生态补偿背景下小流域水质变化特征分析——以南充市西充河顺庆段为例  

Analysis of the Water Quality Change Characteristics of Small River Catchment in Nanchong City under the Background of Ecological Compensation:a Case Study of the Shunqiang section of Xichong River

作　　者：舒丽 胡健 王艾萍 王素华 刘巧 SHU Li;HU Jian;WANG Ili-ping;WANG Su-hua;LIU Qiao(Sichuan Nanchong Ecological Environment Monitoring Center Station,Nanchong Sichuan 637000,China)

机构地区：[1]四川省南充生态环境监测中心站,四川南充637000

出　　处：《环境科学导刊》2025年第2期78-83,共6页Environmental Science Survey

基　　金：南充市生态环境局横向课题,《南充市嘉陵江流域生态保护补偿实施方案》研究。

摘　　要：为了探索生态补偿和河长制目标考核在水污染防治与管理中的制度优势,本文以南充市西河顺庆段为例,研究分析小流域水质变化特征。2011—2023年,水质由Ⅴ类转为Ⅲ类,2019年之后稳定保持Ⅲ类,连续五年水质为良,达到目标考核水质类别;化学需氧量、高锰酸盐指数、氨氮、总磷、五日生化需氧量等5项主要指标月均浓度和年均浓度基本呈下降趋势,3—7月均值波动幅度较大,其他月均值保持稳定;化学需氧量、总磷显著下降趋势,溶解氧呈显著上升趋势;除溶解氧与其他5项指标呈显著负相关,其他指标呈显著正相关。通过主要指标浓度进行对比,主要5项指标年均浓度下降幅度在42.4%~60.9%,溶解氧升幅为39.8%。2016年以后西充河顺庆段水质改善明显,水污染防治成效显著。In order to explore the institutional advantages of ecological compensation and the target assessment of river chief system in water pollution prevention and management,this paper took the Shunqing section of Nanchong City as an example to study and analyze the characteristics of water quality changes in small watershed.From 2011 to 2023,water quality changed from category Ⅴ to category Ⅲ,and remained stable after 2019,the water quality was good for five consecutive years,reaching the target assessment;monthly average concentration and average concentration of five main indicators,including chemical oxygen demand,permanganate index,ammonia nitrogen,total phosphorus,and biochemical oxygen demand,their average fluctuation from March to July,and other monthly average remained stable;chemical oxygen demand and total phosphorus;dissolved oxygen showed negative correlation between dissolved oxygen and other 5 indicators.By comparing the concentration of the main indicators,the average annual concentration of the five main indicators was decreased by 42.4%~60.9%,and the increase of dissolved oxygen was up 39.8%.After 2016,the water quality of the Shunqing section has improved significantly,which showed obvious effects of water pollution prevention and control.

关 键 词：生态补偿 目标责任考核 西充河 特征分析 秩相关系数 相关性 

分 类 号：X824[环境科学与工程—环境工程]