, an ecological floating bed for the upstream water should be adopted, which will simultaneously purify the water and improve the landscape. In the lake water area near the discharge outlet, high-efficiency in situ enhanced purification measures could be adopted.
Key words:  lake ecology  the upper area Qingshan Lake  eutrophication assessment  balance of nitrogen and phosphorus  load of nitrogen and phosphorus