Spatial-temporal Distribution and Influencing Factors of Dissolved Oxygen in the North Mainstream of Dongjiang River

WANG Ju; WU Qiong; LUO Huan; SUN Ling-ling; LI Ning; HE Ying-qing

doi:10.11988/ckyyb.20221362

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Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (3) : 37-44. DOI: 10.11988/ckyyb.20221362

Water Environment And Water Ecology

Spatial-temporal Distribution and Influencing Factors of Dissolved Oxygen in the North Mainstream of Dongjiang River

WANG Ju¹, WU Qiong², LUO Huan^2,3,4, SUN Ling-ling², LI Ning², HE Ying-qing²

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Abstract

The North mainstream of Dongjiang River is located at Guangzhou’s eastern drinking water source protection zone, with a target water quality of Class II. The Dadun section, as the last assessed section designated by the government in the North mainstream, holds significant importance in evaluating the overall water quality. However, the dissolved oxygen (DO) level in this section have failed to meet required standards over the past five years. We collected water quality data from the mainstream of Dongjiang River and the Dadun section during 2018-2022 and analyzed the temporal and spatial variations of DO concentration. Using Pearson correlation analysis and multiple linear regression analysis, we investigated the causes of low oxygen levels in the Dadun section based on recent hydrometeorological data and water quality remote sensing images. Our results revealed that the DO concentration in the lower reach of the north mainstream was significantly lower than that in the upper and middle reaches. Additionally, the DO concentration was higher during dry seasons compared to wet seasons. The DO concentration in Dadun section were influenced by numerous factors. It positively correlates with pH value, conductivity, and tidal current velocity, while negatively correlating with water temperature, total phosphorus (TP), turbidity, and rainfall. Furthermore, the upstream incoming water quality plays a crucial role in affecting the DO concentration of the north mainstream. Among these factors, water temperature emerges as the primary influencing factor, contributing 62.1% to the overall DO concentration variation. The research findings provide essential support for ensuring the stability of the Dadun section during national assessments, and moreover, contribute to strengthening the region’s capacity for water pollution prevention and control, ultimately enhancing the effectiveness of water pollution management efforts.

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dissolved oxygen / spatial-temporal distribution / influencing factors / correlation analysis / the north mainstream of Dongjiang River

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WANG Ju, WU Qiong, LUO Huan, SUN Ling-ling, LI Ning, HE Ying-qing. Spatial-temporal Distribution and Influencing Factors of Dissolved Oxygen in the North Mainstream of Dongjiang River[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(3): 37-44 https://doi.org/10.11988/ckyyb.20221362

