Coastal city multi-source flood numerical simulation method based on GIS grid operation

Abstract

The invention discloses a coastal city multi-source flood numerical simulation method based on GIS grid operation. The method is provided with a parameter setting module, a surface data input module,a hydrological multi-boundary condition input module, a flood numerical real-time simulation module and a visual output module. The method comprises the steps of setting simulation basic parameters inthe parameter setting module; inputting the basic geographic information, including topographic data, land types, soil types and pipe network data, of a research area into the earth surface data input module, wherein a multi-source flood sequence file input into the hydrological multi-boundary condition input module comprises three flood disaster types including rainstorm waterlogging, coast storm surge and river flood; adopting the visual output module for setting the format category of an output file; and starting an operation flood numerical value real-time simulation module, and displaying a multi-source flood numerical value simulation result in real time. The method is provided based on the GIS grid operation. The method simulates and predicts the disaster situation of coastal citymulti-source flood collision.

Description

technical field [0001] The invention relates to hydrology, meteorology, ocean and geographic information technologies, in particular to a numerical simulation method for multi-source floods in coastal cities based on GIS grid operations. Background technique [0002] Flood disaster is one of the most frequent and most serious natural disasters in the world. The research method of flood simulation has gradually shifted from qualitative and semi-quantitative analysis to quantitative research of numerical simulation and scenario analysis. A large number of theoretical methods and case analysis studies have been carried out on flood scenario simulation at home and abroad. In terms of research methods, they have experienced the development process from qualitative to quantitative, from empirical analysis to numerical simulation, and from static evaluation to dynamic simulation. The analysis of the risk of a single hazard-causing factor has seldom discussed the comprehensive effe...

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Problems solved by technology

In addition, coastal urban areas are threatened by multi-source floods from rainfall, rivers, and oceans. Traditional flood hydrodynamic numerical simulation techniques cannot simultaneously simulate the "multi-meeting" scenario of storm waterlogging, river floods, and ocean storm floods. However, based on GIS grid Computational flood simulation methods are capable of simultaneously integrating and simulating multi-source floods (multiple boundary conditions) on the underlying surface of coastal cities

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