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[摘要]
利用2012 年5 月至9 月太原市汾河公园蓄水池水华防治专项监测资料, 分析了1 号蓄水池叶绿素a( Chl2a) 的动态变化及与相关环境因子的关系。结果表明, 在整个研究期间, Chl2a 的波动较大, 浓度范围为20. 1 ~ 132. 0 mg/ m3, 均值为55. 553 mg/ m3 ; 5 月份Chl2a 含量总体上低于其它月份; Chl2a 含量总体上与水温( WT ) 、 COD、总磷( TP) 、氨氮( NH32N) 均呈现极显著的正相关, 与溶解氧( DO) 、总氮( TN) 、透明度( SD) 呈极显著负相关, 但与pH 值关系不显著。不过Chl2a 与环境因子的关系在不同时间段的表现有所差异: 水体Chl2a 含量在5 月份受 环境因子的影响不显著; 6 月份则显著受到有机质、总磷( TP) 、总氮( T N) 的影响; 7 月份受到有机质、TP、透明度 ( SD) 极显著的影响, 8 月、9 月份受到WT、T P、SD 的极显著影响。
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[Abstract]
Acco rding to the mo nitor ing data of w ater quality in the No . 1 r eser voir o f Fenhe Par k in Taiyuan from May to Sep2 tember 2012, the r elationships between chlor ophy ll2a concentr ations and envir onmenta l factor s ( w ater temperature ( WT) , pH , dissolved ox yg en ( DO) , o rg anic mat ter ( COD) , tota l nitr og en ( TN) , ammo nia nitro gen ( NH 32N) , tota l phospho rus ( T P) , and transpar ency ( SD) ) wer e investig ated. The results showed that there was an obvio us va riation of chlor ophyll2a concentr atio ns, ranging from 20. 1 to 132. 0 mg / m3 w ith a mean value of 55. 553 mg / m3 during the study per io d. The chlor ophyll2a concentr a2 tion was lower in May t han that in other months. Significantly posit ive cor relation w as fo und bet ween chlor ophyll2a concentr a2 tion and WT , COD, TP, and NH 32N, while significantly negative corr elation was found betw een chlo ro phy ll2a concent ratio n and DO, TN, and SD, but no t for pH . Mo reov er, the relatio nship betw een chlo ro phyll2a concent ratio ns and envir onment al factor s varied in different months. T he chlo ro phyll2a co ncentration was not sig nificant ly affected by env ir onmental factor s in May , sig2 nificantly affected by o rg anic matter, TP, and TN in June, significantly affected by or ganic matt er ( COD) , T P, and SD in July, and signif icantly affected by WT, TP, and SD in August and September.
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