References

[1] 殷燕,吴志旭,刘明亮,等.千岛湖溶解氧的动态分布特征及其影响因素分析[J].环境科学,2014,35(7):2539-2546.(YIN Yan,WU Zhi-xu,LIU Ming-liang,et al. Dynamic Distributions of Dissolved Oxygen in Lake Qiandaohu and Its Environmental Influence Factors[J]. Environmental Science,2014,35(7):2539-2546.(in Chinese))
[2] 王话翔. 上海城市地表水溶解氧时空分布特征及影响因素探讨[D]. 上海: 华东师范大学, 2020.(WANG Hua-xiang. Spatial and Temporal Distribution Characteristics of Dissolved Oxygen in Surface Water and Its Influencing Factors in Shanghai[D]. Shanghai: East China Normal University, 2020.(in Chinese))
[3] 张杨. 白洋淀典型村落水域沉积物污染特征及生物毒性研究[D]. 沈阳: 辽宁大学, 2021.(ZHANG Yang. Distribution Characteristics of Nutrient Elements and Heavy Metals and Its Risk Assessment in Sediments of Villages in Baiyangdian Lake[D]. Shenyang: Liaoning University, 2021.(in Chinese))
[4] 黄炜惠. 中国水环境溶解氧基准与标准初步研究[D]. 北京: 中国环境科学研究院, 2021.(HUANG Wei-hui. Preliminary Study on the Criteria and Standard of Dissolved Oxygen in Water Environments of China[D]. Beijing: Chinese Research Academy of Environmental Sciences, 2021.(in Chinese))
[5] 王春,刘军,谢鑫苗,等.南京市地表水溶解氧分布特征及低氧成因初探:以外秦淮河七桥瓮为例[J].环境监控与预警,2022,14(3):63-69.(WANG Chun,LIU Jun,XIE Xin-miao,et al.Research on the Distribution of Dissolved Oxygen and Causes of Low Oxygen in the Surface Water of Nanjing: A Case Study of Qiqiaoweng in Waiqinhuai River[J]. Environmental Monitoring and Forewarning,2022,14(3):63-69.(in Chinese))
[6] 陈永灿, 付健, 刘昭伟, 等. 三峡大坝下游溶解氧变化特性及影响因素分析[J]. 水科学进展, 2009, 20(4): 526-530.(CHEN Yong-can, FU Jian, LIU Zhao-wei, et al. Analysis of the Variety and Impact Factors of Dissolved Oxygen Downstream of Three Gorges Dam after the Impoundment[J]. Advances in Water Science, 2009, 20(4): 526-530.(in Chinese))
[7] 高锐,黄岁樑,孙逸璇.潘家口水库热分层期溶解氧垂向分布及影响因素[J].水资源与水工程学报,2022,33(3):39-49,57.(GAO Rui,HUANG Sui-liang,SUN Yi-xuan.Vertical Distribution and Influencing Factors of Dissolved Oxygen during Thermal Stratification in Panjiakou Reservoir[J]. Journal of Water Resources and Water Engineering,2022,33(3):39-49,57.(in Chinese))
[8] 孙毅, 吕方辉, 陈钊, 等. 长江口邻近海域溶解氧的时空分布及影响因素研究[J]. 海洋科学, 2021, 45(12): 86-96.(SUN Yi, LÜ Fang-hui, CHEN Zhao, et al. Spatial-Temporal Distribution and Dynamics of Dissolved Oxygen in an Adjacent Area of the Changjiang Estuary[J]. Marine Sciences, 2021, 45(12): 86-96.(in Chinese))
[9] 李照, 宋书群, 李才文. 长江口及其邻近海域叶绿素a分布特征及其与低氧区形成的关系[J]. 海洋科学,2016,40(2):1-10.(LI Zhao, SONG Shu-qun, LI Cai-wen. Distribution of Chlorophyll a and Its Correlation with the Formation of Hypoxia in the Changjiang River Estuary and Its Adjacent Waters[J]. Marine Sciences, 2016, 40(2): 1-10.(in Chinese))
[10] 魏鹏, 黄良民, 冯佳和, 等. 珠江口广州海域COD与DO的分布特征及影响因素[J]. 生态环境学报, 2009, 18(5): 1631-1637.(WEI Peng, HUANG Liang-min, FENG Jia-he, et al. Distribution Characteristics of COD and DO and Its Influencing Factors in the Guangzhou Sea Zone of the Pearl River Estuary[J]. Ecology and Environmental Sciences, 2009, 18(5): 1631-1637.(in Chinese))
