Study on the Spatiotemporal Distribution Characteristics of COD in Surface Water of Xuchang City
This paper aims to reveal the surface water quality and its seasonal and spatial variations in Xuchang City.Based on the monitoring data from the Xuchang Environmental Monitoring Information Center from March 2022 to February 2023,this study uses factor evaluation and regression analysis to analyze the spatiotemporal dis-tribution characteristics of CODCr(chemical oxygen demand)and CODMn(permanganate index)in surface water in Xuchang city.The conclusion shows that:①using CODCr as the evaluation criterion,the overall seasonal and spa-tial ranking of water quality is as follows:winter＞autumn＞summer＞spring,and the western part of Xuchang urban area＞southern part＞northern part＞eastern part;②based on CODMn as the evaluation criterion,the overall water quality is excellent with no significant spatial differentiation;③there is a significant correlation between CODCr and CODMn in the water bodies of the old bridge of Xuchang City Expressway,Xuyou Road Bridge(Baling River),Zhaohe Village Bridge,Rubber Dam,Huanglongchi Sluice,and Xuyou Road Bridge(Yunliang River)sec-tions.
CODCrCODMnspatiotemporal characteristicsrelevanceXuchang City
NETL
NSTL
万方数据
