Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)

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Isotope Techniques for Identifying Nitrate Pollution Sources in Southern Humid Regions of China: A Case Study in Conghua District

Authors
Qunhao Yang1, Jinghao Zhao2, Yulong Xiong2, *
1Southern Water Network Watershed Affairs Center of Guangzhou, Guangzhou, Guangdong, 510000, China
2Bureau of Hydrology and Water Resources, Pearl River Water Resources Commission of Ministry of Water Resources, Guangzhou, Guangdong, 510000, China
*Corresponding author. Email: 874123818@qq.com
Corresponding Author
Yulong Xiong
Available Online 24 April 2024.
DOI
10.2991/978-94-6463-398-6_62How to use a DOI?
Keywords
groundwater; nitrates; isotope techniques; source identification
Abstract

Nitrates pose a significant threat to groundwater quality, with agricultural activities being the primary source. This study employs environmental isotope techniques, using stable isotopes such as D, 18O, and 15N as tracers, to identify and investigate the sources of nitrate pollution in groundwater and water bodies in Conghua District, Guangzhou. A total of 90 groundwater samples were collected. By utilizing hydrogen and oxygen isotopes to trace the groundwater source, the results indicate that groundwater is primarily replenished by atmospheric precipitation, with vertical replenishment dominating during the rainy season and lateral replenishment prevailing during the non-rainy season. Based on nitrogen and oxygen isotopes, along with the analysis of characteristic ranges of different forms of nitrogen, in combination with nitrogen concentrations, fertilization conditions, and land use patterns, the results reveal that nitrate in Conghua District mainly originates from manure and sewage, with contributions from fertilizers and atmospheric precipitation as well. These findings contribute crucial groundwork for groundwater resource management in southern China's humid regions.

Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
Series
Atlantis Highlights in Engineering
Publication Date
24 April 2024
ISBN
10.2991/978-94-6463-398-6_62
ISSN
2589-4943
DOI
10.2991/978-94-6463-398-6_62How to use a DOI?
Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Qunhao Yang
AU  - Jinghao Zhao
AU  - Yulong Xiong
PY  - 2024
DA  - 2024/04/24
TI  - Isotope Techniques for Identifying Nitrate Pollution Sources in Southern Humid Regions of China: A Case Study in Conghua District
BT  - Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
PB  - Atlantis Press
SP  - 633
EP  - 643
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-398-6_62
DO  - 10.2991/978-94-6463-398-6_62
ID  - Yang2024
ER  -