摘要
为掌握南四湖出口断面水质演变趋势及水文要素的影响,收集了2004—2023年南四湖水环境数据,利用污染指数法、主成分分析法对湖区二级坝和韩庄闸两处泄流断面进行分析。结果表明:二级坝和韩庄闸两处泄流断面污染指数呈现波动下降趋势,综合污染指数逐年减小,水环境状况逐步好转;影响二级坝和韩庄闸断面水环境的主成分有3个,两处泄流断面主成分均可解释为工业和生活污染指标、农业化肥污染指标、离子污染指标,但韩庄闸离子污染指标权重大于农业化肥污染指标权重;二级坝断面工业和生活污染指标与泄流量、水位呈显著正相关,离子污染指标与降雨量呈显著负相关;韩庄闸断面离子污染指标与水位呈显著负相关;上级湖工业和生活污染物冲刷入湖现象明显,上级湖和下级湖来水对离子污染指标的稀释作用明显。
In order to grasp the change trend of water environment and the influence of hydrological elements at the outlet section of Nansi Lake,the water environment data of Nansi Lake from 2004 to 2023 were collected,and the pollution index method and principal component analysis method were used to analyze the water environment and the influence of hydrological elements at the outlet section of the secondary dam and Hanzhuang sluice gate in the lake area.The results show that the pollution index of the outlet section of the secondary dam and Hanzhuang sluice gate shows a fluctuating and decreasing trend,and the comprehensive pollution index tends to decrease year by year,and the water environment situation gradually improves.There were three main components affecting the water environment of the secondary dam and the Hanzhuang sluice section,and the main components of the two outlet sections could be explained as industrial and domestic pollution index,agricultural fertilizer pollution index and ion pollution index,but the weight of the ion pollution index of Hanzhuang sluice gate was greater than that of agricultural fertilizer pollution index.The industrial and domestic pollution indexes of the secondary dam section were significantly positively correlated with the discharge volume and water level,and the ion pollution index was significantly negatively correlated with the rainfall.The ionic pollution index of Hanzhuang sluice gate section was significantly negatively correlated with water level.The phenomenon of industrial and domestic pollutants scouring into the lake is obvious,and the dilution effect of the water from the upper and lower lakes on the ionization pollution index is obvious.
作者
张健
李振
ZHANG Jian;LI Zhen(Jining Hydrological Center,Jining 272000,China)
出处
《甘肃科学学报》
2025年第5期65-72,共8页
Journal of Gansu Sciences
基金
济宁市社会科学规划研究项目(24JSGX147)
山东软科学研究会“产教融合研究智库专项”课题(SDRKX-01-202320)。
关键词
南四湖
污染指数
主成分分析
水环境变化趋势
水文要素影响
Nansi Lake
Pollution index
Principal component analysis
Water environment change trend
Hydrological influences
