湖北四湖流域排水沟渠水质指标的因子-聚类分析  

Factor-Cluster Analysis of the Water Quality Index of the Ditches in Sihu Watershed in Hubei

作　　者：金卫斌[1] 薛莲[1] 艾天成[1] 肖斌[1] 

机构地区：[1]长江大学农学院,湖北荆州434025

出　　处：《湖北农业科学》2010年第12期3033-3035,共3页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(40971113);湖北省自然科学基金创新群体项目(2006ABC013);湖北省国际合作项目(2007ABC027)

摘　　要：排水沟渠水质监测是研究湿地农业区域农业面源污染特征的基础。沿湖北四湖流域总干渠两岸采集了14个排水泵站所在沟渠水样,测定了EC、pH值、DO、COD、TN和TP6项水质指标,应用因子分析、聚类分析对该流域沟渠水质指标进行了分析。结果表明,沟渠水质的主导影响因子为水体氮、磷负荷;以3个主因子得分为依据进行聚类分析,将沟渠污染水平划分为4种类型,即重度、中度、轻度污染类型以及一个特殊的生物污染类型,其中属于重度、中度、轻度污染类型的沟渠分别位于流域总干渠的中游、上游、下游3个空间位置;属于特殊的生物污染类型的沟渠是洪湖出口处的万全泵站所在的沟渠,表现为溶氧低、耗氧高。Inspection to water quality of the ditches was the base work to study the characters of non-point source pollution in wetland agricultural areas. 14 water samples from ditches along the main channel of Sihu watershed were collected, and the water quality index（EC,PH, DO, COD, TN and TP） were tested and analyzed by t Factor and Cluster analysis methods. The results showed that the main factors which influence water quality were TN and TP, the 14 ditches were divided into 4 types： serious pollution, mid-serious pollution, little pollution and special pollution. The ditches with serious, mid-serious, little pollution located in mid-reach, upper-reach, lower-reach of the main channel respectively, and the special type with bio-pollution was located at the pump station named Wanquan station.

关 键 词：排水沟渠 水质 因子分析 聚类分析 

分 类 号：X824[环境科学与工程—环境工程]