数字孪生丹江口水质模型关键技术与应用  

Development and application of key technologies of water quality model in digital twin danjiangkou Project

作　　者：靖争 曹慧群[1] 林莉[1] 秦赫 郭晓明 JING Zheng;CAO Huiqun;LIN Li;QIN He;GUO Xiaoming(Water Environment Department,Changjiang Scientific Research Institute,Wuhan 430010,China;South-to-North Water Diversion Middle Line Water Source Co.,Ltd.,Shiyan 442700,China;Yellow River Civilization and Sustainable Development Research Center,Henan University,Zhengzhou 450046,China)

机构地区：[1]长江科学院流域水环境研究所,湖北武汉430010 [2]南水北调中线水源有限责任公司,湖北十堰442700 [3]河南大学黄河文明与可持续发展研究中心,河南郑州450046

出　　处：《人民长江》2024年第8期222-230,共9页Yangtze River

基　　金：南水北调中线水源工程科研项目“数字孪生丹江口工程先行先试建设”(GXTC-C-22870043);中央级公益性科研院所基本科研业务费项目(CKSF2023337/SH);国家重点研发计划项目(2022YFC3204001)。

摘　　要：数字孪生技术作为近年来的创新技术,通过构建精确的虚拟模型实现了对实际物理世界的高度映射,为解决传统水质安全管理中的难题提供了全新的视角和方法。水质模型是实现数字孪生湖库水质安全精准映射和虚实互动的核心。围绕南水北调中线工程的水源地——丹江口水库的水质安全管理需求,针对传统模型存在的模拟失真、误差累积、计算速度慢及无法满足突发污染事件实际决策要求等各种技术难题,提出了一种新型三维水动力水质模型,并利用实地流场观测和水质监测数据进行了模型校验。结果表明:该模型主要改进了组合σ/z网格、总磷本构方程、突发污染投药处置模拟、OpenMP并行计算、水动力预计算和双时间步长模式、污染团扩散轨迹示踪等关键技术,显著提升了模型的计算效率和模拟精度;通过在2023年汉江秋汛期间对丹江口水库水质安全管理的实际应用,证明了该模型能有效支持水质安全“四预”功能(预报、预警、预演、预案),模拟结果为汉江秋汛防御及汛后蓄水水质安全保障提供了重要技术支撑。Digital twin technology,as an innovative advancement in recent years,achieves high-precision mapping of the real physical world by constructing accurate virtual models.This provides a new perspective and approach to addressing the issues in traditional water quality safety management.Water quality models are central to realizing precise mapping and virtual-real interaction of water quality in digital twin lakes and reservoirs.To address the water quality safety management needs of Danjiangkou Reservoir,the source of the Middle Route of the South-to-North Water Diversion Project,a novel three-dimensional hydrodynamic water quality model was proposed.This model overcame various technical challenges of traditional models,including simulation distortion,error accumulation,slow computing speed,and the inability to meet decision-making requirements for sudden pollution events.The model was calibrated using in-situ flow field observations and water quality monitoring data.Results demonstrated that the model significantly enhances computational efficiency and simulation accuracy through key technologies such as combinedσ/z grid,total phosphorus constitutive equation,simulation of sudden pollution treatment,OpenMP parallel computing,hydrodynamic pre-computation,dual time-step mode,and pollution plume diffusion trajectory tracing.Practical application during the Hanjiang River autumn flood in 2023 proves the model′s effectiveness in supporting the"four-pre"functions of water quality safety(forecast,pre-warning,rehearsal,and pre-emergency planning).The simulation results provide crucial technical support for flood prevention and post-flood water quality safety assurance in the Hanjiang River.

关 键 词：数字孪生 水质安全 水质模型 水动力水质模型 丹江口水库 

分 类 号：X832[环境科学与工程—环境工程] TP391.985[自动化与计算机技术—计算机应用技术]