Security risk assessment method and system for urban street tree

Abstract

The invention relates to a security risk assessment method and system for an urban street tree, wherein the method comprises the following steps: constructing a security risk assessment framework of an urban street tree, wherein the security risk assessment framework comprises a street tree hazard assessment system for the possibility of occurrence of a street tree collapse or fracture event and avalue damage assessment system for potential consequences of the street tree collapse or fracture event; according to a street tree hazard assessment system of the security risk assessment framework,obtaining a street tree hazard level by adopting an analytic hierarchy process; according to the value damage assessment system of the security risk assessment framework, adopting an analytic hierarchy process to obtain a regional risk level; constructing a judgment matrix of the street tree hazard level and the regional risk level; and according to the judgment matrix, obtaining a security riskassessment level table of the street tree by adopting a matrix judgment method. According to the invention, the accuracy of street tree risk prediction is improved, and the probability of loss causedby street tree accidents is reduced.

Description

technical field [0001] The invention relates to the field of engineering technology, in particular to a safety risk assessment method and system for urban street trees. Background technique [0002] Urban tree assessment research has been going on for decades, and the scope of research involves the assessment of tree health and potential safety risks. The earliest and most extensive studies to assess urban trees were conducted in the 1960s by the USDA Forest Service, Southwest Pacific Research Station. Paine developed a tree potential risk assessment form based on tree type, size, and tree structural damage. Based on it, Hickman conducted a safety assessment of 705 oak trees in California, and selected 11 evaluation indicators from four aspects of growth environment, tree structure, tree vigor, and hazard targets for on-site scoring to determine the total probability of risk. German arborist Mattheck et al. proposed a visual evaluation method for trees, clearly proposing t...

AI Technical Summary

Problems solved by technology

[0003] Street trees are installed on both sides of urban roads. As the backbone of the urban green space system, there are also hidden dangers to ecological safety. For example, trees are broken or uprooted to hurt pedestrians, damage roadside vehicles and houses, and break power lines. Serious losses were caused to production, life and property

And the potential safety hazards of street trees may also occur in different areas

[0004] At present, although various advanced technical instruments are continuously being developed and applied in the field of tree health diagnosis, their diagnostic characteristics have certain limitations. Most of them can only diagnose the local position of street trees, and cannot grasp the overall risk of street trees.

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