摘要
黄河流域生态保护和高质量发展已经成为一项重大国家战略,伊洛河作为黄河重要的一级支流,对其进行水质趋势分析具有重要意义。根据伊洛河流域中巩义七里铺和伊洛汇合处两个断面2009—2017年这9年的实测水质资料,运用季节性Kendall检验法、污染物输送率检验法和偏Mann-Kendall检验法对选取的代表性水质参数COD和氨氮质量浓度进行趋势分析。结果表明:该区域内水体污染物质量浓度存在动态变化,在季节性Kendall检验下,只有伊洛汇合处的氨氮质量浓度存在下降趋势;在污染物输送率检验下,只有巩义七里铺的COD不存在趋势变化,其余的呈现下降趋势,由此说明这两处断面的水质污染属于点源污染;而在偏Mann-Kendall检验中,剔除了流量波动的影响,巩义七里铺和伊洛汇合处的COD和氨氮质量浓度都呈现下降趋势,意味着这两个断面的水质在不断好转。另外,通过水质趋势分析,探索到河段内主要污染物来源及河段水质变化成因,从而找到治理伊洛河流域的有效途径。
Ecological protection and high-quality development of the Yellow River Basin has become a major national strategy.As an important tributary of the Yellow River,it is of great significance to analyze the trend of water quality change in Yiluo River.Based on the nine-year water quality data measured at the Qilipu and Yiluo confluence sections of Gongyi in the Yiluo River Basin,the seasonal Kendall test,the pollutant transfer rate test and the partial Mann-Kendall test are applied to analyze the trend of selected representative water quality parameters COD and ammonia nitrogen concentration.The results are as follows.Firstly,there are dynamic changes in the mass concentration of water pollutants in this area.Under the seasonal Kendall test,only the ammonia nitrogen concentration at the Yiluo confluence shows a downward trend.Secondly,under the pollutant transport rate test,only the COD of Qilipu of Gongyi shows no trend change,while the others show a downward trend.This indicates that the water pollution in these two sections is a point source pollution.Thirdly,in the partial Mann-Kendall test,excluding the influence of flow fluctuations,the mass concentrations of COD and ammonia nitrogen at the confluence of Qilipu and Yiluo,Gongyi show a downward trend,which means that the water quality of these two sections is continuously improving.In addition,after the analysis of water quality trends,we can find out the main sources of pollutants in the reach and the causes of water quality changes,so as to find an effective way to manage the Yiluo River Basin.
作者
王志良
尚冉冉
陈海涛
马明卫
WANG Zhiliang;SHANG Ranran;CHEN Haitao;MA Mingwei(North China University of Water Resources and Electric Power,Zhengzhou 450046,China)
出处
《华北水利水电大学学报（自然科学版）》
北大核心
2021年第2期17-23,共7页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家自然科学基金重点项目(41701022)。
