春季盘溪河水质日变化规律及水质评价  

Diurnal Variation and Evaluation of Water Quality of Panxi River in Spring

作　　者：张千千[1] 王效科[1] 郝丽岭[2] 逯非[1] 欧阳志云[1] 侯培强[1] 

机构地区：[1]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [2]西南大学资源与环境学院,重庆400715

出　　处：《环境科学》2012年第4期1114-1121,共8页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07315);国家自然科学重点基金项目(41030744);城市与区域生态国家重点实验室自主项目(SKLURE2008-1-01);国家重点基础研究发展规划(973)项目(2010CB955904-03)

摘　　要：2010年春季对盘溪河水质进行了采样监测,分析了春季盘溪河水质的日变化规律,运用非参数检验、方差分析和灰色关联度方法评价了盘溪河1 d内的水质变化情况.结果表明,盘溪河的t、DO、COD、Pb、Cd、Zn和Cu在上、中、下游都没有显著性差异(P>0.05),pH、EC、TP、TSS、BOD5、NO3--N、TN和NH4+-N表现出显著性差异;盘溪河各水质参数日变化情况差别较大,TN、TP和EC的日变化趋势在上游呈波浪式逐渐增加,中游波动较小,下游呈"单峰单谷"型,峰值出现在中午12:00.COD变化曲线呈"单峰"型,上游和中游峰值都出现在10:00,下游的峰值在12:00;盘溪河Pb、Cd、Zn和Cu的浓度较低,中游Pb、Cd、Zn和Cu浓度的峰值出现在12:00;运用灰色关联度方法评价了盘溪河水质级别:上游在18:00和20:00为劣Ⅴ类,其余各时间段河流水质为Ⅱ类;中游在12:00时水质为劣Ⅴ类,其余各时间段河流水质为Ⅱ类;下游各时间段水质均为劣Ⅴ类.Based on the investigation of water quality of Panxi River in spring,2010,we assessed the diurnal variation of water quality in spring and the characteristics of water quality changes within a day by using non-parametric test,analysis of variance and grey relationship analysis.The results showed that the differences were not significant for t,DO,COD,Pb,Cd,Zn and Cu（P0.05） in upstream,midstream and downstream,but significant difference existed among the pH,EC,TP,TSS,BOD5,NO-3-N,TN and NH＋4-N contents.The diurnal variation of different water quality parameters presented distinct patterns： TN,TP and EC increased wavelike with time in upstream,fluctuated less in middle and showed the ＂single-peak single-valley＂ pattern in downstream,with the peak at 12：00.The diurnal variation of COD showed that ＂single-peak＂ pattern and with the peak at 10：00 in upstream and midstream and peak at 12：00 in downstream.The concentrations of Pb,Cd,Zn and Cu were low and peak at 12：00 in midstream;The grey relationship analysis indicated that the water quality in upstream was inferior to the Ⅴ class of surface water at 18：00 and 20：00 and were in the Ⅱ class of surface water for the rest hours,and the water quality in midstream was inferior to the Ⅴ class of surface water at 12：00 and were in the Ⅱ class of surface water for the rest hours;and the water quality in downstream was inferior to the Ⅴ class of surface water all time during investigation.

关 键 词：日变化 水质评价 非参数检验 方差分析 灰色关联度 

分 类 号：X143[环境科学与工程—环境科学]