Assessment of fisheries Environment Quality Status on
陕西红碱淖湖泊渔业环境质量状况评价

Based on the Single pollution index,the Comprehensive pollution index and Nutritional status index (Trophie station index), the fishery environment quality of Shanxi Hongjiannao lake water was evaluated according to the actual monitoring data in 2011, and the pollution trend and salinity changes of the Hongjiannao lake water was analysed by combing with the previous monitoring data and related information. The results showed that: the fishing waters of Hongjiannao lake was under heavy pollution , the major pollutants were pH, non-ionic ammonia, the TP, TN and CODMn ,and the pollution trend was upward between 2005 to 2011; the lake was in the eutrophic state, of which nitrogen was the limiting factor; since the 1980s, the lake salinity and hardness continues to rise, pose a serious threat to the survival of the freshwater fish.