A key step for smart water conservancy! How to build a digital twin watershed?

The digital twin basin is the core and key to promote the construction of smart water conservancy, and it is an important measure to promote the high-quality development of water conservancy in the new stage. The full-space digital twin technology helps to integrate watershed spatial data in an all-round and multi-level manner, build a solid platform scene floor, and lay the foundation for the realization of business informatization and digitalization of the watershed platform.

Chengdu Hantao Tiantu Technology Co., Ltd. (hereinafter referred to as "Hantao Tiantu " ) relies on the self-developed digital twin platform and the SuperMap 3D GIS game engine development platform to carry out the construction and development of digital twin watershed platforms based on the "2+N" system. Research has established a full-space digital twin watershed platform (hereinafter referred to as the "platform") with the physical watershed as the unit, spatio-temporal data as the base, water conservancy model as the core, and water conservancy knowledge as the drive, laying a solid foundation for the realization and expansion of subsequent digital twin watershed applications . Solid scene and technical foundation.

Application Status of Digital Twin River Basin

After years of construction, the informatization of river basin water conservancy has achieved remarkable results, but overall it is still in the initial stage of smart water conservancy. There are obvious shortcomings and weak links.

Twin Scenes of River Basins

The platform construction has initially realized the information integration and visualization of water conservancy facilities, hydraulic equipment, and water conservancy applications, but it is still in the exploratory stage in terms of how to deeply integrate with water-related application services, and the degree of popularization is still lacking. The main problems are as follows:

The data drive is not enough to support the perception of all factors in the watershed

The acquisition of hydrological monitoring data within the basin . To achieve hierarchical aggregation, it is difficult to support accurate forecasting and fine scheduling at the watershed scale; the collection of watershed monitoring data is insufficient, and new technologies such as new sensor equipment, intelligent video cameras, navigation and positioning, and remote sensing have not been widely used, and Internet of Things technology has not been fully applied.

Insufficient model support to meet business simulation needs

The connection between the models is poor, lacking the overall design and integration; the continuous application of the models is insufficient, and the lack of unified management; the construction of some water conservancy facilities and hydraulic structure models is relatively old, and the accuracy of the models is insufficient, and needs to be upgraded; the digital twin application that has been carried out The 3D model construction in the project is mainly a pilot project, and the scope and accuracy are not enough to support the application requirements.

Insufficient knowledge drive to improve the level of business informatization

The construction of the knowledge platform belongs to the exploratory stage, and the development of informatization in various business fields is unbalanced and insufficient, and does not match the needs of realizing water-related comprehensive service applications.

Full-space digital twin watershed construction goals

The construction of the full-space digital twin watershed mainly includes: the scene construction of the digital twin model of the watershed, the construction of intelligent application support, and the research and development of "2+N" system applications. The main construction goals are as follows :

Complete the construction of the twin bases of the river basin, and realize the foundation for the upper-level business application

Build a data base to realize the digital mapping of river systems, water conservancy projects and affected areas in the basin, and build a solid foundation for digital twin basins. By improving the perception capability of the Internet of Things and providing sufficient data support for the platform, the dynamic, real-time information interaction and deep integration between the physical watershed and the digital watershed can be realized, and the twinning of the two can be maintained.

Carry out intelligent simulation to realize simultaneous simulation of digital watershed and physical watershed

On the basis of the digital watershed, with the "four pre-prediction" business as the core, the precise simulation of the whole process of water conservancy phenomena and governance management activities is realized, and the simultaneous simulation operation, virtual-real interaction, iterative optimization and empowerment of the digital twin watershed and the physical watershed are achieved Water conservancy business.

Use the knowledge platform to complete the generation of decision-making proposals to achieve precise decision-making support

According to the technical framework of "big platform + micro-service", build "2+N" business applications for water-related services, strengthen data support for watershed governance, ensure scientific decision-making plans and effectively support precise decision-making, and focus on building intelligence The business application system assists in formulating optimal solutions to meet different business objectives, so as to avoid risks, improve efficiency and reduce losses to the greatest extent.

Construction of space-time base of full-space digital twin watershed platform

The premise of the construction of the space-time base of the digital twin watershed platform is to clarify user needs and data systems, and after clearing user positioning, organize and classify construction according to needs. The main contents include: macro watershed scenes and micro water conservancy project scene construction

Macro watershed scene construction

There are two construction modes for macro watershed scenarios according to business application requirements. The first is a platform that serves macro-level river basin management. On the basis of collecting imagery, topography, underwater topography, and vector data, it will also collect key areas including but not limited to flood storage areas, flood detention areas, flood discharge areas and their surrounding areas. Regional model data, fully constructing spatial scenes; the second is a platform for micro-water conservancy project management, which collects macro-scene images, topography, and vector data and adopts spatial overlay technology to realize macro-floor construction, which is used in combination with micro-water conservancy project scenes.

