风生流对贡湖湾水环境的影响过程模拟研究  

Simulation Research on Influence Process of Wind-drift Flow on Water Environment of Gonghu Bay

作　　者：吕永政 李翠梅[1] 肖昭文 LV Yong-zheng;LI Cui-mei;XIAO Zhao-wen(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;The Third Construction Co.,Ltd of China Construction Eighth Engineering Division,Nanjing 210046,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]中建八局第三建设有限公司,江苏南京210046

出　　处：《水电能源科学》2022年第2期39-42,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51109153)。

摘　　要：为分析风生流对贡湖湾水环境的影响,基于MIKE21构建贡湖湾二维水动力和水质模型,模拟分析TN、TP、NH;-N迁移变化与风生环流的关系。结果表明,该模型误差符合要求,能较为准确地模拟风生流影响下贡湖湾污染物的迁移扩散过程;风生流对贡湖湾湖流结构影响明显;夏季湖流流速全年最低,大部分介于0.8~1.2 cm/s,水体流动性与交换能力较弱,易爆发蓝藻;风生环流作用下,污染物离岸浓度降低并向湖心扩散,贡湖湾水质呈"均匀化"趋势;风生环流某种程度上推动了太湖水质"均匀化"现象。结果对太湖贡湖湾水体污染治理及水环境科学管控有一定的指导意义。To analyze the influence of wind-driven flow on the water environment of Gonghu Bay, this paper built a two-dimensional hydrodynamic and water quality model of Gonghu Bay based on the MIKE21, and studied the relationship between TN, TP, NH;-N migration changes and wind-drift circulation. The results show that the model meets the requirement of error, and can accurately simulate the migration and diffusion process of pollutants in Gonghu Bay affected by wind-drift flow;The different wind directions have a significant impact on the lake flow;The lake has the lowest velocity of the year in summer, causing weaker water fluidity and exchange capacity, an cyanobacteria is prone to eruption;Under the action of wind-drift circulation, offshore concentration of pollutants decreases and pollutants spreads to the center of Gonghu Bay, showing a trend of “homogenization” of water quality;In a way, wind-drift circulation promotes the “homogenization” of water quality in Taihu. The results are useful for water pollution control and water environmental control in Gonghu Bay and Taihu.

关 键 词：贡湖湾 风生流 MIKE21模型 水环境 模拟分析 

分 类 号：TV213.4[水利工程—水文学及水资源] X832[环境科学与工程—环境工程]