人民长江2026，Vol.57Issue(3)：25-32,8.DOI:10.16232/j.cnki.1001-4179.2026.03.004
丹江口水库多工况调度下水动力演变及藻类防控
Research on hydrodynamic evolution and algal control measures under multi-condition operation of Danjiangkou Reservoir
摘要
Abstract
To investigate the hydrodynamic characteristics of the Danjiangkou Reservoir and their potential impacts on algal blooms,this study developed a three-dimensional hydrodynamic model based on the EFDC method.The flow field evolution un-der multi-condition operation,including the Taocha water diversion,dam discharge,and inflow from the Hanjiang sub-reservoir were systematically simulated,and quantitatively assessed the hydrodynamic improvement effects.Results indicate that:① The Danjiang sub-reservoir exhibits low overall flow velocity with moderate spatial variation.Its surface wind-driven circulation structure remains stable,showing an average velocity increase of approximately 0.3 cm/s under various operational conditions,re-vealing limited improvement.In contrast,the Hanjiang sub-reservoir features a stable flow field structure that is sensitive to flow rate changes,coupled with significant spatial heterogeneity in flow velocity.Under short-term high-flow impacts,its average ve-locity increases by about 10 cm/s,demonstrating a significant overall improvement effect.②Reservoir flow fields are jointly driv-en by wind-induced currents and throughput flows.Wind-induced currents are the decisive factor shaping the flow field pattern in the Danjiang sub-reservoir,while throughput flows,comprising inflow from the Hanjiang sub-reservoir,diversion from the Taocha Canal,and dam releases,are key to controlling hydrodynamics in the Hanjiang sub-reservoir.③ Conventional water di-version struggles to effectively enhance Danjiang sub-reservoir's flow dynamics;algal bloom prevention should prioritize localized early warning systems and ecological measures.The water environmental capacity of Hanjiang sub-reservoir can be directly and efficiently increased through optimizing ecological discharge flows and other operational adjustments.These findings can provide scientific evidence and theoretical support for reservoir water quality assurance and ecological flow management.关键词
藻类异常增殖/水力调度/水动力模型/流场分析/丹江口水库Key words
abnormal algal proliferation/hydraulic operation/hydrodynamic model/flow field analysis/Danjiangkou Reservoir分类
资源环境引用本文复制引用
谭皓月,付一哲,罗平安,孟柯宇,宋著瀚,赵科锋..丹江口水库多工况调度下水动力演变及藻类防控[J].人民长江,2026,57(3):25-32,8.基金项目
国家自然科学基金项目(52509047) （52509047）
南水北调中线水源有限责任公司项目"丹江口库区及上游氮磷来源、变化及防控对策研究" （）
