Author(s): Mei Chao; Zhang Kehan; Liu Jiahong; Wangjia; Songtianxu; Li Yulong

Linked Author(s): Jiahong Liu

Keywords: Digital twin; Numerical modeling; Three-dimensional simulation; Urban waterlogging

Abstract: Urban governance globally faces the problem of urban waterlogging, which results in significant economic losses and casualties, arousing widespread concern for society as a whole. As a typical representative of information technology, digital twin technology plays an important role in various industries and is widely implemented in urban waterlogging prevention and control decision-making, that is, emergency management and decision support. To analyze urban waterlogging, this study considers the Maling River watershed, a highly urbanized watershed in Suqian City, China, for a case study. Data on urban waterlogging monitoring, elevation, land use, and drainage systems were collected. A numerical model of urban waterlogging was constructed by coupling hydrology with one- and two-dimensional hydrodynamic modules. A three-dimensional simulation base was then constructed, which included buildings, roads, green spaces, and water surfaces. Urban waterlogging under extreme rainstorm conditions was simulated using the constructed numerical model based on the Cesium platform. The combined numerical modeling results and urban three-dimensional simulation base was used to achieve three-dimensional visualization simulation and analysis of urban waterlogging processes. The results indicate that the simulation method constructed in this study could achieve inversion and three-dimensional visualization of historical waterlogging processes.

DOI: https://doi.org/10.3850/iahr-hic2483430201-485

Year: 2024