生态与农村环境学报2025，Vol.41Issue(5)：609-616,8.DOI:10.19741/j.issn.1673-4831.2024.0191
南四湖水体及沉积物氮、磷空间分布特征及生态风险评价
Spatial Distribution Characteristics of Nitrogen and Phosphorus in the Water and Sediments of the Nansi Lake and the Assessment of Ecological Risk
摘要
Abstract
To investigate the spatial distribution and pollution characteristics of nitrogen and phosphorus in the water and surface sediments of the Nansi Lake watershed,the concentrations of total nitrogen(TN)and total phosphorus(TP)in the water and surface sediments of the lake and the lake's 53 inlets,were measured,and their distribution and pollution characteristics were analyzed.The results indicate that the water quality in the Nansi Lake area is classified as Class Ⅲ and the water quality gradually improves from north to south.The average TN and TP concentrations in the surface sedi-ments of the lake were 2 071 and 623 mg·kg-1,respectively.The average TN and TP concentrations of the surface sedi-ments of lake's inlets were 1 765 and 608 mg·kg-1,respectively.The TN concentration in the lake sediments is signifi-cantly higher than that in the lake's inlet sediments(P＜0.001),while the difference in their TP concentrations is not sta-tistically significant.The results of sediment pollution evaluation in the Nansi Lake show that the values of TN pollution in-dex(STN),TP pollution index(STP),and comprehensive pollution index(FF)in the lake are 1.86,1.39,and 1.74,respectively,indicating moderate pollution.The sediment pollution in different sections of the lake varies greatly,and the TN and TP in the Dushan Lake section and the TN in the Weishan Lake section have reached to the level classified as heavily polluted,implying a looming threat of eutrophication.关键词
南四湖/表层沉积物/营养盐/生态风险评价Key words
Nansi Lake/surface sediment/nutrient/ecological risk assessment分类
环境科学引用本文复制引用
陈雅丽,张建国,杨刚,何浏洋,孙健..南四湖水体及沉积物氮、磷空间分布特征及生态风险评价[J].生态与农村环境学报,2025,41(5):609-616,8.基金项目
南四湖流域地下水环境状况调查评估(二期)项目 （二期）
