鄱阳湖富营养化状况调查与评价

为了较全面地了解鄱阳湖的富营养化状况，鄱阳湖水文分局曾于１９９２年５月１６日￣６月３０日、１９９３年１月５日￣２月４日进行了鄱阳湖平、枯水期富营养化状况调查。研究结果表明：在平水期，１１．１％的湖区属富营养，７７．８％的湖区及６０％的河口属中－富营养；在枯水期，２５％的湖区属富营养，７５％的湖区及６６．７％的河口属中－富营养；河口以赣江南支口、信江东支口，湖区以蛇山至都昌（鄱阳湖南部部分水域）的营

Survey of eutrophication status in Poyang Lake

In order to find out the conditions of water eutrophication in the PoyangLake, surveys were conducted on its water quality during May 16 to June 30, 1992 normalflow period and January 5 to February 4, 1993 low flow period. Survey results show that during normal flow period,the water quality in the lake area of 11. 1 % is eutrophic,and in thelake area of 77. 8% and 6o% estuary sections of rivers running into the Poyang lake medibum-eutrophic;during low flow period, 25% lake area eutrophic,ariti 75% lake area and 66. 7%estuary section medium-eutrophic;among estuary sections, in the southern branch of Ganjiang River and the eastern branch of Xinjiang River,and in the lake area between Sheshanand Duchang,there are higher nutrient contents,mainly including T-P,T-N,NO3-N andNH4-N. However,in view of current general status of water quality,in the estuary sectionsand the lake area,and around the habitat of migrantory birds,the quality of water.is medium-eutrophic during normal and low flow periods. The corrective measures are suggested asfollows:to establish the water resources protection agency for Poyang Lake so as to unitizedly manage the development, monitoring, protection and legislation for water resources; tostrengthen the further research;to control the pollutant discharges from the cities located along five rivers running into Poyang lake; to control the soil and water loss in the PoyangLake district to relieve the impact of nutrients in the runoff on the quality of water in thePoyang Lake.