A Comprehensive Method for Water Environment Assessment considering Trends of Water Quality

Sheng Bi,Jianzhong Zhou,Yongrong Li,Zhimian Wang,Xiaoling Ding,Zhenping Zhang,Li Wang,Kirk Hatfield

doi:10.1155/2021/5548113

Abstract

Water quality is a significant issue, and its assessment plays an important role in environmental management and pollution control. In this paper, we proposed a comprehensive water quality assessment method which takes into account both absolute and temporal trends in water quality. As the first step, we derived and applied a comprehensive pollution index (CPI) to characterize water pollution in 16 major tributaries to the Danjiangkou Reservoir, located in the upper reaches of the Hanjiang River in China. Next, we used Spearman’s rank correlation analysis to quantify temporal CPI trends in each tributary. As the final step, we conducted principal component analysis (PCA) using data on 8 water quality parameters and the temporal CPI trend from each of the 16 tributaries. The resultant comprehensive water quality assessment method identified tributaries, which stand to improve and threaten water quality in the Danjiangkou Reservoir from both immediate and future perspectives.

Highlights

Sufficient access to freshwater resources is essential to the survival of human and natural ecosystems, and its role is inextricably coupled in economic sectors [1]. e actual state of water resources is a sensitive and critical issue in many countries, and the deterioration of water quality has become a global problem
We proposed a water quality assessment method which takes into account water quality trends
Evaluation of Water Quality with Trends Considered. ere are 9 original variables which were used in principal component analysis (PCA)

Summary

Introduction

Sufficient access to freshwater resources is essential to the survival of human and natural ecosystems, and its role is inextricably coupled in economic sectors [1]. e actual state of water resources is a sensitive and critical issue in many countries, and the deterioration of water quality has become a global problem. Sufficient access to freshwater resources is essential to the survival of human and natural ecosystems, and its role is inextricably coupled in economic sectors [1]. E actual state of water resources is a sensitive and critical issue in many countries, and the deterioration of water quality has become a global problem. An appraisal of available water resources and their quality is the first step to ensuring water security; research on water quality evaluation has been an area of increasing interest and necessity [2]

Methods

Results

Conclusion