湘江流域永州段水质和水文气象因素变化规律及其相关分析

为推进湘江流域永州段水资源保护,加强水质预测,利用2014—2018年冷水滩断面水文气象和水质监测数据,基于相关分析、主成分分析等多元统计方法,研究分析了湘江冷水滩断面水质、水文气象因素变化规律以及两者的相关关系、量化关系。结果表明:该地区水文气象因素对水质影响最大,水质与水文气象因素之间的相关关系显著,水文气象因素是影响湘江流域水质的重要因素;溶解氧与水温、降水量呈线性回归关系,高锰酸盐指数与水位呈线性回归关系,高锰酸盐指数拟合回归方程的精度略低于溶解氧拟合回归方程。

Evolution Law and Related Analysis of Water Quality and Hydrometeorological Factors in Yongzhou Section of Xiangjiang River Basin

In order to promote the protection of water resources and strengthen the water quality prediction in Yongzhou section of Xiangjiang River Basin,based on the hydrometeorological and water quality monitoring data of the Lengshuitan section from 2014 to 2018,the multi-statistical methods such as correlation analysis and principal component analysis were used to study and analyze the evolution law of water quality and hydrology,the correlation between them and the quantitative relationship.The results showed that hydrometeorological factors in this area had the greatest impact on water quality.The correlation between water quality and hydrometeorological factors was significant,and hydrometeorological conditions were important factors affecting the water quality of Xiangjiang River Basin.There was a linear regression relationship between dissolved oxygen and water temperature and rainfall,likely permanganate index had a linear regression relationship with water level.The accuracy of the permanganate indexregression equation was slightly lower than the fitted regression equation of dissolved oxygen.