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东江中游水质时空分异特征及影响因素研究
引用本文:张苒.东江中游水质时空分异特征及影响因素研究[J].环境监测管理与技术,2014,26(3):30-34.
作者姓名:张苒
作者单位:广东省环境监测中心
摘    要:运用多元统计方法,对东江中游水质自动站(河源临江站和惠州剑潭站)2009-2012年水质监测数据进行时空分异特征及影响因素研究。结果表明:水站水质在Ⅰ类~Ⅲ类之间;空间特征差异为 T 与 TB 差异不显著,pH 值、EC、DO、IMn、NH3-N 及 TP均存在极显著差异;水期体征差异为河源临江站除 DO各水期差异显著外,其他指标差异不明显,惠州剑潭站 pH值、EC、IMn与 TP各水期均呈显著差异,NH3-N 水期差异不显著。Pearson 相关性分析表明,T 是制约河源临江站水体 DO的主要相关因子,营养盐作用相对较低;惠州剑潭站水体 DO 与 T、TP及 IMn呈极显著负相关关系。通过因子分析,识别出影响惠州剑潭水质的主因子,量化了水体理化性质、地表径流及人为污染对水质变化的贡献。

关 键 词:时空分异  水质  自动监测  东江

Spatial Temporal Variation and Influential Factors Analysis of Middle Dongjiang River
ZHANG Ran.Spatial Temporal Variation and Influential Factors Analysis of Middle Dongjiang River[J].The Administration and Technique of Environmental Monitoring,2014,26(3):30-34.
Authors:ZHANG Ran
Institution:ZHANG Ran ( Guangdong Environmental Monitoring Center, Guangzhou, Guangdong 510280, China)
Abstract:Based on data collected by water quality auto-monitoring stations (Heyuan Linjiang and Huizhou Jiantan stations)located at the middle section of Dongjiang river from 2009-2012,the spatial and temporal vari-ation and influential factors were evaluated by multi-variate statistical models.The results reveal that water quality of both stations has been maintained betweenⅠ~Ⅲ level for the last few years.Spatial temperature and turbidity differences are insignificant while pH,EC,DO,IMn,NH3-N and TP show a significant difference.Pollutants con-centration differences of Heyuan linjiang station were temporally in-significant except for DO.Differences at Huizhou jiangtan station are temporally significant except for NH3-N.Through Pearson correlation analysis,water temperature is closely related to DO but not with entropic species.DO at Huizhou Jiantan station is intimately re-lated to water temperature,TP and IMn.Finally,through factor analysis,three major factors are extracted to reflect water physical-chemical characteristics,surface runoff and human effects on water quality.
Keywords:Temporal and spatial variation  Water quality  Automatic monitoring  Dongjiang river
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