四川环境2026，Vol.45Issue(4)：10-19,10.DOI:10.14034/j.cnki.schj.2026.04.003
成都市锦江流域底泥中磷素释放特性研究
Study on Characteristics of Phosphorus Release from Sediments in the Jinjiang River Basin,Chengdu
佘佳 1肖晓 1陈新拓 1王照丽 2陈磊1
作者信息
- 1. 成都市环境保护科学研究院,四川成都 610072
- 2. 成都市污染源监测中心,四川成都 610066
- 折叠
摘要
Abstract
In order to clarify the release patterns of endogenous phosphorus from sediments in the Jinjiang River Basin and its impact on water quality,sediment and overlying water samples were collected from typical river sections,laboratory simulations under different flow velocities and disturbance conditions were combined,and phosphorus speciation analysis was conducted in this study.The release rates of endogenous phosphorus were quantified,and the underlying mechanisms were revealed.The results indicated that:1)Under slow flow conditions(0.3 m/s),the total phosphorus release rates at South Lake Park,Yong'an Bridge,and Huanglongxi River were 21.89,21.08,and 5.16 mg/(m2·d),respectively;under fast flow conditions(0.5 m/s),the rates increased to 66.95,61.95,and 18.56 mg/(m2·d).2)Higher overlying water flow velocity enhanced phosphorus release,with the effect degree following the order:the total phosphorus＞dissolved total phosphorus＞centrifuged total phosphorus.3)Phosphorus was predominantly released in particulate form,accounting for 89％-99％of the total released phosphorus,with its release behavior jointly determined by disturbance processes and sediment suspension performance,while dissolved phosphorus exhibited a slow release trend.4)Total phosphorus was predominantly released during the constant-rate phase at the Nanhu Park and Yong'an Bridge sampling sites,whereas at the Huanglongxi site,total phosphorus was mainly released during the start-up phase.This experiment provides an important scientific basis for analyzing pollutant sources in the water bodies of Chengdu and for improving the refined management of the water environment.关键词
底泥/磷素释放/水体扰动/流域Key words
Sediment/phosphorus release/water disturbance/basin分类
资源环境引用本文复制引用
佘佳,肖晓,陈新拓,王照丽,陈磊..成都市锦江流域底泥中磷素释放特性研究[J].四川环境,2026,45(4):10-19,10.
