人民长江2026，Vol.57Issue(3)：1-7,32,8.DOI:10.16232/j.cnki.1001-4179.2026.03.001
陶岔渠首局部时段水体溶解氧浓度偏低成因分析
Causes of low dissolved oxygen at Taocha Canal Headworks during specific periods
摘要
Abstract
In the summer of 2025,the water body area at the Taocha Canal Headworks of the Danjiangkou Reservoir exhibited abnormally low dissolved oxygen(DO)concentrations.To ensure stable compliance of water quality at the Taocha Canal Head-works,this study systematically analyzed the patterns of DO concentration changes during the monitoring period,investigated the e-volution characteristics of environmental conditions,and revealed the causes of low DO concentrations.Results indicated that:①DO concentrations in the study area exhibited an overall fluctuating downward trend over time.Spatially,DO concentrations de-creased from the center of Danjiang sub-reservoir toward the Taocha Canal Headworks,with stable vertical stratification observed in the water body.② Correlation analysis and mechanism investigation indicated that the decline in DO concentrations resulted from the combined effects of hydrodynamics,physicochemical properties of the water body,and engineering measures.Weak ther-mal stratification coupled with low flow velocities inhibited vertical oxygen transport and atmospheric reoxygenation processes.Nu-trients accelerated DO depletion by driving microbial aerobic decomposition,while the deployment of algal barriers further exacer-bated DO decline and vertical stratification by altering local hydrodynamics and intensifying water stratification.This study recom-mends that future water quality management should holistically consider the ecological effects of hydrodynamic optimization,con-trol of external nutrient inputs,and engineering interventions such as algae-blocking nets to ensure reservoir water quality safety.关键词
溶解氧/水文水动力/营养盐/拦藻网/丹江口水库/陶岔渠首/南水北调中线工程Key words
dissolved oxygen/hydrodynamics/nutrients/algae-blocking nets/Danjiangkou Reservoir/Taocha Canal Head-works/Middle Route of the South-to-North Water Diversion Project分类
资源环境引用本文复制引用
程靖华,潘璐,彭晓然,金海洋,谭皓月,陶晶祥..陶岔渠首局部时段水体溶解氧浓度偏低成因分析[J].人民长江,2026,57(3):1-7,32,8.基金项目
国家自然科学基金面上项目(52579057) （52579057）
中央级公益性科研院所基本科研业务费项目(CKSF2025733/SH) （CKSF2025733/SH）
南水北调中线水源有限责任公司科研专项项目(ZSY/YG-ZX(2023)022) （ZSY/YG-ZX(2023）
