Multivariate analysis of surface water quality in the Three Gorges area of China and implications for water management

作     者：Jian Zhao Guo Fu Kun Lei Yanwu Li 

作者机构：Chinese Research Academy of Environmental Sciences Beijing 100012 China. 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2011年第23卷第9期

页      面：1460-1471页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 0713[理学-生态学] 

基　　金：supported by the National Water Special Project (No.2009ZX07526-005) the Strategic Environmental Assessment Project (No.HP1080901) 

主　　题：water quality spatial variations seasonal variations multivariate statistical techniques the Three Gorges 

摘      要：Multivariate statistical techniques,cluster analysis,non-parametric tests,and factor analysis were applied to analyze a water quality dataset including 13 parameters at 37 sites of the Three Gorges area,China,from 2003–2008 to investigate spatio-temporal variations and identify potential pollution *** cluster analysis,the twelve months of the year were classified into three periods of lowflow （LF）,normal-flow （NF）,and high-flow （HF）;and the 37 monitoring sites were divided into low pollution （LP）,moderate pollution （MP）,and high pollution （HP）.Dissolved oxygen （DO）,potassium permanganate index （COD Mn ）,and ammonia-nitrogen （NH 4 ＋-N） were identified as significant variables affecting temporal and spatial variations by non-parametric *** analysis identified that the major pollutants in the HP region were organic matters and nutrients during NF,heavy metals during LF,and petroleum during *** the MP region,the identified pollutants primarily included organic matter and heavy metals year-around,while in the LP region,organic pollution was significant during both NF and HF,and nutrient and heavy metal levels were high during both LF and *** main sources of pollution came from domestic wastewater and agricultural activities and runoff;however,they contributed differently to each region in regards to pollution *** the HP region,inputs from wastewater treatment plants were significant;but for MP and LP regions,water pollution was more likely from the combined effects of agriculture,domestic wastewater,and chemical *** results provide fundamental information for developing better water pollution control strategies for the Three Gorges area.