Instructions

The flood simulation function combines a 2D hydrodynamic model with 3D GIS visualization technology to achieve simulation analysis and dynamic display of flood processes, specifically with the following capabilities:

• Physics-Based Simulation:Based on the terrain data of the specified area, following the basic laws of fluid mechanics, and comprehensively considering factors such as rainfall rate, surface infiltration, evaporation parameters, and hydraulic models, it simulates the entire process of flood inundation, propagation, and recession.
• 3D Dynamic Visualization:Supports converting abstract simulation data into vivid and intuitive dynamic visualization scenes. Users can observe the flood flow direction, inundation extent, and water depth changes from multiple angles and all directions, gaining an immersive understanding of disaster evolution.
• Point Query and Analysis:During the simulation, users can click to query and analyze specific simulation results at any location in the area, such as water level, water depth, flow velocity and other key indicators, providing data reference for risk assessment and emergency decision-making.
• Tiled Data Storage:The simulation result data can be exported as S3M tiles, which helps improve the loading and rendering efficiency of massive 3D data, and supports sharing, publishing, and multi-terminal collaborative applications of the results.

Workflow

The flood simulation workflow includes configuring simulation layers, drawing various water conservancy elements, performing simulation analysis to generate simulation results, and finally rendering the results as needed and querying them. The following sections will introduce the relevant operations in detail:

• Configure Simulation Layer: Describes how to create a new simulation layer, set the simulation area, configure simulation parameters, etc.
• Draw Elements: Describes how to draw water conservancy elements such as waterways, water bodies, water sources, obstacles, etc., and view and modify the attribute information of the corresponding elements.
• Run Simulation Analysis: Describes how to run the flood simulation analysis.
• Display Results: Describes how to dynamically display the simulation analysis results.
• Result Operations: Describes how to query simulation results and save simulation results, etc.

Application Scenarios

• Simulation of urban waterlogging process and risk assessment.
• Flood propagation analysis under the influence of hydraulic structures such as rivers, dams, bridges, and culverts.
• Emergency plan rehearsal, disaster demonstration, and 3D visualization display of flood results.

Functional Requirements

• Prepare basic data such as a terrain raster dataset, hydraulic structures or other buildings (EPSG:4490), and 3D polygon data of the designated flood simulation analysis area (EPSG:4490).

Version Information

The flood simulation function is available starting from SuperMap iDesktopX 2026, and requires a 3D flood simulation license to use.