洪湖及其周边水域若干水质指标的主成分分析

Principal Component Analysis of Some Water Quality Index in Honghu Lake and Periphery Water Area

2005年8月,在洪湖大面积撤除围栏之际,在洪湖及周边水域采集15个水体样本,对其主要水质指标进行测定,分析了洪湖水体的氮磷营养物浓度的状况,并且进行了主导因子分析,得出3组主成分。结果表明,围栏撤除前后水质有明显差异;洪湖属于中-富营养化水平,其中磷是影响因素之一;洪湖水质受到生物活动、离子属性、磷盐特性等主要因素的控制;人为干扰是洪湖水质下降的一大原因。

When the rails were removed,water body's physical and chemical property of Honghu Lake were analyzed on the base of 15 water samples collected in August,2005.The concentration of nitrogen and phosphorus were investigated.In application of principal components analysis,three leading control elements were put forward.The results showed that the water quality was different after the rails were removed;the water body of Honghu Lake was in eutrophication level,the phosphide was a factor of eutrophication;the water quality was mainly under the control of biological activity,followed by ionic attribute and phosphide;human disturb was a factor of the water quality descend of Honghu Lake.