感潮河流水动力水质周期性异质特征研究  

Study on Periodic Spatiotemporal Heterogeneity Characteristics of Hydrodynamics and Water Qualityof TidalRivers

作　　者：凌禛 李一平[1] 程月 王亚宁 戴妍 韩清云 LING Zhen;LI Yi-ping;CHENG Yue;WANG Ya-ning;DAI Yan;HAN Qing-yun(College of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学环境学院,江苏南京210098

出　　处：《环境科技》2025年第1期1-7,共7页Environmental Science and Technology

基　　金：国家自然科学基金资助项目(52039003)。

摘　　要：感潮河流因受径潮相互作用影响,故水体运动和水质变化复杂,污染负荷易堆积。以长江下游一级支流石碛河为例,基于EFDC建立水动力-水质耦合模型,分析感潮河流水动力水质的周期性异质特征。结果表明,石碛河不同区域的水动力水质变化存在显著差异。潮区界变化区域内及上游河道受径流主导,水质变化不明显;潮流界上、下游约200 m之间始终存在低流速区间,涨潮时污染物受径潮相互作用在此堆积,水质易超标,且潮流界位置呈周期性变化;潮流界下游河道受潮流影响较大,水质周期性波动幅度更大。该研究结果为感潮河流治理和管控提供了一定的科学支撑。Tidal rivers are influenced by the interaction between upstream runoff and downstream currents,resulting in complex water movement and water quality changes,and pollution loads are prone to accumulate.This article takes the Shiqi River,a primary tributary of the lower reaches of the Yangtze River,as the research area.Based on EFDC,a coupled hydrodynamics and water quality model are established to analyze the periodic heterogeneity characteristics of water dynamics and water quality.The results show that there are significant differences in hydrodynamic changes and water quality migration characteristics in different regions of Shiqi River.Rivers above the tidal mark and rivers within the tidal mark change zone are mainly affected by runoff,and water quality does not change significantly.There is always a low flow velocity range about 200 meters upstream and downstream of tidal current mark.During high tide,pollutants are affected by the interaction between upstream runoff and downstream tidal currents and migrate here,accumulating,and water quality is prone to exceed the standard.The position of the tidal current mark changes periodically.The downstream river of the tidal current mark is greatly affected by the tidal current.In this place the water quality exhibits greater periodic fluctuations.The result of this study provides scientific support for the pollution control and management of tidal rivers.

关 键 词：感潮河道 水动力水质 EFDC 粒子追踪 

分 类 号：X2[环境科学与工程—环境科学]