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| DOI：10.13522/j.cnki.ggps.20190146 |
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| Changing Characteristics of The Water Quality along the Niyang River Based on Multivariate Analysis Method |
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HAO Shouning, DONG Fei
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1. Tibet Agriculture and Animal husbandry University, Nyingchi 860000, China; 2.China Institute of Water Resources and Hydropower Research, Beijing 100038, China
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| Abstract: |
| 【Objective】The purpose of this paper is to analyze the water quality status and find the main pollution indicators of the water body during the wet season along the Niyang River. The characteristics of water pollution in drinking water in the Niyang river basin and its potential hazards on human health were investigated.【Method】Based on the water quality monitoring data during the 2018 flood season，multiple statistical methods were used to analyze water quality from 10 sampling sites in main stream of Niyang river，Hierachical cluster analysis indicated that the monitoring sections can be classified into three groups according to their water quality. 【Result】 In the first group，the water were mainly polluted by organic pollutants，the nitrogen and phosphorus nutrient concentrations were relatively high in these rivers，but the degree of water pollution was light，the pollution sources were also relatively simple; In the second group，the water were mainly polluted by organic and mental pollutants，the water quality were worse than the first group and the pollution sources were relatively complex; In the third group，The water body with the most serious pollution and the most pollution index in three groups. 【Conclusion】The results of principle component analysis are basically consistent with the single factor water quality evaluation results, the water quality of Niyang river has improved with the river direction. |
| Key words: cluster analysis; principal component analysis; water quality; Niyang River |
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