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人民珠江 ›› 2021, Vol. 42 ›› Issue (12): 17-23.doi: 10.3969/j.issn.1001-9235.2021.12.002

• 粤港澳大湾区水安全保障专题 • 上一篇    下一篇

流溪河流域地下水三氮分布特征及影响因素分析

庞园, 曾慧, 张明珠, 卓泉龙, 郭政国   

  1. 广州市水务科学研究所,广东 广州 510220
  • 收稿日期:2021-05-10 出版日期:2021-12-25 发布日期:2021-12-28
  • 作者简介:庞园,男,主要从事水资源与水环境研究等工作。E-mail:527567713@qq.com
  • 基金资助:
    广东省水利科技创新项目(2012-17)

Analysis of Distribution and Influencing Factors of Three-Nitrogen in Groundwater of the Liuxi River Basin

PANG Yuan, ZENG Hui, ZHANG Mingzhu, ZHUO Quanlong, GUO Zhengguo   

  1. Guangzhou Hydraulic Research Institute,Guangzhou 510220,China
  • Received:2021-05-10 Online:2021-12-25 Published:2021-12-28

摘要: 基于研究区28个采样点2012—2018年的监测数据,对流溪河流域地下水三氮分布特征及影响因素进行了分析。结果表明:研究区地下水中氨氮、硝酸盐氮和亚硝酸盐氮的质量浓度均随时间呈下降趋势,年下降幅度分别为0.220、0.120、0.001 mg/L;中游氨氮和硝酸盐氮的质量浓度分别是下游的1.1倍和1.6倍;基岩裂隙水中氨氮、硝酸盐氮和亚硝酸盐氮的质量浓度均值分别是松散岩类孔隙水的3.2、0.1和0.7倍;氨氮与农药化肥施用量的关联度更大,硝酸盐氮和亚硝酸盐氮与废污水排放量的关联度更大;三氮在一定程度上受降雨的影响,但相关性较差;氨氮和硝酸盐氮与地下水的氧化还原条件关系和地下水径流条件关系密切。

关键词: 地下水, 三氮, 流溪河

Abstract: Based on the monitoring data of 28 sampling points in the study area from 2012 to 2018,the distribution characteristics and influencing factors of groundwater three nitrogen in Liuxi River Basin were analyzed.The results showed that the mass concentrations of ammonia nitrogen,nitrate nitrogen and nitrite nitrogen in groundwater in the study area showed a downward trend with time,and the annual decreasing ranges were 0.220,0.120 and 0.001 mg/L,respectively;the mass concentrations of ammonia nitrogen and nitrate nitrogen in the middle reaches were 1.1 and 1.6 times higher than those in the lower reaches,respectively;the average mass concentrations of ammonia nitrogen,nitrate nitrogen and nitrite nitrogen in bedrock fissure water were 3.2,0.1 and 0.7 times of that in loose rock pore water,respectively;the correlation degree of ammonia nitrogen and pesticide and fertilizer application was greater,the correlation degree of nitrate nitrogen and nitrite nitrogen and waste water discharge was greater;and three-nitrogen was affected by rainfall to a certain extent,but the correlation was poor;ammonia nitrogen and nitrate nitrogen were closely related to the redox condition and runoff condition of groundwater.

Key words: groundwater, Three-Nitrogen, Liuxi River

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