Dynamic forecasting method for street tree city block wind disaster

Abstract

The invention discloses a dynamic forecasting method for a street tree city block wind disaster. The method comprises the following steps of: firstly, acquiring a wind speed acted on street trees to provide a necessary condition for street tree wind disaster damage analysis, constructing a fine forecasting technique of a block wind environment, and forecasting a horizontal wind speed acted on each street tree to provide a necessary condition for structural analysis; secondly, constructing a wind disaster damage model of the street trees, and implementing the damage analysis of the wind environment on the street trees based on the characteristic parameters of the street trees and the wind speed; and finally, forecasting the wind disaster damage level of the block street trees according to the damage level estimation of the street trees, and dynamically displaying, querying and analyzing the forecasting result so as to realize forecasting of city block street tree wind disaster loss. The established dynamic forecasting technology for the city block street tree wind disaster damage has guide effect on forecasting and early warning of the street tree wind disaster of an urban typical functional area, is expected to enhance the wind disaster dealing technology and capacity of the modern city, and provides a support for wind disaster defense and decision.

Description

technical field [0001] The invention relates to a method for dynamically forecasting wind damage loss of street trees in urban blocks. Background technique [0002] Against the background of continuous global warming, extreme weather and climate events have increased significantly, urban meteorological disasters have become increasingly prominent, and extreme weather events such as strong winds, heavy rains, and high temperatures have occurred frequently. Due to the large population and wealth gathered in big cities, lifeline engineering systems such as power supply, gas supply, telecommunications, and transportation are closely connected. Once a major natural disaster occurs, it will inevitably cause huge casualties and economic losses, and even affect adjacent areas and related areas. This phenomenon is called the amplification effect of social impact of urban disasters. Potential major disasters in Shanghai (excluding wars and major public security accidents) include ten...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a dynamic forecast method for wind damage to street trees in urban blocks in order to overcome the defect that there is no dynamic wind damage method for street trees in urban blocks in the prior art. This method belongs to two fields of atmospheric science and civil engineering. Interdisciplinary research, through the combination of fine wind field forecasting technology of urban blocks and street tree damage analysis technology, the dynamic prediction of wind damage loss of street trees in urban blocks is realized

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