青海湖湖水中氮的时空变化  

Spatially and Temporally Dynamic Variation of Nitrogen in Qinghaihu Lake

作　　者：严刚[1] 何玉邦 郑洁[1] 袁富升 

机构地区：[1]青海大学化工学院,青海西宁810016 [2]青海湖国家级自然保护区管理局,青海西宁810012

出　　处：《水电能源科学》2015年第9期49-52,共4页Water Resources and Power

基　　金：教育部春晖计划项目(Z2012076)

摘　　要：为揭示氮素在青海湖的分布情况,分析了青海湖湖水9个采样点135个水样的总氮、硝酸盐氮、亚硝酸盐氮和氨氮的浓度。结果表明,湖水总氮、硝酸盐氮、亚硝酸盐氮、氨氮平均浓度分别为4.334、2.160、0.007、0.843mg/L;不同测点氮素浓度变化较大,其中黑马河、布哈河、沙柳河浓度均较高,总氮、硝酸盐氮、亚硝酸盐氮、氨氮浓度范围分别为6.071-9.245、3.259-6.192、0.008-0.027、1.148-1.321mg/L,其余测点总氮、亚硝酸盐氮浓度较低,而硝酸盐氮、氨氮浓度较高。8月各测点水样中氮素浓度最高,6月氮素浓度最低。分析表明,青海湖湖水中氮的分布与转化受湖水理化性质及雨季氮的外源输入影响较大。For revealing nitrogen distribution in Qinghaihu Lake, dynamic changes of total nitrogen, nitrate nitrogen, nitrite nitrogen and ammonia concentrations in 9 representative sites of Qinghaihu Lake were studied with 135 water sample. The results show that the average concentrations of total nitrogen（TN）, nitrate nitrogen（NO3^-N）, nitrite nitrogen （NO/ N） and ammonia（NH/-N） in Qinghaihu Lake were 4. 334, 2. 160, 0. 007 and 0. 843 mg/L, respectively. The nitrogen concentration of different sites was different. The concentration of TN, NO3^-N, NO2^-N and NH4^＋-N in Buha River, Heima River and Shaliu River were higher than that of other sites and their concentration of TN,NO3^-N, NO2^- N and NH4^＋-N were 6. 071-9. 245, 3. 259-6. 192, 0. 008-0. 027 and 1. 148-1. 321 mg/L. The concentration of TN and NO2^--N were lower and the concentration of NO3^-N and NH4^＋-N were higher in other sites. The concentrations of nitro gen for each water sample at August were the highest and at June it was the smallest. The analytical results show that the distribution and transformation of nitrogen in Qinghaihu Lake were influenced by the characteristics of physics and chemistry and exogenous input nitrogen.

关 键 词：青海湖 总氮 硝酸盐氮 亚硝酸盐氮 时空变化 

分 类 号：X524[环境科学与工程—环境工程]