| 摘要: |
| 为了解淮水北调工程水源及调水干流水质变化,基于2011-2019年淮水北调4个监测断面的逐月监测数据,采用单因子污染指数法、水质综合污染指数法(WQI)、主成分分析法、聚类分析及Daniel趋势分析法分析各断面水质时空变化特征。结果表明：(1)蚌埠闸中连续9年的五项监测指标均能达到地表水Ⅲ类标准,何巷闸下CODCr在2016年、2019年超地表水Ⅲ标准；CODCr、CODMn、NH3-N及TP均随时间呈下降趋势,DO随时间呈升高趋势；汛期DO下降,其余指标均升高；(2)水质WQI均值在59.40,属于“良”；WQI值以2014年为拐点先降后增；汛期水质WQI值下降；主成分分析表明CODCr、CODMn、TP是影响水质的关键污染指标(3)Daniel趋势检验表明,监测断面WQI值均呈上升趋势,表明9年来水质有变好的趋势。水质表现为由南到北逐渐变差。水质污染以入河支流沟渠输入和人类活动带来的污染为主。应进一步加强污染防治工作,确保淮水北调工程输水水质安全。 |
| 关键词: 淮水北调工程 水质评价 水质综合污染指数法 主成分分析 Daneil趋势法 |
| DOI： |
| 投稿时间：2024-03-26修订日期：2024-04-22 |
| 基金项目:引江济淮工程（安徽段）输水沿线水源保护区划分、重大突发性水污染事件预警系统和水源地保护规划等课题研究项目（YJJH-ZT-ZX-20230706545） |
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| Analysis of spatiotemporal changes in water quality in the main stream of the Huaihe Water Transfer North Project |
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TENG Jiao1, GUO Zhiyang1, CHEN Sheng2, TAN Qian1
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| (1.Anhui Water Conservancy and Hydropower Survey and Design Research Institute Co,Hefei;2.Anhui Provincial Group Limited for Yangtze-to-huaihe Water Diversion,Hefei) |
| Abstract: |
| In order to understand the water source of the Huaihe Water Transfer North Project and the water quality changes in the main stream of the water diversion, based on monthly monitoring data from 2011-2019 for each of the four monitoring cross sections of the Huaihe Water Transfer North Project. The spatial and temporal characteristics of water quality at each cross section were analyzed by using the single-factor pollution index method, water quality index (WQI), principal component analysis, cluster analysis and Daniel trend analysis. The results show:(1)The five monitoring indicators in the Bengbuzhazhong were able to meet the surface water Ⅲ standard for nine consecutive years, and CODCr under the Hexiangzhaxia exceeded the surface water Ⅲ standard in 2016 and 2019;(2)WQI values decreased during the flood season; principal component analysis showed that CODCr, CODMn, and TP were the key pollution indicators affecting water quality.(3)Daniel"s trend test showed that the WQI values at the monitoring sections were all trending upward, indicating a trend toward better water quality over the past nine years. Water pollution is dominated by inputs from tributaries and pollution from human activities, Pollution prevention and control should be further strengthened to ensure the safety of the water quality of the water transferred from the Huaihe Water Transfer North Project. |
| Key words: Huaihe Water Transfer North Project water quality assessment Water Quality Index principal component analysis Daneil"s trend method |
