基于季节性Kendall法的岷江干流水质变化趋势分析  

Analysis of Water Quality Tendency of the Mainstream of Minjiang River with Seasonal Kendall Method

作　　者：孟春晓 王小波 黄芸 许瑞 彭道平[2] 

机构地区：[1]四川省环境监测总站,成都610091 [2]西南交通大学地球科学与环境工程学院,成都611756

出　　处：《四川环境》2015年第6期87-93,共7页Sichuan Environment

摘　　要：为进一步了解岷江水质污染趋势,应用季节性Kendall检验法对岷江干流5个监测断面2009~2014年的典型水质指标（COD_（Cr）、BOD_5、TP、NH_3-N）监测数据进行趋势分析。结果表明岷江中下游的NH_3-N和TP浓度总体呈上升趋势,如在凉姜沟断面NH_3-N平均每年上升0.0074mg/L,TP平均每年上升0.0132mg/L;而COD_（Cr）的变化趋势波动较大,BOD_5的变化不明显;流量调节检验结果和非流量检验结果基本一致。通过浓度-流量相关分析,发现在岷江上游水质指标浓度与流量的相关性较高,且随流量的增加而增大,表明污染主要来自于面源;在中游的污染主要来自点源;而在下游马鞍山和凉姜沟断面,发现水质污染来自于点源和面源的综合作用。For further understanding of the water quality tendency of Minjiang River, seasonal Kendall method was applied to analyze the main water quality indexes （CODcr, BOD5 , TP and NH3-N） of 5 monitoring sections in Minjiang River from 2009 to 20!.4. The results sho,sed that concentrations of NH3-N and TP appeared an upward trend in the middle and lower reaches, where NH3-N had an average annual increase of 0. 0074mg/L and TP of 0. 0132mg/L in Liangjianggou. However, the concentration of CODcr showed a significant fluctuation and the concentration of BOD5 showed less variations. Flow control test results were basically identical with non - flow test results. By correlation analysis of concentration and flux, it was found that a higher positive correlation between concentration and flux showed in the upper reaches, which indicated the contaminants were mainly from diffused pollution. Pollutions in the middle reaches were mainly from point sources. In the lower reaches, the water pollution was synthetically caused by diffused pollution and point source pollution.

关 键 词：岷江 季节性Kendall法 水质趋势 相关性分析 

分 类 号：X522[环境科学与工程—环境工程]