环境工程学报2026，Vol.20Issue(4)：1112-1121,10.DOI:10.12030/j.cjee.202508048
南方网状水系底泥污染特征及污染源解析:以珠江三角洲顺德区南顺联安围和群力围河网为例
Sediment pollution characteristics and source apportionment in Southern River Networks:A case study of Liananwei and Qunliwei river networks in Shunde District of the Pearl River Delta
摘要
Abstract
This study revealed the spatial differentiation characteristics,pollution source contributions,and driving mechanisms of sediment pollution in southern mesh river networks,and provided a scientific basis for precise management.In this study,surface sediment samples were collected from 150 monitoring sites in the river networks of Lian'anwei and Qunliwei in Shunde District of Pearl River Delta.The pollution characteristics and sources of nitrogen,phosphorus,heavy metals,and organic matter were analyzed by multi-dimensional physical and chemical analysis,spatial statistical methods,and Positive Matrix Factorization(PMF)model.Sediment pollution showed"three-distinct-pattern"spatial heterogeneity:urban river reaches had prominent nitrogen and organic pollution(average TN was 2 456 mg·kg-1,organic index≥0.5 accounted for 18.7％),with organic matter(OM)accumulation as the core feature of organic pollution;Phosphorus enrichment was significant in the agricultural area(TP average 1 247 mg·kg-1),and areas surrounding industrial zones had extreme point-source heavy metal pollution(over-standard rates of Pb,Cd,and Cr were 12.7％,8.0％,and 5.3％,respectively).PMF model quantitatively showed that domestic sources contributed 59.7％～60.3％of nitrogen and organic matter,agricultural non-point sources dominated 64.8％of phosphorus input,and industrial sources contributed 81.5％～84.1％of heavy metals.It also identified secondary contributions of domestic sources to phosphorus(12.3％)and industrial sources to zinc(18.7％).The spatial differentiation of pollution is directly coupled with the intensity of human activities.Direct sewage discharge in urban areas,excessive application of phosphorus fertilizer in agricultural areas,and historical illegal discharge in industrial areas were the core driving factors.The"zoning and classification"management paradigm proposed in this study can provide references for the treatment of sediment in meshed river systems at home and abroad.关键词
网状水系/底泥污染/污染源解析/空间分异/珠江三角洲Key words
network river system/sediment pollution/pollution source apportionment/spatial heterogeneity/Pearl River Delta(PRD)分类
资源环境引用本文复制引用
张博,袁博,姚普静,张西锋,郭梦京..南方网状水系底泥污染特征及污染源解析:以珠江三角洲顺德区南顺联安围和群力围河网为例[J].环境工程学报,2026,20(4):1112-1121,10.基金项目
国家自然科学基金资助项目(42377072) （42377072）
陕西省自然科学基金资助项目(2025JC-YBMS-337) （2025JC-YBMS-337）
