Research on comprehensive evaluation of drinking water source based on two principal component analysis for water body classification and time-space comparability

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Zong, Yongchen^1^2^3^4^5^6 ; Huang, Decai^6 ; Zhang, Yongheng^6 ; Lu, Guanghua^1^2^3^4^5^6

Res. Institute of Tibet Plateau Ecology, Tibet Agriculture and Animal Husbandry University, Linzhi

860000, China^1

Tibet Key Laboratory of Forest Ecology in Plateau Area, Ministry of Education, Linzhi

860000, China^2

National Key Station of Field Scientific Observation and Experiment, Linzhi

860000, China^3

Key Laboratory of Forest Ecology in Plateau Area, Tibet Autonomous Region, Linzhi

860000, China^4

United Key Laboratories of Ecological Security, Tibet Autonomous Region, Linzhi

860000, China^5

Water Conservancy Project and Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi

860000, China^6

关键词: Comprehensive evaluation;    Drinking water sources;    Environmental quality standards;    Eutrophication evaluations;    First principal components;    Principal component analysis method;    Single factor evaluation;    Temporal and spatial variation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/6/062025/pdf
DOI  :  10.1088/1755-1315/227/6/062025

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Based on the monitoring data of 15 indicators of 7 typical drinking water sources in Niyang River, the principal component analysis was carried out by the standard values of the corresponding surface water environmental quality standards, and first principal component analysis and second principal component analysis were constructed successively with the standardized mean value, standard deviation and the cumulative variance, eigenvector and component matrix of the principal component analysis. The models of two principal component analysis for the comprehensive evaluation of drinking water sources were constructed on the basis of a principal component analysis and two principal component analysis. The results showed that the water quality is good in the drinking water sources in Niyang River, and all the drinking water sources belong to the class II water bodies through the status evaluation, eutrophication evaluation, health risk evaluation and comprehensive evaluation. The comprehensive evaluation results based on the two principal component analysis method were completely consistent with those obtained by the single factor evaluation method, indicating that the two principal component analysis method is feasible for comprehensive evaluation of water quality. In addition, the consistency of the principal component analysis matrices ensured the comparability of the temporal and spatial variation in water quality.