欢迎访问《环境监测管理与技术》编辑部网站！

文章摘要

基于稳定同位素示踪技术的南京典型农业面源氮定量溯源

Quantitative Traceability of Nitrogen from Typical Agricultural Non point Source in Nanjing by Stable Isotope Tracer

DOI：

中文关键词: 稳定同位素农业面源硝酸盐污染来源解析太湖流域

英文关键词: Stable isotope Agricultural non point source Nitrate Analysis of pollution sources Taihu basin

基金项目:国家自然科学基金资助项目（41230640）

作者	单位
谢馨	江苏省南京环境监测中心
夏成红	江苏省南京环境监测中心
张守斌	中国环境监测总站，国家环境保护环境监测质量控制重点实验室
吴礼军	南京大学地球科学与工程学院

摘要点击次数: 293

全文下载次数: 229

中文摘要:

选取太湖流域南京高淳松溪河汇水区域为典型农业面源研究区，基于野外调研、常规监测及稳定氮同位素示踪技术，阐明了研究区水化学及不同形态氮的分布特征，定量解析了研究区不同污染源对重点断面的NO-3贡献比例。结果表明：平水期研究区地表水中TN质量浓度范围为237mg/L～689mg/L，以NO-3为主，占TN的388%～946%。氮污染主要受内污染源影响，贡献占比达676%，其中来自生活源的NO-3对松溪河汇水区域贡献最大，占比为299%，农田径流次之，贡献占比为200%；外污染源中上游进水对区域内NO-3贡献占比为251%，大气沉降贡献占比为73%。落蓬湾国考断面氮污染主要来源于上游汇水范围内的农田径流，贡献占比为274%，其次为水产养殖，贡献占比为217%。

英文摘要:

Taking Songxi River drainage area in Gaochun， Nanjing， in Taihu basin as a typical agricultural non point source research region， based on field investigation， routine monitoring and nitrogen stable isotope tracer， the distribution characteristics of hydrochemistry and different forms of nitrogen in the research region were clarified， and the contribution of different pollution sources to NO-3 at key sections in the research region were quantitatively analyzed. The results showed that the mass concentration of total nitrogen in surface water during normal water season was from 237mg/L to 689mg/L， with NO-3 being the main component， accounting for 388% to 946% of total nitrogen. Nitrogen mainly came from internal pollution sources， accounting for 676%. Among them， the contribution of domestic sources to NO-3 in Songxi River drainage area was the greatest， accounting for 299%， followed by agricultural runoff， accounting for 200% of the contribution. Among the external pollution sources， the contribution of upstream water to NO-3 in the region accounted for 251%， and the contribution of atmospheric deposition accounted for 73%. At the national assessment section of Luopeng Bay， nitrogen pollution mainly 〖GK!86mm〗came from agricultural runoff in the upstream drainage area， accounting for 274%， followed by aquaculture with a contribution of 217%.

查看全文查看/发表评论下载PDF阅读器

关闭