西江流域水质现状及2005—2014年水质变化趋势分析

根据西江流域水功能区2005—2015年11 a水质资料，评价西江流域水功能区水质现状，分析2005—2014年水质达标率，应用“季节性肯达尔检验法”对水功能区典型超标污染物的变化趋势进行分析。结果表明，西江流域水质现状总体良好，西江干流及贺江水质有好转趋势，新兴江、罗定江、绥江耗氧类有机物及氧平衡指标浓度呈上升趋势。

Water Quality Actuality of the Xijiang River Basin and Change Tendency in 2005-2014

According to the data of the water quality in the water function areas of the Xijiang River basin during 2005 to 2015, the water quality was evaluated, and the standard rate of the water function areas was studied. The change trend of the typical excessive pollutants over the last 10 years in the water function areas was analyzed by season’s Kendall test method. The water quality actuality of the Xijiang River basin is good to a great extent. The water quality of the mainstream of the Xijiang River and the He River took a turn for the better. The consistence of oxygen consumption and oxygen balance index in the Xinxing River, Luoding River and Sui River, was on an upward trend.