专业英语作文-巢湖水体富营养化状况原因及治理措施.docx

现状The current situation of Chaohu LakeChaohu Lake ,covers an area of 760 square kilometers, is located in the central of Anhui province,?It is one of the five famous large fresh water lake in China.巢湖位于安徽省中部，湖区面积760平方公里， 是我国著名的五大淡水湖之一。巢湖流域处于长江和淮河两大河流之间, 境内入湖河流众多, 巢湖对流域社会经济的发展起着极为重要的作用。Chaohu basin is situated between the Yangtze river and Huaihe river ,where hundreds of rivers converge into the lake.It plays a very important role in the development of economy and society. 近年来, 随着巢湖流域工业化及城市化的迅猛发展, 巢湖水体呈现严重的富营养化状况, 湖中蓝藻爆发所引发的水质恶化、湖体生态系统衰退等一系列生态环境问题已引起国家的高度重视。In recent years,with the rapid development of industrialization and urbanization nearby Chaohu basin, there are serious eutrophication appearing in Chaohu lake, deterioration of water quality and lake ecosystem recession and a series of ecological environment problems which are caused by blue-green algae outbreaking has drawn great attention of our country. 从20 世纪80年代开始, 随着流域内人口和工农业生产的快速增长以及城市化进程的加快, 巢湖水体中N、P等营养负荷加重, 湖泊出现富营养化, 导致蓝藻爆发, 水体严重污染。安徽巢湖西半湖环湖河的塘西河、十五里河入巢湖口处及东半湖从西坝口至双桥河水域出现蓝藻集聚现象，。 Since the 1980 s,with the rapid growth of population,industrial and agricultural production in the basin and the speeding up of urbanization,the water body is loaded in a large amount of nitrogen and phosphorus. So it appears eutrophication in the lake,leading to the phenomenon that blue-green algae are concentrating and the water sends out blasts of peculiar smell成因The causes of the phenomenon 点源污染Point pollution source 目前, 巢湖流域有工矿企业3 000多家, 废水年排放量为1. 4亿t, 这些工矿企业多数为流域内的排污大户,所排放的污水大多未经处理即直接排放至巢湖。At present,Chaohu lake basin has three more than 3000 industrial and mining enterprises,who has discharged about 1. 4 million tons sewage ,most of which are not been disposed and then been directly discharged into Chaohu lake.农业面源污染Agricultural non-point source pollution 氮磷化肥施用比重过大，水产养殖饵料投放无序且在水体中残留较多，农村生活垃圾过度堆放。The proportion of nitrogen and phosphorus fertilizer proportion in Agricultural production is too large.Aquaculture ba