Research on Water Quality Assessment Using the Water Quality Index for the Eastern Route of the South-to-North Water Diversion Project
Open Access
Abstract
The South-to-North Water Diversion Project’s Eastern Route (SNWDPC-ER) has drawn a lot of attention as one of China’s most significant water diversion projects. This study calculated the water quality index (WQI) to analyze the spatial and temporal characteristics of water quality in the study area as well as the effects of water diversion, and developed the minimum water quality index (WQImin) model based on stepwise multiple linear regression, using data from 56 monitoring stations along the delivery canal of the SNWDPC-ER (the SNWDPC-delivery ER’s canal) from 2014 to 2018. Here are the findings: (1) The water quality state was rated as “good” and the annual average value of WQI climbed year over year along with improvements in water quality. (2) There was a clear difference in water quality across time and space, with autumn having better water quality than other seasons and the south having better water quality than the north. (3) Water quality is impacted by water diversion; throughout the era of diversion, water quality was steadier. (4) The weighted WQImin model, which is a quick and inexpensive way to assess water quality, can be used to evaluate the water quality in the SNWDPC-delivery ER’s canal. The model’s parameters are DO, NH3-N, BOD5, and TN.Keywords
Funding Information
- National Key Research and Development Program of China (2021YFC3200903, 2022YFC3204002, WE0145B032021, YJJH-ZT-ZX-20210315378)
- Basic Scientific Research Expense Project of IWHR (2021YFC3200903, 2022YFC3204002, WE0145B032021, YJJH-ZT-ZX-20210315378)
- Combined Water Quantity and Quality Regulation (2021YFC3200903, 2022YFC3204002, WE0145B032021, YJJH-ZT-ZX-20210315378)
- ater Quality Risk Control of the Yangtze-Huaihe Water Diversion (2021YFC3200903, 2022YFC3204002, WE0145B032021, YJJH-ZT-ZX-20210315378)
This publication has 26 references indexed in Scilit:
- Assessing river water quality using water quality index in Lake Taihu Basin, ChinaScience of The Total Environment, 2018
- Assessing water quality of five typical reservoirs in lower reaches of Yellow River, China: Using a water quality index methodEcological Indicators, 2016
- Development of river water quality indices—a reviewEnvironmental Monitoring and Assessment, 2015
- Quantity versus Quality in China’s South-to-North Water Diversion Project: A System Dynamics AnalysisWater, 2015
- Spatial characteristics of surface water quality in the Haicheng River (Liao River basin) in Northeast ChinaEnvironmental Earth Sciences, 2013
- The Research of Water Environment Cumulative Impacts of Delivery Canal on East Route of South-to-North Water Transfer ProjectProcedia Engineering, 2012
- Influence of the South–North Water Diversion Project and the mitigation projects on the water quality of Han RiverScience of The Total Environment, 2008
- Application of Water Quality Indices and Dissolved Oxygen as Indicators for River Water Classification and Urban Impact AssessmentEnvironmental Monitoring and Assessment, 2007
- Evaluation of Water Quality in the Chillán River (Central Chile) Using Physicochemical Parameters and a Modified Water Quality IndexEnvironmental Monitoring and Assessment, 2005
- Reply to comment on “Use of water quality indices to verify the impact of Cordoba city (Argentina) on Suquia River”Water Research, 2002