The Pishihang Irrigated Area is located in Anhui Province, China, spanning the Yangtze River and the Huaihe River basins. It is one of the three super-large irrigated areas in China. In order to further improve the level of scientific dispatch and management of the area, SuperMap assisted the Pishihang Administration Bureau and created a map system using GIS+BIM integration based on SuperMap GIS. The system realizes the integration and sharing of data, provides key support for the four major functions of forecasting, early warning, preview, and plan in the irrigated area, and serves at the comprehensive dispatch center that functions as the science display center, digital sand table display center, and operation management center. This project won the 2023 Geographic Information Industry Excellent Project Gold Award in China.
The One Map of the irrigated area is the cornerstone of digital construction in this area. It gathers and visually displays foundation data. In order to solve the problems of messy data, scattered businesses, and lack of focus in businesses, the project construction team sorted out the information on the main water systems, key projects, and institutional rights and responsibilities, and built the One Map system of the irrigated area, with the main water sources, key projects, irrigation canal systems, and institutional rights and responsibilities as resource categories. In the system, there are complete categories of engineering elements, rich data content, convenient and diverse display and interactions, and intuitive visualization of data results. Taking the irrigated area businesses as the main line, it gathers water administration information such as engineering element management, water resources distribution management, and water resources dispatch, meeting the needs for daily management, water resources allocation, and channel flood control consultation.
• Data resources opening and sharing
The system combs the existing data results from the Provincial Department of Water Resources, the General Administration Bureau, and other relevant units. Under the unified data and service standards, the system integrates data resources, and forms an open and shared data base. Different units play their own part in updating and maintaining the data resources under the relevant mechanism, which helps form a data service system built and shared by all units. This data operating and updating mechanism is conducive to the effective accumulation of long sequences of data resources.
▲The smart irrigated area map system
• Integration of global data
The Map processes and integrates data such as basic geography, scene models, and engineering elements of the irrigated area to achieve 2D and 3D integration of data storage and application. At the same time, GIS engine and game engine are integrated in the system. Based on the same set of data and service base, both the GIS engine and game engine can be deployed. The GIS engine can be used to support the visualization of large, medium and small scenes and channel flood control and water resource dispatch model deduction results. And the game engine can be used to visualize high-realistic scenes in key project areas and project scheduling. In this way, simulation from macro to micro can be realized, supporting the four major business functions of forecasting, early warning, preview, and plan.
• GIS+BIM+IoT
In the 3D scene, the Map handles and integrates BIM models with oblique photography. It supports refined management of component-level hydraulic construction, and integrates real-time monitoring information from sites such as water conditions, agricultural conditions, industrial conditions, and videos, which make up the complete dynamic sensing system in the irrigated area.
• Model-driven scientific decision-making
The map system builds an intelligent decision-making model system for the irrigated area with water supply and demand forecasting, water resources allocation, and water resource dispatch as the core. It realizes dynamic prediction of water inflow, water storage, and water demand in the irrigated area, and uses scientific calculations to provide guidance on daily water resources allocation plans, simulate and optimize the water resources dispatching process, realizing the improvement of water resources management in the irrigated areas from empirical decision-making to intelligent decision-making.
• Integration of global elements in the system
Using 2D and 3D integration technology, the Map comprehensively integrates data information, focuses on business scenarios, and taps the value of data resources. The project construction team has completed the construction of more than 400 database tables for 42 types of irrigated area elements. More than 46,000 foundation data and relational data entries have been input, and more than 100 data services have been developed. At the same time, the team has realized the access to nearly 60,000 square kilometers of image. They have collected, processed and integrated digital twin base data including medium and high-level accurate terrain elevation of more than 70,000 square kilometers of area, oblique photography of 160 square kilometers of area, underwater terrain of 220 kilometers of main channel, 50 fine models and so on. The overall data volume is 1500GB, and nearly 800 kinds of geospatial services are provided.
▲Real-time monitoring of water volume in the irrigated area
• Dynamic data update through the link
The project construction team has built a foundation data operation and maintenance system in the irrigated area. When the data is updated, it can be synchronously updated and linked to the data service. The foundation data can be tagged and business themes managed according to typical application scenarios, which facilitates the development of data service interface that are highly needed and strengthens data quality management and integrated applications.
• Knowledge graph enables efficient search
By sorting out the spatial topology and business management relationships between the canal system, sluices and culverts and other key hydraulic structures in the irrigated area, and supplementing site information such as related water regimes and work conditions, the system uses knowledge graph technologies to store and manage information, which not only facilitates multi-dimensional project management in the irrigated area, but also provides support for the application of canal projects in flood control and water resource allocation and dispatch.
▲Digital twin irrigation area
The Pishihang Digital Irrigated Area has achieved initial results after its completion, providing strong technical support for the Pishihang Project in drought relief, water resources protection and optimal allocation, urban and rural water supply, farmland irrigation, ecological water replenishment, etc. It has effectively improved the utilization factor of the canal system water and the utilization ratio of the irrigation water, further extending the benefits brought by the irrigated area project.
