观山湖氮磷浓度与水质因子关系研究

目的]研究观山湖氮磷浓度与水质因子的关系。方法]对观山湖水体氮磷及相关水质因子进行了含量监测,分析观山湖氮磷浓度水质特征及水体中氮磷不同形态浓度与水质因子之间的相关性,利用多元逐步回归方程分别建立氮磷浓度与水质因子的关系。结果]亚硝酸盐氮(NO_2~--N)与总氮(TN)呈显著负相关,硝酸盐氮(NO_3~--N)与叶绿素a(Chla)、总磷(TP)及氨氮(NH_4~+-N)均呈显著正相关,氨氮(NH_4~+-N)与叶绿素a(Chla)及硝酸盐氮(NO_3~--N)也呈显著性正相关,氨氮(NH_4~+-N)的模型中仅与叶绿素a(Chla)有关。总磷(TP)浓度与叶绿素a(Chla)、可溶性磷(DP)、硝酸盐氮(NO_3~--N)呈显著正相关,可溶性磷(DP)与叶绿素a(Chla)及硝酸盐氮(NO_3~--N)呈正相关。总磷(TP)和可溶性磷(DP)的模型都仅与叶绿素a(Chla)有关。结论]观山湖总体水质良好,未达到富营养化。

Study on Relationship between Nitrogen,Phosphorus Concentration and Water Quality Factors in Guanshan Lake

Objective] The aim was to study the relationship between nitrogen, phosphorus concentration and water quality factors in Guans-han Lake.Method] Based on the measurement results of nitrogen, phosphorus and relevant water quality factors in Guanshan Lake, the wa-ter quality features were analyzed, as well as the correlation between different forms of nitrogen and phosphorus concentrations in water and wa-ter quality factors.The relationship between nitrogen, phosphorus concentration and water quality factors was established by using the multiple stepwise regression equation. Result] Nitrite nitrogen and total nitrogen was significantly negatively correlated.Nitrate nitrogen and chloro-phyll a, total phosphorus and ammonia were significantly positively correlated.Ammonia nitrate was positively correlated with nitrate nitrogen and chlorophyll a, whose model is only related with chlorophyll a.Total phosphorus concentration and chlorophyll a, dissolved phosphorus, ni-trate nitrogen was significantly positive correlation.Dissolved phosphorus was positively correlated with nitrate nitrogen and chlorophyll a, while total phosphorus and dissolved phosphorus iwa only related with chlorophyll a in its model. Conclusion] The overall water quality of Guanshan Lake is good and has not reached the eutrophication.