水生态学杂志Issue(4)：50-56,7.DOI:10.15928/j.1674-3075.2015.04.007
长江荆州段水质变化趋势分析
Water Quality Trends in the Jingzhou Section of the Yangtze River
摘要
Abstract
The Jingzhou section of the Yangtze River flows 483 km through 8 counties and cities,from Songzi City to Honghu City.It is an important domestic water source for urban and rural residents and for industrial and agricul-tural production,but it also receives industrial and domestic wastewater.In this study,water quality trends were analyzed in the Jingzhou section from 2010 to 2014 using the seasonal Kendall Test.Based on pollutant discharges to the Jingzhou section,two water quality parameters,ammonia nitrogen (NH +4 -N)and total phosphorus (TP) were measured at 6 monitoring stations:Chengnan,Liulinzhou,Xiazigou,Beimenkou,Sanjitou and Changjiangx-indi.Spatial variation in water quality was also analyzed.Both NH +4 -N and TP concentrations at Chengnan de-creased significantly over the 5 years and increased significantly at Changjiangxindi.Concentration of NH +4 -N also increased significantly at Liulinzhou but changes in NH +4 -N and TP concentrations at the other sites were not signifi-cant.Sites with significant concentration decreases,significant concentration increases and no significant change accounted for,respectively,2.8%,38.2% and 59.0% of the total river length.Overall,water quality of the Jingzhou section of the Yangtze River has not changed markedly over the past 5 years.Spatially,NH +4 -N and TP concentrations decreased from Chengnan to Liulinzhou,increased from Liulinzhou to Xiazigou,decreased again from Xiazigou to Beimenkou and then increased from Beimenkou to Sanjitou and Xindi.High concentrations were measured at the Xiazigou sampling station near Jingzhou,due primarily to low flow from upstream,discharges of in-dustrial wastewater and domestic sewage and agricultural non-point source pollution.Suggestions for improving wa-ter quality in the Jingzhou section include:strictly control point source discharges of industrial and domestic wastewater;actively promote soil and water conservation along the Yangtze river and its tributaries;reduce non-point source pollution and monitor water quality more intensively at the outlet of Xiazigou,where high nitrogen and phosphorus pollution were recorded.关键词
长江荆州段/季节性 Kendall 检验法/水质变化/趋势分析Key words
Jingzhou section of the Yangtze River/seasonal Kendall Test/water quality trend analysis/spatial variation of water quality分类
资源环境引用本文复制引用
姚家芬,姚青梅,王俊..长江荆州段水质变化趋势分析[J].水生态学杂志,2015,(4):50-56,7.基金项目
国家自然科学青年科学基金项目（51509169）。 （）
