摘要
【目的】我国南方平原地区地势低缓,河网结构复杂,为快速解决该地区因河网水动力不足而引起的水环境问题,急需研究河网水体运行状况调控方案。【方法】以太湖流域南浔区沈庄漾“溇港圩田”河网作为研究对象,构建Mike 21 FM二维河网水动力模型,结合研究区河网改造后的水利工程布置和调度规则,提出定位增压的7种水动力调控方案,模拟分析河网在不同方案下流场分布规律,探究圩区河网水动力提升和流场改善的优化调度方法。【结果】模拟结果表明:活水和引排水方案虽能有效改善河网水动力,但对于中心水塘的水动力驱动效果不佳。在开启西南侧河道水泵和西部泵闸的情况下,河网内大部分区域的流速基本能维持在0.05 m/s左右,部分河道的流速能达到0.3 m/s以上,并且对中心水塘水体驱动效果最好。【结论】综合分析表明:所设计的7种调控方案均能有效地提升河网水动力,在开启西南侧河道1台水泵和西部泵闸时,流场分布最均匀且水动力整体提升效果最佳。研究结果可为南方平原河网的水利工程水动力调控提供参考。
[Objective]The southern plain area of China is low and gentle,and the river network structure is complex.In order to quickly solve the water environment problems caused by the lack of water power in the river network in this area,it is urgent to study the regulation scheme of the river network water operation.[Methods]This study took the“Lougang Polder”river network in Shenzhuangyang in Nanxun District of the Taihu Lake Basin as the research object,constructed the hydrodynamic model of Mike 21FM two-dimensional river network,combined with the layout and scheduling rules of water conservancy projects after the transformation of the river network in the study area,proposed seven hydrodynamic regulation schemes for positioning and pressurization,simulated and analyzed the distribution of flow fields under different schemes of river network,and explored the optimal scheduling method of hydrodynamic improvement and flow field improvement of river network in the polder area.[Results]The simulation result show that although the live water and water diversion and drainage scheme can effectively improve the hydrodynamic force of the river network,the hydrodynamic driving effect of the central pond is not good.With the southwest river water pump and the west pump gate open,the flow velocity in most areas of the river network can basically maintain around 0.05 m/s,and the flow velocity in some rivers can reach more than 0.3 m/s,and the driving effect on the central pond water body is the best.[Conclusion]The comprehensive analysis shows that the seven control schemes designed can effectively improve the hydrodynamic force of the river network.When one water pump and the west pump gate are opened in the southwest river channel,the flow field distribution is the most uniform and the overall hydrodynamic force improvement effect is the best.The research result can provide a reference for the hydrodynamic regulation of water conservancy projects in the southern plain river network.
作者
徐存东
訾亚辉
黄嵩
赵志宏
任子豪
胡小萌
王海若
XU Cundong;ZI Yahui;HUANG Song;ZHAO Zhihong;REN Zihao;HU Xiaomeng;WANG Hairuo(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,Henan,China;Key Laboratory for Technology in Rural Water Management of Zhejiang Province,Hangzhou 310018,Zhejiang,China;Henan Provincial Hydraulic Structure Safety Engineering Research Center,Zhengzhou 450046,Henan,China)
出处
《水利水电技术（中英文）》
北大核心
2023年第7期161-170,共10页
Water Resources and Hydropower Engineering
基金
国家自然科学基金项目(51579102)
浙江省基础公益研究计划项目(LZJWD22E090001)
浙江省重大科技计划项目(2021C03019)
中原科技创新领军人才支持计划(204200510048)
河南省科技攻关项目(212102310273)
河南省高等学校重点科研项目计划(20A570006)。
关键词
水动力模型
调控方案
圩区河网
流场分布
hydrodynamic model
regulation scheme
polder river network
flow field distribution
