The Study On The Pollutant Of Flux Of Lake Inflow In Poyang Lake Basin

Poyang lake is the largest freshwater lake,the "mother lake" in jiangxi province,and also a wetland of international importance,it plays a very important role in maintaining the ecological safety of our province and the middle and lower reaches of the Yangtze river region.The poyang lake water environment quality condition is the fundamental of the ecological environment of poyang lake,it is the most important environmental elements of poyang lake.1)From 2010 to 2014,the total amount of pollutants into the lake fluctuated,2010 and 2012 at a high level,the lowest value in 2011,due to changes in the total pollution into the lake by river flows into Lake rivers into the lake change influence,mainly affected the amount of river water quantity,2010 and 2012 for the wet year,relative to other content the larger the year.(2)From 2010 to 2014,every year through six ways(rivers into the lake pollution,industrial pollution,straight rows of straight row of domestic pollution in Poyang Lake,Lake non-point source pollution,aquaculture pollution and dust precipitation)into the lake total chemical oxygen demand was 2 million tons,939 thousand tons,2 million 73 thousand tons,1 million 339 thousand tons and 1 million 530 thousand tons.The six ways into Lake rivers into the lake pollution sharing rate is highest,up to 95.5% to 98.3%,followed by lake non-point source pollution,the share rate in 1.4% to 3%,the other way into the lake were less than 1%.(3)From 2010 to 2014,every year through six ways into the Poyang Lake of ammonia nitrogen was 77 thousand tons,41 thousand tons,74 thousand tons,58 thousand tons and 70 thousand tons,the six kinds of ways to share the river into the lake into lake pollution is highest,up to 90.7% to 95.2%,followed by lake non-point source pollution,the share rate in 4.3% 8.5%,the other three lake approaches were less than 1%.2014 precipitation dust pollution sharing rate was 4.1%.(4)from 2010 to 2014 in Poyang Lake every year through six ways into the lake total phosphorus total was 26 thousand tons,7 thousand and 500 tons,13 thousand tons,9 thousand and 700 tons and 12 thousand tons,the six kinds of ways to share the river into the lake into lake pollution is highest,up to 75.2% to 93.1%,followed by lake non-point source pollution,the share rate in 6.3% 22.6%,aquaculture pollution share rate is 0.7% to 2.3%.(5)from 2010 to 2014 in Poyang Lake every year through six ways into the lake total nitrogen total was 271 thousand tons,128 thousand tons,244 thousand tons,167 thousand tons and 215 thousand tons,the six kinds of ways to share the river into the lake into lake pollution is highest,up to 87.7% to 94.5%,followed by lake non-point source pollution,the share rate in 5.1% ~ 11.5%,aquaculture pollution share rate is 0.3% to 0.7%.(6)In the four major pollutants,the chemical oxygen demand is the main pollutant,and its load is about 85%.(7)The main branch,Raohe,Fu Hedong branch,Jiangxi branch and the Branch letter in four kinds of main pollutants into the lake river into the lake,the other 5 rivers into the lake volume accounted for more than 75% of the total amount of rivers into the lake.(8)In a straight row of industrial source way,chemical oxygen demand into the lake the overall volume of the largest industry for chemical fiber industry,paper and paper products industry,the overall amount of ammonia into the lake the largest industry for chemical fiber industry,Agro food processing industry;in the straight row life way,Duchang County,Xingzi County and Jinxian county is the main lake in Lake region;non-point source way,Nanchang County,Jinxian County,Jiujiang County,Duchang County as the main lake area;in aquaculture way,Nanchang County,Poyang County,Yugan County,Duchang County as the main lake area.