北京官厅水库砷和氨氮分布特征及水质变化  

Distribution of Arsenic,Ammonia Nitrogen and Changes of Water Quality in Beijing Guanting Reservoir

作　　者：王静[1] 尚鹤[1] 曹吉鑫[1] 林波[1] 

机构地区：[1]中国林业科学研究院森林生态环境与保护研究所,北京100091

出　　处：《湿地科学与管理》2012年第3期61-64,共4页Wetland Science & Management

基　　金：国家林业局948项目(编号:2008-4-37);科技部国家重点基础研究发展计划项目(编号:2006CB403307)资助

摘　　要：为研究北京市官厅水库湿地生态系统水环境改善状况,于2011年丰水期(9月)在水库采集表层水样52个,采用便携式水质监测仪和重金属分析仪对水库原典型污染物砷和氨氮的污染情况进行了检测。结果表明,表层水的T、pH、DO、NH4+-N和As5个指标分别为:22.5～25.8℃、8.57～8.98、17～9.61mg/L、0.13～0.36mg/L、1.94～6.52μg/L。同时结合ArcGIS技术对各指标的空间分布特征进行分析,可以看出,表层水DO和As空间分布差异显著(p<0.05),pH和氨氮差异不显著。官厅水库近几年水质有所好转,pH、氨氮转变尤为明显。综合分析可看出,官厅水库水库水质良好,除个别点外,上述指标均符合地表水II类标准。In order to investigate the water quality improvement of Guanting Reservoir wetland ecosystem in Beijing,52 surface water samples were collected during the high-flow period.The concentration of arsenic and ammonia nitrogen was detected with portable and high-precision instrument.The results showed that the concentration of T,pH,DO,NH4＋-N and As were in the range of 22.5～25.8 ℃,8.57～8.98,17～9.61 mg/L,13～0.36 mg/L,1.94～6.52 μg/L,respectively.The spatial distribution of each indicator was analyzed by using ArcGIS,and the results showed that the spatial distribution of DO and As had statistically significant difference（p0.05）,with no significant difference for pH value and NH4＋-N.Water quality has been improved in recent years,with more prominent improvements in pH and NH4＋-N.With rare exceptions,the reservoirs water qulity conforms to the level II of the National Standards of surface water.

关 键 词：官厅水库 砷 氮磷污染 湿地生态系统 

分 类 号：X131.2[环境科学与工程—环境科学]