丹江口水库水质要素变化特征及其相互关系

采用丹江口水库1987－1996年间的水环境常规监测资料，应用因子分析方法探讨了丹江口水库不同区域水环境要素变化特征及其相互关系，分析表明：丹江口水库目前水质良好，大多数情况下能满足地面水一类水质标准要求：库区不同断面水体水质要素及污染因子间的相互关系可以用6个主导因子表达。同一主导因子不同断面标识因子的差异反遇了库区不同区域水质分布差异及产生这种差异的环境过程；影响库区水质的主要因素是上游随降水产生的面源污染、库周点源排放、水体自净以及气候因素，不同断面水质影响因素及其程度存在差异。

VARIATION AND CORRELATION OF ENVIRONMENTAL PARAMETERS IN THE WATER OF DANJIANGKOU RESERVOIR

Based on the routine monitoring in Danjiangkou Reservoir duringthe period from 1987 to 1996,factor analysis method was employed to discuss the variation and correlation of water quality parameters in the Reservoir.In most cases,the water quality in the reservoir meets the requirement for the first-class standard of surface water quality.The variation and correlation of water quality parameters may be expressed in six factors.For the same factor the difference in identifying parameters of different sections reflect the difference of water quality and its cause among sections in the reservoir.The reservoir water quality is influenced by non-point source pollution,waste water discharge of the factories around the reservoir,climate and water body decay capacity,but this influence may differ in different sections.