摘要
瀛湖作为南水北调中线工程丹江口水库的重要水源地,水环境质量状况日益受到各方关注。对近五年(2016~2020年)瀛湖水质状况及富营养化现状进行综合评价,同时采样SPSS软件对2020年瀛湖366组日均值水质监测数据统计分析,结果表明:近五年(2016~2020年)瀛湖均处于中营养化水平;在气温回升的3月份,瀛湖pH值和溶解氧出现全年最大值,在气温最高的8、9月份水温、浊度、总磷、叶绿素和藻密度浓度为全年最高,水体电导率、总氮浓度为全年最低;总氮和藻密度呈显著负相关,总磷和藻密度呈显著正相关。分析表明磷是瀛湖藻类生长的限制性营养盐,瀛湖富营养化控制应以集中控磷为主。为瀛湖水体富营养化控制和水环境治理提供了科学依据。
As an important water resource of Danjiangkou Reservoir,part of the middle route of the south-north water diversion project,water envirionment of YingHu lake has been paid more and more attention in recent years.The water quality and eutrophication status of Yinghu Lake in recent five years(2016~2020)were comprehensively evaluated,and SPSS software were applied to analyze the water quality variation based on 366 sets of data.The results showed that the YingHu lake was at the medium trophic levelin the year of 2016~2020,and the maximum monthly mean of pH and DO was appeared in Mar.when the temperature rises,the maximum monthly mean of water temperature,turbidity,TP,Chl-a and algal density was appeared in Aug.and Sep.when the highest temperature appeared,while the monthly mean of water conductivity and TN was the lowest of the whole year.Algae density exhibited apparent positive correlation with TP while negative correlation with TN.Phosphorus is one of the major limiting factors for algae growth in YingHu Lake,and the eutrophication control of Yinghu Lake should be focused on phosphorus.This study provides scientific basis for eutrophication control and water environment management of YingHu Lake.
作者
豆艳霞
何云勇
冯莎
DOU Yan-xia;HE Yun-yong;FENG Sha(Environmental Monitoring Station of Ankang,Ankang,Shaanxi 725000,China;Hanbin Environmental Monitoring Station of Ankang,Ankang,Shaanxi 725000,China)
出处
《四川环境》
2023年第4期150-155,共6页
Sichuan Environment
关键词
瀛湖
水质变化
富营养化
外源磷输入
内源磷释放
YingHu Lake
water quality variation
eutrophication
external P pollution
endogenous P pollution
