基于PCA和SOM模型的珊溪水库水质时空变化特征研究  

Spatio-temporal Variation Characteristic Analysis of Water Quality in Shanxi Reservoir Based on PCA and SOM Models

作　　者：许博 杜双双 杨伯华 曾广恩 李为[1,2] Xu Bo;Du Shuangshuang;Yang Bohua;Zeng Guang en;Li Wei(State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Aquatic Biology,Chinese Academy of Sciences,Wuhan 430072,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanxi Water Source Protection Branch,Wenzhou Public Utilities Development Group,Wenzhou 325304,China;Wenzhou Hydrological Management Center,Wenzhou,Wenzhou 325000,China)

机构地区：[1]中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,湖北武汉430072 [2]中国科学院大学,北京100049 [3]温州市公用事业发展集团有限公司珊溪水源保护分公司,浙江温州325304 [4]温州市水文管理中心,浙江温州325000

出　　处：《环境科学与管理》2025年第4期29-34,81,共7页Environmental Science and Management

基　　金：国家重点研发计划课题(2019YFD0900601);中国科学院青年创新促进会人才项目(2019331)。

摘　　要：为全面了解珊溪水库的水环境状况,并评估时空变化特征。通过分析15个监测位点的周年逐月水质监测数据,综合分析了水库水质的时空变化。结果表明珊溪水库水质整体良好,各项指标均达到地表水Ⅲ类水平,其中10个月份达到地表水Ⅱ类水平。营养状态指数显示,水库全年维持中度营养状态,水质定义为良好。夏季的水温、氨氮、总磷、高锰酸盐指数和pH值显著高于其他季节,溶解氧在秋季最高,显著高于春夏两季。PCA和SOM的结果表明,秋冬季水质优于春夏季。空间上,支流入水域的水质较差。研究可为珊溪水库的水质保护和水资源管理提供依据。To comprehensively understand the water environment of the Shanxi Reservoir and evaluate its spatiotemporal variation characteristics,monthly water quality monitoring data from 15 monitoring sites over a year were analyzed.The results indicate that the overall water quality of the Shanxi Reservoir is good,with all indicators meeting Class III standards of surface water quality,and 10 months reaching Class II standards.The trophic state index shows that the reservoir maintains a moderate trophic state throughout the year,categorizing its water quality as good.In summer,water temperature,ammonia nitrogen,total phosphorus,permanganate index,and pH are significantly higher compared to other seasons,while dissolved oxygen peaks in autumn,showing significantly higher levels than in spring and summer.PCA and SOM analyses reveal that water quality in autumn and winter is superior to that in spring and summer.Spatially,water quality in tributary inflow areas is poorer.This study provides a reference for water quality protection and water resource management of the Shanxi Reservoir.

关 键 词：水质 时空变化 主成分分析 SOM网络 珊溪水库 

分 类 号：X830.2[环境科学与工程—环境工程]