摘要
自20世纪90年代以来,渭河干流陕西段水质发生了明显的变化,为了定量研究河流水质趋势变化状况,本文分别采用Mann-Kendall趋势检验和均一性检验对渭河干流陕西段13个水质监测断面的水污染程度进行了分析。结果表明:DO水质趋势呈下降趋势,而CODMn和BOD5呈上升趋势,NH3-N无趋势变化;渭河干流陕西段的CODMn和BOD5趋势呈不均一变化,而DO和NH3-N检验呈均一性的变化。
The water quality in Shaanxi section of Weihe River has changed significantly since 90＇s 20th.In order to quantitatively analyze water quality trend,data from 13 monitoring sections in Weihe River was analyzed by the Mann-Kendall method and the homogeneity test.The result shows that： 1）the dissolved oxygen（DO）trend is decline,the trend of chemical oxygen demand（CODMn）and biochemical oxygen demand（BOD5）is rise,and the concentration of ananonia-N（NH3-N）is not changed.2）the homogeneity test indicated the CODMn and BOD5 had not homogeneity trend,DO and NH3-N have a homogeneity trend.
出处
《水资源与水工程学报》
2010年第1期141-144,共4页
Journal of Water Resources and Water Engineering
