2004年淮河流域水质状况和聚类分析

Water quality and cluster analysis of Huaihe River Basin in 2004

根据2004年淮河流域水体水质监测资料，采用综合污染指数评价法评价分析淮河流域总体、干流及12个主要断面的水质状况，并与“九五”期间和2001—2003年淮河流域水质进行比较，还对12个主要断面进行聚类分析。结果表明,2004年总体水质污染程度为中度污染，水质好于2001～2003年；水质V类和劣V类之和由“九五”期间的58％降至39％；干流1月、2月和12月水质较差，6月至9月水质较好；属严重污染的断面有4个。聚类分析的结果为12个主要断面分6组较合理。

According to the monitoring data of water quality in Huaihe River Basin in 2004, the comprehensive pollution index method was adopted to analyze the water quality status of the whole river basin, the main streams and 12 main sections. The water quality data were ctanpaved with those in “the Ninth Five-Year Plan Period” and from 2001 to 2003. A cluster analysis of 12 main sections was carried out. The result showed that the water quality status in 2004 was medium pollution, better than that from 2001 to 2003. The percentage of waters up to or worse than the fifth water quality standard decreased from 58% in the “Ninth Five-Year Plan Period” to 39%. The water quality of main streams was worse in January, February and December, and better from June to September. Four sections were serious polluted. Ouster analysis showed that the 12 sections could be classified into six groups.