【摘要】 为研究浅水湖泊冬季氮的空间分布特征,2010年冬季在湖北省两个典型的浅水湖泊(湖北省最大的远离城市的湖泊———洪湖和湖北省最大的城市湖泊———武汉东湖)进行了采样,分析得到湖水中总氮、氨氮、硝酸盐氮和亚硝酸盐氮的浓度值.结果表明,两个湖泊中氨氮浓度最高,硝酸盐氮次之,亚硝酸盐氮浓度最低,且洪湖冬季总氮、氨氮和硝酸盐氮浓度平均值大于东湖,亚硝酸盐氮浓度平均值则小于东湖.通过ARCGIS空间插值,得到两个湖泊冬季不同形态氮的空间分布图.结果表明,氨氮的空间分布趋势与总氮一致.排污口附近和受人类活动影响大的区域,各种形态氮的浓度值偏大.更多还原

【Abstract】 To study the spatial distribution characteristics of nitrogen in shallow lakes,the samples in two typical shallow lakes(Honghu Lake and East Lake) were analyzed in winter in 2010.Honghu Lake is the largest lake away from city in Hubei province,East Lake is the largest urban lake in Hubei province.Through the analysis in the laboratory,the total-nitrogen,ammonia nitrogen,nitrate nitrogen and nitrite nitrogen of two lakes were obtained.The results indicated that,in two lakes,the concentration of the ammonia nitrogen was the highest,the nitrate nitrogen second,and nitrite nitrogen the lowest.In addition,the average concentration of total-nitrogen,ammonia nitrogen and nitrate nitrogen in Honghu Lake were greater than these in East Lake in winter,the average concentration of nitrite nitrogen of Honghu Lake is lower than the one in East Lake in winter.The spatial distribution patterns of different nitrogen species in two lakes in winter were studied by the ARCGIS spatial interpolation.The results indicated that,the spatial distribution of the concentration of ammonia nitrogen was in agreement with the one of total nitrogen.The concentration of various forms of nitrogen near the sewage outlets and the space deep influenced by human activity were bigger.更多还原