Historical Trends and Driving Forces of River Water Quality Improvement in the Megacity Shenzhen, China

Sun，Xiang1,2,3; Wu，Qingping2; Jiang，Jiping2; Lin，Kairong4

2023-06-01

10.3390/w15122283

Water (Switzerland)   Impact Factor & Quartile

2073-4441

The water quality of urban rivers in China has undergone significant improvement since the 13th Five-Year Plan period (2016–2020). Among these, urban rivers in Shenzhen are the most representative. Assessing historical trends and analyzing the driving forces of river water quality improvement is of great importance and provides valuable insights. This study selects two typical watersheds, Maozhou River and Longgang River, to explore how water quality trends link with water control projects in Shenzhen from 2003 to 2020. The historical trends were evaluated using a recently developed index called WQI-DET, which considers DO, COD, NH-N, TP, and anionic surfactants. Results showed that both rivers were seriously polluted before 2010 and gradually improved during the 12th Five-Year Plan period. After 2010, the water quality improved rapidly thanks to the environmental remediation of the mainstream, especially the interception project of Longgang River around 2010, and the Maozhou River interception project in 2015. The rainwater and sewage diversion renovation project mainly contributed to meeting the standards for Class IV water bodies during the 13th Five-Year Plan period. This study reveals the semi-quantitative link between comprehensive water quality improvement and pollution control engineering measures. It is a helpful review for Shenzhen and provides a useful reference for other cities.

megacities Shenzhen spatial and temporal evolution trend test WQI

SCI

English

Corresponding

National Natural Science Foundation of China[51979136];

Environmental Sciences & Ecology ; Water Resources

Environmental Sciences ; Water Resources

WOS:001015681000001

MDPI

2-s2.0-85163835885

Scopus

1.School of Environment,Harbin Institute of Technology,Harbin,150090,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Shenzhen Ruiyang Water Technology Co.,Ltd.,Shenzhen,518000,China
4.School of Civil Engineering,Sun Yat-sen University,Guangzhou,510275,China

Sun，Xiang,Wu，Qingping,Jiang，Jiping,et al. Historical Trends and Driving Forces of River Water Quality Improvement in the Megacity Shenzhen, China[J]. Water (Switzerland),2023,15(12).

Sun，Xiang,Wu，Qingping,Jiang，Jiping,&Lin，Kairong.(2023).Historical Trends and Driving Forces of River Water Quality Improvement in the Megacity Shenzhen, China.Water (Switzerland),15(12).

Sun，Xiang,et al."Historical Trends and Driving Forces of River Water Quality Improvement in the Megacity Shenzhen, China".Water (Switzerland) 15.12(2023).