鄱阳湖典型区段水体氮磷等污染发生频率与成因特征研究

收集整理了鄱阳湖饶河段2个国控监测点2007-2011年富营养化氮磷指标的监测数据,分析了饶河段乐安江和昌江监测断面氮磷等污染的发生频率。结果表明:饶河昌江断面水质Ⅴ和劣Ⅴ级氨氮污染的月发生频率为2.17%,Ⅳ级氨氮污染的月发生频率为6.52%,而饶河的乐安江断面水质Ⅴ和劣Ⅴ级氨氮污染的月发生频率分别为13.04%和23.91%,Ⅳ级氨氮污染的月发生频率为15.22%,同时还发现饶河乐安江断面水质劣Ⅴ级氨氮和磷复合污染的月发生频率为28.26%,Ⅳ和Ⅴ级氨氮和磷复合污染的月发生频率为2.17%。最后在上述研究的基础上,对饶河段氮磷等污染的时空变化成因进行了分析。

Frequency and causes characteristics of nitrogen and phosphorus pollution in typical section of Poyang Lake

The monitoring data of nitrogen and phosphorus in eutrophication were collected and compiled,which was from 2 national routine monitoring sites in Raohe River of Poyang Lake from 2007 to 2011,and the frequency of nitrogen and phosphorus pollution in the monitoring section of Le’an River and Chang River of Raohe river was analyzed.The results showed that the monthly frequency of ammonia nitrogen pollution of Ⅴ and bad Ⅴwater quality in Chang River section of Rao River was 2.17%,and Ⅳ water quality was 6.52%.In addition,The monthly frequency of ammonia nitrogen and phosphorus composite pollution of bad Ⅴwater quality in Le’an River section of Rao River was 28.26%,Ⅳ and Ⅴ water quality was 2.17%.Finally,the cause of the time and space changes of nitrogen and phosphorus pollution was analyzed in Rao River section based on the above research foundation.