人民长江2025，Vol.56Issue(12)：40-49,10.DOI:10.16232/j.cnki.1001-4179.2025.12.004
丹江口库区入库河流水质现状与趋势及污染控制
Water quality status,trends,and pollution control of inflow rivers in Danjiangkou Reservoir Area
摘要
Abstract
To systematically assess the nutrient pollution status of the inflow rivers in the Danjiangkou Reservoir Area and its impact on the reservoir water quality,this study analyzed the spatiotemporal characteristics of key nutrient-related water quality indicators—total phosphorus(TP),total nitrogen(TN),and the permanganate index(CODMn)—in 16 inflow rivers based on monitoring data from 2021 to 2023,as well as their interannual trends.The results showed that:① from 2021 to 2023,the river with the poorest water quality was Shending River in the Hanjiang section,followed by Sihe River and Jianghe River.Rivers with better water quality included the Hanjiang River and Duhe River in the Hanjiang section,as well as Taohe River in the Danjiang section.The seasonal variation characteristics of pollutant concentrations in the reservoir's inflow rivers were complex.For the same river,TP and CODMn exhibited similar seasonal patterns,with most rivers showing higher concentrations during the flood sea-son(e.g.,Hanjiang River,Duhe River,Taogou River,Danjiang River).In contrast,TN concentrations in most rivers were lower during the flood season(e.g.,Shending River,Sihe River,Danjiang River,Laoguan River).② Since the 13th Five-Year Plan period,significant progress has been made in the treatment of heavily polluted tributaries,with TP pollution control achieving bet-ter results than TN control.Compared to the2012～2014 period during the12th Five-Year Plan,TPconcentrations significantly decreased in 12 of the 16 inflow rivers,with reductions exceeding 50%in 8 rivers.The historically most polluted rivers—Shending River,Sihe River,and Jianghe River—experienced TP concentration reductions of 77%,84%,and 91%,respectively.Only 8 riv-ers showed reductions in TN and CODMn concentrations.Currently,elevated concentrations of nutrients such as nitrogen,phosphor-us,and CODMn in tributaries like Shending River and Sihe River remained significant risk factors for algal blooms in the backwater areas of these tributaries.TP concentrations in most rivers were higher than those in the main reservoir,while TN concentrations in all rivers were substantially higher than in the reservoir.Appropriate control targets for TP and TN at key monitoring sections of in-flow rivers should be established from the perspective of aquatic ecological security in the reservoir area.关键词
氮/磷/高锰酸盐指数/入库河流/丹江口水库Key words
nitrogen/phosphorus/permanganate index/inflow rivers/Danjiangkou Reservoir分类
资源环境引用本文复制引用
娄保锋,彭晓然,许秀贞,郭雪勤,徐杰,卓海华..丹江口库区入库河流水质现状与趋势及污染控制[J].人民长江,2025,56(12):40-49,10.基金项目
南水北调中线水源有限责任公司科研专项(ZSY/YG-ZX(2023)022) （ZSY/YG-ZX(2023）
湖北省自然科学基金项目"丹江口水库颗粒有机碳来源及储量的遥感估算研究"(2025AFB981) （2025AFB981）
