Source Characteristics of Nitrate Pollution in Fenhe River During High and Low Water Periods

Yang Ruijing; Feng Minquan; Wang Yinlong

doi:10.13961/j.cnki.stbctb.2019.06.031

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Source Characteristics of Nitrate Pollution in Fenhe River During High and Low Water Periods

- Source Characteristics of Nitrate Pollution in Fenhe River During High and Low Water Periods
- Bulletin of Soiland Water Conservation Vol. 39, Issue 6, Pages: 211-217(2019)
- 作者机构：
  
  西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.06.031
  CLC：
- Published：2019
- 稿件说明：
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Yang Ruijing, Feng Minquan, Wang Yinlong. Source Characteristics of Nitrate Pollution in Fenhe River During High and Low Water Periods[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 211-217.
DOI：

Yang Ruijing, Feng Minquan, Wang Yinlong. Source Characteristics of Nitrate Pollution in Fenhe River During High and Low Water Periods[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 211-217. DOI： 10.13961/j.cnki.stbctb.2019.06.031.

摘要

[目的

]

对汾河径流丰水期和枯水期的河流硝酸盐污染来源特征进行对比分析和研究，为汾河下游氮源污染治理提供理论支持。[方法

]

通过研究2018年汾河下游水体硝酸盐及其氮、氧同位素不同时期的变化，分析排入河流的硝酸盐来源雨期性变化特征，并引入IsoSoure模型，定量计算各污染源对汾河下游水体硝酸盐的贡献。[结果

]

在丰水期和枯水期，δ

N值变化范围为3.45‰～11.19‰，δ

O值变化范围为-0.72‰～3.17‰，硝酸盐污染源主要为农业化肥、土壤有机氮、生活污水与粪便；硝酸盐污染源主要与汾河下游周围土地利用类型相关，丰水期临汾段与M

采样点硝酸盐污染源主要为粪便和污水，分别占比为58%，40%，72%和58%，M

—M

段农业化肥贡献率最高，占比分别45.4%，62%，56.6%，56.5%。枯水期所有采样点硝酸盐污染源贡献率最高的都为粪便和污水，占比为40%～73%。[结论

]

汾河径流硝酸盐污染来源主要为农业化肥、土壤有机氮、生活污水与粪便，并且污染来源与土地利用类型有很强相关性，不同水期硝酸盐污染来源大多为粪便和生活污水，差别主要体现在M

—M

取样点，丰水期主要污染物为农业化肥，而枯水期为粪便与生活污水。

Abstract

[Objective] The source characteristics of nitrate pollution in the high and low water period of Fenhe River were analyzed and studied in order to provide theoretical support for the treatment of nitrogen pollution in the lower reaches of the Fenhe River.[Methods] The changes of nitrate and its nitrogen and oxygen isotopes in different periods in the lower reaches of Fenhe River in 2018 was analyzed to investigate the characteristics of the change of nitrate sources discharged into the river in rainy periods. And the Isosoure model was introduced to calculate the contribution of each pollution source to the nitrate in the lower reaches of Fenhe River.[Results] In the high and low water period

the variation range of δ15N was 3.45‰~11.19‰

δ18O value was -0.72‰~3.17‰. The nitrate pollution sources were mainly agricultural fertilizer

soil organic nitrogen

domestic sewage and feces. The nitrate pollution sources were mainly related to the land use types around the lower reaches of Fenhe River. In the high water period

the nitrate pollution sources at Linfen section and M5 sampling point were mainly feces and sewage

accounting for 58%

40%

72% and 58%

respectively. The contribution rate of agricultural fertilizer in M6-M9 section was the highest

accounting for 45.4%

62%

56.6% and 56.5%

respectively. The highest contribution rate of nitrate pollution sources in all sampling points in low water period was feces and sewage

accounting for 40%~73%.[Conclusion] The main sources of nitrate pollution in the runoff of Fenhe River are agricultural fertilizer

soil organic nitrogen

domestic sewage and feces

and the pollution sources are closely related to land use types. Most of the sources of nitrate pollution in different water periods are feces and domestic sewage

and the difference is mainly reflected in the M6-M9 sampling point. The main pollutants in the wet period are agricultural fertilizer

while in the dry period are feces and domestic sewage.

关键词

Keywords

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