Relying on the digital twin platform developed by Hantao Tiantu and combined with the SuperMap 3D GIS game engine development platform, Hantao Tiantu has completed the construction of a macro watershed scene, which can realize the visual presentation of information such as topography and spatial distribution of the watershed. In order to ensure the efficient collaboration between the macro watershed scene and the real world, the platform supports real-time data update according to different data accuracy and update cycle.

Micro water conservancy project scene construction

Microscopic water conservancy project scene construction mainly includes: collecting images, terrain, underwater terrain, vector, 3D model, BIM model and other data of water conservancy project reservoir area, dam area and downstream affected area of the project; updating data of different types and precision in time; Taotiantu's self-developed digital twin platform and SuperMap 3D GIS game engine development platform realize micro-hydraulic engineering scene reconstruction.

Digital twin of hydropower station

Construction of a full-space digital twin watershed platform

The construction of the digital twin basin focuses on improving the "four pre-planning" capabilities, fully improving two applications, expanding N services, completing the construction of the "2+N" business application system, and serving users with multi-level collaboration and cascade scheduling

Strengthening the "Four Preliminary" Capabilities

The "four forecasts" are forecast, early warning, rehearsal and pre-planning, which are the basic business capabilities widely used in the digital twin river basin platform. Strengthening the "four predictions" capabilities mainly depends on consolidating the basic computing power, fully connecting IoT sensing devices, integrating watershed-related data to enrich the calculation database, and continuously training and optimizing algorithm models to comprehensively improve the "four predictions" capabilities and the accuracy of platform forecasting.

Complete 2 applications

The two applications are watershed flood control application and water resource management and allocation application, both of which are important propositions in the application field of digital twin watershed platform. Based on the national flood control and drought relief command system, the flood control in the river basin will be based on the national flood control and drought relief command system, expand and customize the flood control digital scene in the river basin, upgrade and improve flood forecasting and early warning functions, focus on building simulation modules, supplement the comprehensive drought monitoring and early warning function and check dam flood forecasting function, and build a flood control and drought relief "four "pre-preparation" business platform; water resources management and allocation application combined with the national water resources monitoring capacity building project and the national groundwater monitoring project to improve the digital scene of water resources management and allocation, and integrate information systems such as water intake permit approval, water resource tax (fee) and water resources tax (fee) Resource supervision and early warning, allocation management decision-making and other functions, build a comprehensive platform for water management government services and allocation.

Expand N business

The platform will combine the application scenarios of water conservancy project construction, improve N business application scenarios for water conservancy project construction and operation management, South-to-North Water Diversion Project, river and lake chief system and river and lake management, water and soil conservation, rural water conservancy and hydropower, etc., and upgrade and improve the scene business application functions, accelerate the depth of integration between the digital twin river basin platform and user business; deeply understand water-saving management, water policy enforcement, water conservancy supervision, water conservancy public services and other application businesses, establish a sound database, develop and improve risk assessment models, and integrate countries, industries and water conservancy Departmental standards, strengthen the depth of business collaboration, and build a user-level, full-cycle digital twin watershed platform.

Innovative technologies help platform construction

Optimize digital twin 3D engine rendering technology

The platform further optimizes the digital twin 3D engine rendering technology, effectively solves the rendering problems of images, terrains and other objects, and facilitates the construction of application scene space for watershed level and water conservancy engineering level.

Optimizing the 3D Simulation Technology Based on Algorithms

Through the combination of data and algorithms, the platform drives the 3D simulation with the results obtained by the algorithm. Under the guarantee of the high rendering engine capability, the algorithm-driven simulation is realized, making the 3D simulation results more realistic and instructive.

Research and development of watershed-oriented data standard system and data collaborative governance technology

Based on the water conservancy industry, the platform compiles a set of data standard system suitable for watershed management based on previous business accumulation, service platform data collection, service distribution, constrains the consistency of data from the source, and ensures the stable operation of the platform.

Empowering multi-sector water conservancy intelligent construction

The platform integrates full-scenario and full-service application data in watershed business applications, eliminates system chimneys, breaks data barriers, and builds a spatial twin covering macro watershed scenes and micro water conservancy engineering scenes to meet data interoperability, information sharing, scene sharing, and collaborative applications , Linkage to deal with sudden application needs, improve the high-level dispatching ability and grass-roots initiative of watershed governance, and enhance the intelligence of the watershed application platform. At present, it has provided water-related application platform services for multiple river basin management companies, provincial-level water conservancy departments, municipal-level water affairs bureaus and other application departments to empower the intelligent construction of water conservancy.?

Flood evolution simulation of watershed scene

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