福建省主要江河入海口水质状况及其变化趋势研究

根据2010年-2013年福建省主要江河入海口每月一次的监测调查资料,评价2013年的入海口水质现状和富营养化程度,分析2013年的月变化和2010年-2013年的年际变化.结果表明,2013年福建省11条主要江河入海口水质均为劣四类海水水质,富营养化程度高且磷限制特征明显.入海口的石油类和化学需氧量的月变化和年变化受降雨影响大,高值区主要在降雨多的月份和年份,入海口的无机氮和活性磷酸盐含量受水中浮游植物和降雨量双重影响,夏秋低,春冬高,年际变化受年际降雨量变化影响有所波动,但大部分入海口的无机氮和活性磷酸盐含量呈略微上升的趋势.

Study on Present Situation and Tendency of Water Quality of Main Estuary in Fujian Province

Base on the monthly monitoring data of water quality of the main estuary in Fujian province from 2010 to 2013, the present situation and the eutrophication of the estuary in 2013 were evaluated; monthly variation in 2013 and annual variation from 2010 to 2013 were analyzed. The result showed that the water quality of 11 main estuary in Fujian province in 2013 beyond the fourth seawater quality standard, showing eutrophic and characteristic of phosphorus limitation. Monthly variation and annual varia- tion of coneentrationof petroleum and CODwere affected by rainfall, petroleum and COD was high in the years and months with high rainfall. Monthly variation of inorganic nitrogen and active phosphorus were affected by the rainfall and phytoplankton growth, high in summer and autumn, low in spring and winter, annual variation was affected by the annual rainfall had year＇s vol- atility, but most of the estuary had slightly increases of inorganic nitrogen and active phosphorus.