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Research and Application of UE5-based Digital Simulation Technology for Water Flow of Hudu River
LU Han-you, ZHAO Wen-gang, JIANG Jie-yu, WANG Zai-ai, LIU Xiao-qun, LI Zhi-wei
Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (8) : 157-163.
PDF(2809 KB)
PDF(2809 KB)
Research and Application of UE5-based Digital Simulation Technology for Water Flow of Hudu River
River simulation technology plays a crucial role in watershed digital twin. However, current precise modelling of physical rivers to virtual watershed faces several deficiencies. To address such deficiencies, a 3D hydrodynamic model was developed in this study based on terrain measurements, remote sensing images,hydrological data, and water surface line calculated by hydrological model. The UE5 engine and Fluid Flux plug-in rendering was employed in the model. Blueprints were reconstructed and compiled, data assets were trained and coordinate system disparities were reconciled to finally achieve high fidelity simulation of the water flow of Hudu River. Calibration results indicate that the present model accurately reflects real-world conditions with small errors. The simulation model depicts the water flow dynamics during different periods, the relative height difference between water level and embankment, the artificial flood diversion blasting, and underwater scenarios. Parameter adjustments enable comparative analysis of different scenarios, offering visualization support for flood control decision-making.
large scene river virtual simulation / digital twin / UE5 engine / flood scenario preview / Hudu River
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According to the three－dimensional geographic information platform of water conservancy and hydropower engineering that stays in the client mode，the research adopts WebGL technology to build the three－dimensional geographic information platform of water conservancy and hydropower engineering．Based on the B/ S architecture，the platform integrates the open source 3d map engine of Cesium． The overall technical framework adopts a three－layer architecture，which is data layer，application support layer and presentation layer respectively．Cache download and slice technology are adopted to realize high precision integrated loading of terrain and orthophoto images．Through model format conversion，the BIM model and oblique photography model are transformed into 3Dtiles format and superimposed on topography to build real 3D scenes．The platform not only realizes 3D visualization of water conservancy and hydropower engineering，but also has practicalfunctions such as slope height analysis，BIM attribute information management and distance area quantity calculation．
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The impermeability of basin, allowable water depth and drainage modulus of polder are main parameters of basin flood simulation in the HEC-HMS (The Hydrologic Engineering Center’s Hydrologic Modeling System) model under polder flood control mode.The setting of these parameters has strong impact on the simulation results. Taking Qinhuai River Basin as research area, we constructed an HEC-HMS hydrological simulation model to analyze the influence of impermeability, allowable water depth and drainage modulus on flood peak and flood volume simulation results. Results revealed that with impermeability increasing from 20% to 70%, the flood volume and flood peak of river basin in polder flood control mode displayed consistent rising trend. When the allowable water depth of polder raise, the flood volume of the basin in the polder mode was decreasing, while the flood peak was increasing. Moreover, with the reduction of drainage modulus, the flood peak and flood volume of the basin were decreasing.
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