摘要
为了了解三峡工程蓄水后对鄱阳湖的营养盐含量变化特征的影响,依据实测资料,对三峡蓄水后2005～2009年鄱阳湖的N、P营养盐的含量变化特征进行了研究。结果发现:三峡工程蓄水后,鄱阳湖的营养盐浓度季节变化特征仍然表现为较明显的洪季低、枯季高;但蓄水后鄱阳湖流量的变化对鄱阳湖营养盐平均浓度的升高以及出湖总量的增加具有一定的影响;鄱阳湖的营养盐变化在2009年表现的最为明显,2009年的NH4+年平均浓度比2005～2006年增长了0.2 mg/L,NO3-和PO34-的年平均浓度比2005～2006年增加了一个数量级。2009年鄱阳湖的营养盐出湖总量增加趋势明显,各营养盐出湖总量比2005～2008年的平均水平增长约为30%。
In order to study the impact of TGP impoundment on nutrient salts in Poyang Lake,the concentration characteristics of N,P nutrient salts after TGP impoundment from 2005 to 2009 are analyzed according to the monitoring data.The analysis results show that the seasonal variation of the concentration of nutrient salts in Poyang Lake is still obvious after TGP impoundment,which is lower in flood season and higher in dry season.But the change of water quantity caused by TGP impoundment makes a certain contribution to the increasing of average concentration of nutrient salts and total amount of nutrients out of the lake.The most obvious changes of nutrient salts appeared in 2009.Compared with the period of 2005-2006,the annual average concentration of NH4^＋ increased by 0.2 mg/L,and NO3^- and PO4^- incresed by a order of magnitude in 2009.The total amount of nutrient salts out of the lake increased evidently in 2009,with an average growth rate of about 30%.
出处
《人民长江》
北大核心
2011年第15期77-80,共4页
Yangtze River
基金
国家水体污染控制与治理科技重大专项(2008zx07526-008-03)
国际科技合作资助项目(2006DFB91920)
"十一五"国家科技支撑计划重点项目(2007BAB23CO2)
国家自然科学基金(40672159
41040032)
中国经济改革实施技术援助项目(支援期TCC5jxspyhzxh09-03)
关键词
营养盐
季节性
三峡工程
鄱阳湖
nutrient salt
seasonal variation
TGP
Poyang Lake
