洱海典型小流域丰水期农业面源氮污染来源解析

doi:10.11988/ckyyb.201908367

长江科学院院报 ›› 2020, Vol. 37 ›› Issue (10): 16-20.DOI: 10.11988/ckyyb.201908367

洱海典型小流域丰水期农业面源氮污染来源解析

潘雄^1,2, 林莉^1,2, 董磊^1,2, 谢玲娴^1,2, 黄华伟^1,2, 陈进²

1.长江科学院流域水环境研究所,武汉 430010;
2.长江科学院流域水资源与生态环境科学湖北省重点实验室,武汉 430010

收稿日期:2019-07-17 修回日期:2019-08-23 出版日期:2020-10-01 发布日期:2020-10-29
通讯作者: 林莉(1983-),女,湖北咸宁人,教授级高级工程师,博士,主要从事流域水环境治理与水资源保护研究。E-mail:linli1229@hotmail.com
作者简介:潘雄(1989-),男,湖北洪湖人,工程师,博士,主要从事水环境污染修复治理研究。E-mail:panxiong@zju.edu.cn
基金资助:
中央级公益性科研院所基本科研业务费项目(CKSF2017062/SH,CKSF2019433/SZ)

Sources of Agricultural Non-point Nitrogen Pollution in Typical Small Watershed of Erhai Lake in Abundant Water Period

PAN Xiong^1,2, LIN Li^1,2, DONG Lei^1,2, XIE Ling-xian^1,2, HUANG Hua-wei^1,2, CHEN Jin²

1. Basin Water Environment Department, Yangtze River Scientific Research Institute, Wuhan 430010, China;
2. Hubei Provincial Key Laboratory of Basin Water Resources and Ecological Environment, Yangtze River Scientific Research Institute, Wuhan 430010, China

Received:2019-07-17 Revised:2019-08-23 Online:2020-10-01 Published:2020-10-29

摘要/Abstract

摘要： 农业面源污染是近年来导致洱海水质不断恶化的主要因素。选取洱海地区典型小流域,分析了林地、耕地以及居民区地表径流中硝酸盐氮与铵态氮的氮、氧同位素特征,进而解析其来源。结果表明:林地径流中硝酸盐氮来源于大气降雨和土壤的比例分别为8.53%和91.47%,铵态氮来源于大气降雨和土壤的比例分别为19.78%和80.22%;耕地径流中硝酸盐氮来源于大气降雨、土壤和化肥的比例分别为5.90%,68.76%,25.34%,铵态氮则主要来源于土壤;居民区径流中硝酸盐氮来自于大气降雨、生活污水和动物粪便的比例分别为3.32%,55.42%,41.26%,铵态氮则主要来源于生活污水与动物粪便。研究成果为控制洱海流域农业面源污染提供了有效途径。

关键词: 洱海, 稳定同位素, 源解析, 农业面源污染, 无机氮

Abstract: Agricultural non-point source pollution is the main factor of the deterioration of water quality of Erhai Lake in recent years. We studied the inorganic nitrogen isotope characteristics in the surface runoff of forest land, cultivated land and residential area in a typical small watershed of Erhai Lake. Source analysis of inorganic nitrogen showed that 8.53% and 91.47% of nitrate nitrogen in forest runoff came from atmospheric rainfall and soil, respectively; 19.78% and 80.22% of ammonia nitrogen in forest runoff were from atmospheric precipitation and soil. For cultivated land, 5.90%, 68.76% and 25.34% of nitrate nitrogen came from atmospheric rainfall, soil, and fertilizer, respectively, while ammonia nitrogen mainly came from soil. In residential runoff, 3.32% of nitrate nitrogen was coming from atmospheric rainfall, 55.42% from domestic sewage, and 41.26% from animal feces, while ammonia nitrogen was mainly coming from domestic sewage and animal feces.

Key words: Erhai lake, stable isotope, source appointment, agricultural non-point source pollution, inorganic nitrogen

中图分类号:

X522

潘雄, 林莉, 董磊, 谢玲娴, 黄华伟, 陈进. 洱海典型小流域丰水期农业面源氮污染来源解析[J]. 长江科学院院报, 2020, 37(10): 16-20.

PAN Xiong, LIN Li, DONG Lei, XIE Ling-xian, HUANG Hua-wei, CHEN Jin. Sources of Agricultural Non-point Nitrogen Pollution in Typical Small Watershed of Erhai Lake in Abundant Water Period[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2020, 37(10): 16-20.

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洱海典型小流域丰水期农业面源氮污染来源解析

Sources of Agricultural Non-point Nitrogen Pollution in Typical Small Watershed of Erhai Lake in Abundant Water Period

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