Spatiotemporal variation evaluation of water quality in middle and lower Han River, China

Deng, Lele1,2; Chen, Kebing3; Liu, Zhangjun1; Wu, Boyang4; Chen, Zekun5; He, Shaokun5

2022-08-19

10.1038/s41598-022-16808-w

Scientific Reports   Impact Factor & Quartile

2045-2322

As the water source for the middle route of the South-to-North Water Transfer Project, the Han River in China plays a role of the world's largest inter-basin water transfer project. However, this human-interfered area has suffered from over-standard pollution emission and water blooms in recent years, which necessitates urgent awareness at both national and provincial scales. To perform a comprehensive analysis of the water quality condition of this study area, we apply both the water quality index (WQI) and minimal WQI (WQI(min)) methods to investigate the spatiotemporal variation characteristics of water quality. The results show that 8 parameters consisting of permanganate index (PI), chemical oxygen demand (COD), total phosphorus (TP), fluoride (F-), arsenic (As), plumbum (Pb), copper (Cu), and zinc (Zn) have significant discrepancy in spatial scales, and the study basin also has a seasonal variation pattern with the lowest WQI values in summer and autumn. Moreover, compared to the traditional WQI, the WQI(min) model, with the assistance of stepwise linear regression analysis, could exhibit more accurate explanation with the coefficient of determination (R-2) and percentage error (PE) values being 0.895 and 5.515%, respectively. The proposed framework is of great importance to improve the spatiotemporal recognition of water quality patterns and further helps develop efficient water management strategies at a reduced cost.

SCI

English

Corresponding

National Natural Science Foundation of China[51909112] ; China Postdoctoral Science Foundation[2022M711493]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000842561700037

NATURE PORTFOLIO

Web of Science

1.Jiangxi Acad Water Sci & Engn, Nanchang, Jiangxi, Peoples R China
2.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn, Wuhan, Peoples R China
3.Changjiang Water Resources Commiss, Bur Hydrol, Wuhan, Peoples R China
4.Tech Univ Munich, TUM Dept Civil Geo & Environm Engn, Munich, Germany
5.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China

Deng, Lele,Chen, Kebing,Liu, Zhangjun,et al. Spatiotemporal variation evaluation of water quality in middle and lower Han River, China[J]. Scientific Reports,2022,12(1).

Deng, Lele,Chen, Kebing,Liu, Zhangjun,Wu, Boyang,Chen, Zekun,&He, Shaokun.(2022).Spatiotemporal variation evaluation of water quality in middle and lower Han River, China.Scientific Reports,12(1).

Deng, Lele,et al."Spatiotemporal variation evaluation of water quality in middle and lower Han River, China".Scientific Reports 12.1(2022).