Study on the Deduction of Flood Situation in Yangtze River Basin Based on Virtual Earth

Abstract

Flood disaster is one of the natural disasters with high frequency and wide range of harm in the world. The loss caused by flood can be effectively eliminated or reduced through the rational utilization of water conservancy projects for scientific dispatching. The occurrence, development and dispatching of flood is a dynamic process, and the visualization of flood control situation is an important means to study the internal change law of flood disaster. Based on the actual requirements of large-scale flood dispatching and flood deduction in the basin, this paper develops a 3D virtual earth-ark platform (3DGIS-Ark) and constructs a 3D visualization system architecture of flood control situation deduction, aiming at the characteristics of large data volume, multi-dimensional multi-scale and dynamic simulation in the basin. Combined with the operational characteristics of flood deduction, the paper focuses on the seamless integration of massive data and 3D roaming, 3D flood control situation deduction and disaster loss estimation. The system software has been successfully applied to the flood control situation of the Yangtze river basin, giving full play to the advantages of 3DGIS analysis and 3D display.