汉江堵河流域地表水质时空变化特征 |
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引用本文: | 顾胜,李思悦,张全发. 汉江堵河流域地表水质时空变化特征[J]. 长江流域资源与环境, 2005, 18(1): 41-41 |
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作者姓名: | 顾胜 李思悦 张全发 |
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作者单位: | 1.中国科学院武汉植物园, 武汉 430074; 2.中国科学院研究生院, 北京 100049 |
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摘 要: | 对汉江堵河流域9个点位为期1年的地表水水质理化特性进行时空特征分析,应用〖WTBX〗t〖WTBZ〗检验进行水质季节性变化分析,聚类分析进行空间相似性分析以确定空间尺度的分类情况,判别分析识别显著性指标,并以此反映上述空间聚类分析结果的差异性。结果表明:①Cl-、总溶解性固体(TDS)及浊度(Turbidity) 3项指标没有表现出显著的时间差异性;②温度、pH、NO-3、TP表现为丰水季显著大于枯水季,而SO2-4、HCO-3、NH+4、 DO则表现出相反的变化趋势,即枯水季显著大于丰水季;③空间聚类分析将采样点分为4类;④判别分析体现出良好的指标降维能力,仅需4个指标(NO-3、TDS、SO2-4、HCO-3)即可反映整体水质的空间差异性。
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关 键 词: | 聚类分析 判别分析 水质 时空变化 堵河 |
PATIAL TEMPORAL DISTRIBUTION OF SURFACE WATER QUALITY IN THE DU RIVER BASIN |
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Affiliation: | 1.Wuhan Botanical Garden,Chinese Academy of Sciences, Wuhan 430074, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract: | Multivariate statistical techniques including cluster analysis and discriminant analysis were performed on a water quality data set collected in 9 sites of the Du River in Hubei Province during 2006~2007,aiming at identifying spatial temporal characteristics of water quality,assisting watershed management and water resource protection and utilization.The results indicate that water quality had significant seasonal variations except Cl-,TDS and Turbidity.Temperature,pH,NO-3,TP is significantly higher in flood seasons than in dry seasons,while SO2-4,HCO-3,NH+4,DO show the opposite trend,that is,in flood season significantly lower levels are observed than in dry season.Grouping the sampling sites based on cluster analysis and recognizing the discriminant parameters based on discriminant analysis which can account for most of the spatial variation in water quality.The sampling sites are classified into 4 classes.Only four discriminant parameters (NO-3,TDS,SO2-4,HCO-3) are identified in discriminant analysis for 4 clusters,which can reflect the overall water quality of the spatial variation. |
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Keywords: | cluster analysis discriminant analysis water quality spatial temporal patterns Du River |
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