数字孪生欧阳海灌区关键技术研究和应用

Research and application of key technologies in digital twin Ouyanghai Irrigation District

摘要:

为破解灌区运行管理过程中普遍存在的水资源调配和防洪调度决策过度依赖经验、管理粗放等短板问题， 为数字孪生灌区建设积累经验，以欧阳海灌区渠首水库和右总干渠系为研究对象，探索实现水资源调配和防洪调度“四预”功能，通过水动力学模型、三维 GIS 模型共享网格技术和“需水—配水—调水”模型组合应用技术，搭建欧阳海灌区数据底板、模型库和知识库，形成数字孪生平台，开发水资源配置与调度、抗旱管理及防洪调度等系统， 初步在欧阳海灌区实现水资源按需分配和精准调度。研究成果已在 2022 年湖南省干旱情况下保障灌区中晚稻灌溉用水，同时也为 2022 年 6 月 22 日欧阳海水库发生最大入库洪峰的防洪调度提供智能决策支撑。

Abstract:

In order to solve the problems of over-reliance on experience and extensive management in water resources allocation and flood control scheduling decision-making，which are ubiquitous in the operation and management of irrigated areas，as well as to accumulate experience for the development of digital twin irrigated areas，this paper explores the implementation of the“four pre”functions of water resources allocation and flood control scheduling，focusing on Qushou reservoir and Youzonggan canal system in Ouyanghai Irrigation District. The research focuses on the shared grid of hydrodynamic models and 3D GIS models，as well as the combination application of the “water demand-distributiontransfer” model. Ouyanghai Irrigation District has built a data base，a model library，and a knowledge library，forming the digital twin platform. It also developed systems of water resources allocation and scheduling，drought resistance management，and flood control scheduling，which have achieved demand distribution and precise management of water resources in the Ouyanghai Irrigation District. The research results have ensured the irrigation water for middle-late rice in the irrigated area under the condition of drought in Hunan Province in 2022，and provided intelligent decision-making support for fl ood control operation when the maximum infl ow fl ood peak occurred in Ouyanghai Reservoir on June 22，2022.