承德避暑山庄湖水污染现状调查与分析

Investigation and Analysis of Pollution in Chengde Summer Resort Lakes

依据承德市环境监测中心站2009-2013年避暑山庄湖水监测资料,研究承德避暑山庄湖水污染特征、变化趋势,分析叶绿素a的影响因素。研究表明,近5年避暑山庄湖水总氮超标率为100%,总磷和生化需氧量的超标率均为10%,其它项目监测结果达到国家Ⅳ类标准功能区划要求;用spearman秩相关系数法,对四个监测点位水质类别及主要营养物质年际变化趋势进行检验,结果表明无明显变化;皮尔逊积距相关性分析表明,叶绿素a与总氮、总磷及氮磷比没有显著相关性。

Based on the 2009 -2013 Mountain Resort lake monitoring data of Chengde city environmental monitoring center, Mountain Resort, the paper discusses the characteristics and water pollution trend of Chengde city, as well as influence factor analysis of chlorophyll a. Research shows that in recent 5 years in Chengde city, the total nitrogen of Mountain Resort water exceeds the standard rate by 100% , exceeds the standard rate of TP and biochemical oxygen demand by 10% , other project monitoring results reach the national four standard function zoning requirements. By using Spearman rank correlation coefficient method, tests are carried out on the four monitoring points of water quality categories and main nutrition change trend, the results show no obvious change. Correlation analysis shows no significant correlation in the accumulation, chlorophyll a and total nitrogen, total phosphorus and nitrogen and phosphorus.