摘要
景观湖一般为封闭水域。其水深较浅,水体自净能力较弱;水质易恶化及发生富营养化,影响水体的景观效果。文章监测天津职业大学景观湖水质,并依据《景观娱乐用水水质标准》(GB12941-91) C类和《地表水环境质量标准》(GB3838-2002)Ⅴ类标准分别评价2015-05和2015-11的水质状况。景观湖西侧有多处喷泉,分别在湖西侧和东侧设监测点1和监测点2。依据景观水标准(C类)评价,2015-05的水质参数有3项超标(透明度、氨氮、总磷);而2015-11的水质参数都达标。依据地表水标准(Ⅴ类)评价,2015-05的水质参数有3项超标(总氮,化学需氧量,总铁); 2015-11有1项指标(总氮)超标。应用综合营养指数法评价水体营养化,该景观湖在2015-06～08为重营养化,2015-04～05、2015-09～10为中度营养化,2015-01～02、2015-11～12是轻度富营养化。在喷泉启动期间(2015-05～09),监测点1的水质好于监测点2。建议通过种植水生植物、用再生水补给水量,以改善景观湖水质并减少其富营养化状况。
Landscape lake is usually an enclosed water body.The depth of water is relatively shallow and the self-purification capacity of water is weaker.Water quality is easy to deteriorate and to be eutrophicated,which affects its scenic effect.This article monitored the water quality of landscape lake in Tianjin Vocational Institute,and evaluated the water quality in May 2015 and November 2015 according to the "Water Quality Standard for Landscape and Entertainment" (GB12941-91)C and "Environmental quality standard for surface water"(GB3838-2002)V respectively.There are some fountains in the west of the landscape lake.Site 1and site 2were selected respectively in the west and the east of the lake.On the monitoring of May 2015,according to the former standard,transparency,ammonia nitrogen and total phosphorus exceeded the limit; while according to the latter standard,total nitrogen,chemical oxygen demand and total Fe exceeded the limit.On the monitoring of November 2015,according to the former standard,all water parameters approach the standard;while according to the latter standard,total nitrogen exceeded the limit.Based on these monitoring data,comprehensive eutrophication state index was applied to assess the lakeg eutrophication level.In June,July and August 2015,the lake was hyper -eutrophic; in April,May,September and October,the lake was middle -eutrophic;in November,December, January and February,the lake was light -eutrophic.When these fountains were operated from May to September,the water quality of site 1 was less polluted than site 2.Measures should be taken to improve the water quality and reduce its eutrophic,such as planting hydrophyte and reusing water to supply its water quantity.
作者
佟玉洁
刘炳光
王韬
TONG Yu -jie;LIU Bing-guang;WANG Tao(Tianjin Vocational Institute,School of Biological and Environmental Engineering,Tianjin 300222,China)
出处
《盐科学与化工》
CAS
2018年第11期7-12,共6页
Journal of Salt Science and Chemical Industry
基金
天津职业大学科学研究基金项目(20111107)
关键词
景观水
水质评价
富营养化
环境标准
Scenic water
Water quality assessment
Eutrophication
Environmental standard
