Water Quality Evaluation and Cause Analysis of Dongjiang River Basin in Jiangxi-Guangdong Outbound During 2007-2019

Zeng Jinfeng; Liu Zuwen; Liu Youcun; Liu Qifu; Xu Yanying; Xu Xiaojuan

doi:10.13961/j.cnki.stbctb.2020.04.019

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Water Quality Evaluation and Cause Analysis of Dongjiang River Basin in Jiangxi-Guangdong Outbound During 2007-2019

- Water Quality Evaluation and Cause Analysis of Dongjiang River Basin in Jiangxi-Guangdong Outbound During 2007-2019
- Bulletin of Soiland Water Conservation Vol. 40, Issue 4, Pages: 140-147(2020)
- 作者机构：
  
  1. 江西理工大学建筑与测绘工程学院,江西,赣州,341000
  2. 江西省赣州市水文局,江西,赣州,341000
  3. 江西理工大学资源与环境工程学院,江西,赣州,341000
  4. 江西省矿冶环境污染控制重点实验室,江西,赣州,341000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2020.04.019
  CLC： X824
- Published：2020
- 稿件说明：
移动端阅览
Zeng Jinfeng, Liu Zuwen, Liu Youcun, et al. Water Quality Evaluation and Cause Analysis of Dongjiang River Basin in Jiangxi-Guangdong Outbound During 2007-2019[J]. Bulletin of Soiland Water Conservation, 2020, 40(4): 140-147.
DOI：

Zeng Jinfeng, Liu Zuwen, Liu Youcun, et al. Water Quality Evaluation and Cause Analysis of Dongjiang River Basin in Jiangxi-Guangdong Outbound During 2007-2019[J]. Bulletin of Soiland Water Conservation, 2020, 40(4): 140-147. DOI： 10.13961/j.cnki.stbctb.2020.04.019.

摘要

[目的] 分析东江源区赣粤出境水质时空分布特征，为该流域的水环境治理和水生态改善提供理论依据和数据支撑。[方法] 基于东江源区2007—2019年赣粤出境监测断面的11项水质指标，运用描述性统计分析、水污染指数法、相关性分析和Mann-Kendall检验等方法，分析了流域出境水质变化与成因。[结果] ①不同水文时期的水质状况均存在差异，以氯化物、硫酸盐和氨氮的时空差异性最为明显。②年内变化为汛期水质好于非汛期，劣Ⅴ水仅存在于非汛期；年际变化为，2008年出境水质最差，2009年开始好转，2017—2019年全部满足Ⅱ—Ⅲ类水。③氨氮是出境水质最主要的污染物但浓度显著下降，稀土开采，果业开发和大型养殖等是影响水质的主要因素。[结论] 过去十几年，东江源区赣粤出境水不同水文时期水质略有不同但总体呈下降趋势，主要污染物氨氮浓度显著下降，源区近年采取的保护修复措施成效显著。

Abstract

[Objective] The temporal and spatial distributions of outbound water quality of the Jiangxi-Guangdong boundary in the source region of Dongjiang River were analyzed in order to provide a theoretical basis and data support for the water environment management and water ecology improvement in this watershed. [Method] Based on the 11 water quality indicators of the monitoring section during 2007—2019

the methods of descriptive statistical analysis

water pollution index method

correlation analysis and Mann-Kendall test and other methods were used to to analyze the changes and causes of outbound water quality. [Results] ① Water quality was different in different hydrological periods

especially in the spatial and temporal variation of chloride

sulfate and ammonia nitrogen. ② The water quality in the flood season was better than that in the non-flood season

and the inferior V water only existed in the non-flood season. During the inter-annual period

the outbound water quality was the worst in 2008

and it started to be improved in 2009

and during 2017—2019

they tall met the requirements of class Ⅱ—Ⅲ. ③Ammonia nitrogen was the most important pollutant of outbound water quality

but its concentration had decreased dramatically. Additionally

rare earth mining

fruit industry development and large-scale breeding were the main factors affecting water quality. [Conclusion] During 2007—2019

the water quality of the outbound water in the source area of the Dongjiang River was slightly different in different hydrological periods

but the overall trend was downward. The concentration of the main pollutant ammonia nitrogen dropped significantly. The protection and restoration measures adopted in the source area in recent years have achieved remarkable effects.

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