东洋河流域含氮量比较高，2004年通过地表径流带入水库的总氮量为292.8t，占全年入库总氮量的50.2%。
292.8 tons of total nitrogen in the surface runoffs of dongyang river flowed into Yanghe Reservoir in 2004 , which occupied 50.2 % of the whole total nitrogen flowed into the reservoir .
东洋河