Graded flood early warning method based on cesium model

Abstract

The invention provides a flood grading early warning method based on a cesium model. The flood grading early warning method comprises the following steps: establishing a simulation scene model in cesium software; calculating to obtain an actual river range and a flow function of the river; calculating to obtain the position of a connection section required for constructing the river surface; calculating to obtain a coordinate-based water level elevation of each section point position at a fixed moment by using a flood routing model; performing limited triangle division on the connection section to form a three-dimensional grid curved surface; simulating the time and the flow direction of the flood by using a dynamic texture mapping method; flood drawing; and performing graded early warning on the building. By adopting the technical scheme of the invention, the flood is efficiently and accurately simulated through a computer, the semi-Lagrange implicit integral method is applied, the volume conservation and momentum conservation laws are introduced, and the adaptive grid surface subdivision technology and the texture tiling technology are introduced, so that the flood disaster assessment and early warning model is constructed, and the flood disaster assessment and early warning efficiency is improved. The method is of great significance in restraining flood spreading and protecting important buildings.

Description

technical field [0001] The invention belongs to the technical field of flood scene simulation, and in particular relates to a flood classification early warning method based on a cesium model. Background technique [0002] Flood is a natural phenomenon in which the hydrological environment such as rivers, lakes, and oceans rise above the normal water level. Flood disasters in my country are both universal and regional in space; in time, they show disordered instability, and orderly rhythm and periodicity. A large number of studies have shown that flood disasters have complex characteristics such as inhomogeneity and difference, diversity, randomness and predictability, mutation and regularity. It is of great significance to the research and simulation of floods. A mature and complete simulation system can provide flood warnings to ordinary people, improve their awareness of flood prevention, and can also provide a reliable reference for decision makers to make decisions, wh...

AI Technical Summary

Problems solved by technology

The disadvantage lies in the lack of relatively complete visualization and interactive modules, which cannot provide some guidance for decision makers in real-time decision-making

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