水质站网规划研究中几个问题的探讨

Discussion on the Problems in the Water Quality Network Planning

在进行中国水质站网规划布设合理性研究中，按河流水系将全国国土划分为若干水质站网规划单元分区，然后运用主成分聚类方法进行单元分区类型的划分，作为水质站网规划的基础。在同一类型单元分区内，运用模糊集合聚类方法，将分区内的水质进行分类，以确定水质站的布设密度，并对每一水质参数的采样频次进行分析研究，以指导确定其采样频次。

In research on the suitability of the Water Quality Network Planning (WQNP) in China,the na-tional territory is divided into some water quality units according to the river systems.Then the categories of unitsare determined as a basis of WQNP by using a principal component cluster variety method.Within the units in thesame category,water quality parameters are classified by the fuzzy collective cluster method to determine the densi-ty of water quality networks.Meanwhile,sampling frequencies for each parameter are analysed to provide the con-cerned guidance.