| 引用本文: | 陈晓玲,张媛,张琍,陈莉琼,陆建忠.丰水期鄱阳湖水体中氮、磷含量分布特征.湖泊科学,2013,25(5):643-648. DOI:10.18307/2013.0504 |
| CHEN Xiaoling,ZHANG Yuan,ZHANG Li,CHEN Liqiong,LU Jianzhong.Distribution characteristic of nitrogen and phosphorus in Lake Poyang during high water period. J. Lake Sci.2013,25(5):643-648. DOI:10.18307/2013.0504 |
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| 摘要: |
| 以2011年7月份鄱阳湖实测数据为参考,对鄱阳湖丰水期总氮(TN)、总磷(TP)空间分布特征及其影响因素进行了分析,并就鄱阳湖氮、磷营养盐结构特征及其与叶绿素a的相关性进行了探讨.结果表明:鄱阳湖氮、磷含量已经达到了发生富营养化的条件,且TN含量呈现由东向西、由南向北逐渐降低的趋势;TP在几个主要的采砂区,尤其是南北湖交界处污染最严重.鄱阳湖以磷限制为主,氮污染相对比较严重,且氮、磷不是鄱阳湖藻类生长的限制性因素.TN同时受悬浮泥沙和水流作用的影响,在上游航道受水流影响较大,在入江水道则主要受陆源污染的影响.TP含量则主要受悬浮泥沙和采砂活动的影响,受水流作用影响相对较小. |
| 关键词: 鄱阳湖 总氮 总磷 分布特征 丰水期 |
| DOI：10.18307/2013.0504 |
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| 基金项目:国家高技术研究发展计划"863"项目(2012AA12A304);国家自然科学基金项目(41101415,41071261);中央高校基本科研业务费专项资金项目(111044);水利部公益性行业科研专项项目(201001054);国家重点实验室仪器设备专项经费项目;鄱阳湖湿地与流域教育部重点实验室(江西师范大学)开放基金项目(PK2012005)联合资助 |
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| Distribution characteristic of nitrogen and phosphorus in Lake Poyang during high water period |
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CHEN Xiaoling1, ZHANG Yuan1,2, ZHANG Li1,3, CHEN Liqiong1, LU Jianzhong1
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1.State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, P. R. China;2.Hubei Province Environmental Monitoring Center, Wuhan 430072, P. R. China;3.Key Laboratory of Lake Poyang Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, P. R. China
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| Abstract: |
| Based on the measured concentration of total nitrogen (TN) and total phosphorus (TP) in Lake Poyang in July 2011,we analyzed the spatial distribution characteristic of TN,TP,and factors affecting them.The nutrient structure and the correlations among nitrogen,phosphorus and chlorophyll-a were discussed.The results show that: The concentration levels of nitrogen and phosphorus have already reached the threshold of eutrophication.TN content has a downward trend from the east part to the west part,and from the south part to the north part,in Lake Poyang.TP contents in several dredging areas were the highest,especially in the border area between south lake and east lake.Phosphorus was limited in Lake Poyang.Comparatively speaking,nitrogen pollution was more serious,and the nitrogen and phosphorus were not the restricting factors of eutrophication.TN content was influenced by suspended sediment concentrations (SSC) as well as the water flow.It was mostly affected by the water flow in the upstream channels which were largely influenced by the land-sourced pollutants.TP content was less affected by the water flow,but it was mainly influenced by the high SSCs and the dredging activities. |
| Key words: Lake Poyang TN TP distribution characteristic high water period |
