长江流域资源与环境 >> 2009, Vol. 18 >> Issue (4): 373-.

• 生态环境 • 上一篇    下一篇

猫跳河流域梯级水库夏季N2O的产生与释放机理

刘小龙1|2| 刘丛强1*| 李思亮1| 汪福顺3| 王宝利1| 灌  |瑾1| 杨  |妍4   

  1. (1.中国科学院地球化学研究所环境地球化学国家重点实验室| 贵州 贵阳| 550002; 2.中国科学院研究生院| 北京| 100039; 3.上海大学环境与化工学院| 上海| 201800; 4.贵州大学资源与环境工程学院| 贵州 贵阳| 550003)
  • 出版日期:2009-04-20

PRODUCING AND RELEASING MECHANISM OF N2O IN CASCADE RESERVOIRS OF MAOTIAO RIVER IN SUMMER

LIU Xiaolong1|2| LIU Congqiang1| LI Siliang1| WANG Fushun3| WANG Baoli1| GUAN Jin1| YANG Yan4
    

  1. (1.The State Key Laboratory of Environmental Geochemistry| Institute of Geochemistry| Chinese Academy of Sciences| Guiyang 550002| China; 2.Graduate University of the Chinese Academy of Sciences| Beijing 100039| China; 
    3.School of Environmental and Chemical Engineering| Shanghai 201800| China; 
    4.Department of Resources and Environment| Guizhou University| Guiyang 550003| China
  • Online:2009-04-20

摘要:

为了研究河流筑坝对河流氮生物地球化学循环的影响,在夏季水体分层期间对猫跳河梯级水库坝前分层采集水样进行了相关地球化学分析。结果显示,在上游的两座水库存在2个明显的温度分层现象,并影响到了水体N2O的产生和分布。红枫水库整个剖面的氮分布主要受硝化作用控制,而百花湖、修文及红岩水库则表现为上层水体为硝化作用,中层为硝化反硝化共同作用。所有水库表层水和下泄水高饱和度的N2O含量表明这些水体为大气N2O的源。百花湖底层反硝化作用强烈,中间产物N2O大量消耗。底层泄水的方式对于温室气体释放影响重大,因此不同水库下泄水的N2O含量在时间和空间上的变化与水库运行和调蓄模式有关。研究结果表明,梯级水库过程对N2O的排放影响很大,在水电开发的环境保护中应当引起重视。

关键词: 氧化亚氮/ 富营养化/源汇效应/ 梯级水库

Abstract:

In order to make clear that what kind of impacts the cascade reservoirs play on the nitrogen biogeochemistry circle in the river, we sampled water by different layers in front of the each dam and outflow water in the cascade reservoirs of Maotiao River, Guizhou Province, Southwest China. The water chemistry of the cascade reservoirs is discussed in terms of the physical and chemical parameters, together with N2O distribution in summer. The results indicate that discontinuity layers of temperature plays an important role in production and distribution of N2O in reservoirs of Maotiao River. The N2O distribution in the layer above the SDL (secondary discontinuity layer) in the four cascade reservoirs is dominated by nitrification, while between the SDL and PDL (primary discontinuity layer) is controlled by both of nitrification and denitrification. As two main processes that affect the production of the N2O, nitrification and denitrification change the distribution of N2O in cascade reservoirs. The contents of N2O in reservoirs are higher than that in the atmospheres. This suggests that high contents of the N2O in the reservoir are the N2O source of the atmosphere. However, N2O contents decrease at depth below 15 m with low contents of DO indicates that denitrification produced N2 by consuming a large part of N2O. The water discharge from bottom of cascade reservoirs along Maotiao River released large amount of N2O into atmosphere, which should be taken into account for improving environmental protection of waters in cascade reservoirs when hydroelectric power will be developed.

Key words: nitrous oxide/eutrophication/sourcesink effects/cascade reservoirs

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 张宝雷,周万村,马泽忠,. 三峡地区主要地类的自动提取方法研究[J]. 长江流域资源与环境, 2005, 14(4): 445 -449 .
[2] 梁 彬,李兆林. 西南岩溶石山地区岩溶水资源合理开发利用模式[J]. 长江流域资源与环境, 2008, 17(1): 62 .
[3] 刘 伍,李满春,刘永学,毛 亮. 基于矢栅混合数据模型的土地适宜性评价研究[J]. 长江流域资源与环境, 2006, 15(3): 320 -324 .
[4] 燕乃玲,赵秀华,虞孝感. 长江源区生态功能区划与生态系统管理[J]. 长江流域资源与环境, 2006, 15(5): 598 -602 .
[5] 梁守真,李仁东,朱超洪. 洞庭湖区生态服务价值变化区域差异研究[J]. 长江流域资源与环境, 2006, 15(2): 196 -200 .
[6] 赵翠薇,濮励杰. 城市化进程中的土地利用问题研究——以江苏省为例[J]. 长江流域资源与环境, 2006, 15(2): 169 -173 .
[7] 曲福田,赵海霞,朱德明,张效军. 江苏省环境污染及影响因素区域差异比较研究[J]. 长江流域资源与环境, 2006, 15(1): 86 -92 .
[8] 吴后建,王学雷,宁龙梅,芦云峰. 土地利用变化对生态系统服务价值的影响——以武汉市为例[J]. 长江流域资源与环境, 2006, 15(2): 185 -190 .
[9] 荆平 贾海峰. 流域地下水质评价的GIS与模型集成分析[J]. 长江流域资源与环境, 2009, 18(3): 248 -253 .
[10] 王飞儿 徐向阳 方志发 俞洁. 基于COD通量的钱塘江流域水污染生态补偿量化研究[J]. 长江流域资源与环境, 2009, 18(3): 259 -263 .