[11] 王夏童.东江流域氮污染的时空格局变化及其来源解析[D].西安:西安工程大学,2021.(WANG Xia-tong.Spatial and Temporal Variations and Source Identification of Nitrogen Pollution in the Dongjiang River Basin[D].Xi’an:Xi’an Polytechnic University,2021.(in Chinese))
[12] 中山大学. 同时反演内陆水体混浊度、COD和叶绿素浓度的方法:中国,CN201510513928.4[P].2018-01-16.(Sun Yat-Sen University. Method for Simultaneously Inverting Turbidity, COD and Chlorophyll Concentration of Inland Water Body :CN201510513928.4[P].2018-01-16.(in Chinese))
[13] 徐闯,刘广州,陈晓宏.珠江流域东江(东莞段)溶解氧时空变化及其影响因素[J].湖泊科学,2022,34(5):1540-1549.(XU Chuang,LIU Guang-zhou,CHEN Xiao-hong.Spatiotemporal Variations and Influencing Factors of River Dissolved Oxygen in Dongguan Section of Dongjiang River, Pearl River Basin[J]. Journal of Lake Sciences,2022,34(5):1540-1549.(in Chinese))
[14] ZHANG H, CHENG W, CHEN Y, et al. Controls on the Interannual Variability of Hypoxia in a Subtropical Embayment and Its Adjacent Waters in the Guangdong Coastal Upwelling System, Northern South China Sea[J]. Ocean Dynamics, 2018, 68(8): 923-938.
[15] 宋国栋,石晓勇,祝陈坚.春季黄海溶解氧的平面分布特征及主要影响因素初探[J].海洋环境科学,2007,26(6):534-536.(SONG Guo-dong,SHI Xiao-yong,ZHU Chen-jian. Horizontal Distributions and Main Effect Factors of Dissolved Oxygen in the Yellow Sea in Spring[J]. Marine Environmental Science,2007,26(6):534-536.(in Chinese))
[16] 潘向忠, 高玉蓉, 李佳, 等. 钱塘江杭州段水体中溶解氧现状及其影响因素[J]. 环境保护科学, 2011, 37(4): 13-16, 58.(PAN Xiang-zhong, GAO Yu-rong, LI Jia, et al. Dissolved Oxygen in Water and Influencing Factors of Qiantang River in Hangzhou Section[J]. Environmental Protection Science, 2011, 37(4): 13-16, 58.(in Chinese))
[17] 徐鹏, 林永红, 杨顺顺, 等. 珠江流域氮、磷营养盐入河量估算及预测[J]. 湖泊科学, 2017, 29(6): 1359-1371.(XU Peng, LIN Yong-hong, YANG Shun-shun, et al. Input Load to River and Future Projection for Nitrogen and Phosphorous Nutrient Controlling of Pearl River Basin[J]. Journal of Lake Sciences, 2017, 29(6): 1359-1371.(in Chinese))
[18] HU J, ZHANG Z, WANG B, et al. Long-term Spatiotemporal Variations in and Expansion of Low-oxygen Conditions in the Pearl River Estuary: A Study Synthesizing Observations during 1976-2017[J]. Biogeosciences, 2021, 18(18): 5247-5264.
[19] 张莹莹, 张经, 吴莹, 等. 长江口溶解氧的分布特征及影响因素研究[J]. 环境科学, 2007, 28(8): 1649-1654.(ZHANG Ying-ying, ZHANG Jing, WU Ying, et al. Characteristics of Dissolved Oxygen and Its Affecting Factors in the Yangtze Estuary[J]. Environmental Science, 2007, 28(8): 1649-1654.(in Chinese))
[20] 张智瀛. 浅析雷州半岛海域夏季溶解氧的分布特点[J].中国新技术新产品,2014(13):157-158.(ZHANG Zhi-ying.Analysis on the Distribution Characteristics of Dissolved Oxygen in Leizhou Peninsula in Summer[J]. China New Technologies and Products,2014(13):157-158.(in Chinese))
[21] 夏星辉, 吴琼, 牟新利. 全球气候变化对地表水环境质量影响研究进展[J]. 水科学进展, 2012, 23(1): 124-133.(XIA Xing-hui, WU Qiong, MOU Xin-li. Advances in Impacts of Climate Change on Surface Water Quality[J]. Advances in Water Science, 2012, 23(1): 124-133.(in Chinese))
[22] HUANG J,HU J T, LI S Y, et al. Effects of Physical Forcing on Summertime Hypoxia and Oxygen Dynamics in the Pearl River Estuary[J]. Water, 2019, 11(10): 2080.