CHEN H, CHEN Y Y, JIN Y S.Spatial distribution characteristics and eutrophication assessment of nitrogen phosphorus of typical tributaries in Danjiangkou Reservoir Area[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(2):62-70.

doi:10.16186/j.cnki.1673-9787.2022010035

Received:2022/01/12

Revised:2022/02/21

Published:2023/03/25

Spatial distribution characteristics and eutrophication assessment of nitrogen phosphorus of 

typical tributaries in Danjiangkou Reservoir Area

CHEN Hao, CHEN Yiyan, JIN Yingshu

School of Emergency Management，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:In order to explore the differences of nitrogen and phosphorus concentrations and their nutritional status in different tributary water bodies in the Danjiangkou Reservoir Area，the water ecological environment of 6 main tributaries in Danjiangkou Reseviror Area（Laoguan River，Qi River，Tao River，Shending River，Si River and Guanshan River） was investigated in October，2019.The results showed that：（1）The average concentrations of TN in Laoguan River，Qi River，Tao River，Shending River，Si River and Guanshan River were 7.62，10.08，7.40，11.58，8.34，6.81 mg/L，respectively，and the average concentrations of TP were 0.08，0.40，0.02，0.29，0.05，0.05 mg/L，respectively；（2）The comprehensive eutrophication indexes of Laoguan River，Qi River，Tao River，Shending River，Si River，and Guanshan River were 70.39，79.43，67.35，79.23，69.68，71.10，respectively.The study found that the typical inflow tributaries were all at different degrees of eutrophication.Among them，Laoguanhe，Qihe，Shendinghe and Guanshan rivers were in a state of severe eutrophication，and Taohe and Sihe were in a state of moderate eutrophication；（3）The nitrogen and phosphorus levels in the Qi River and Shending River were significantly higher than those of other tributaries，and they should be the key basins for comprehensive water environment management in the reservoir area in the future.

Key words:Danjiangkou Reservoir;nitrogen;phosphorus;eutrophication

 009_2022010035_陈昊_H.pdf