Method for building flood loss models

Abstract

The invention discloses a method for building flood loss model. The method includes selecting curve tangent functions to be used as standard S-type functions and ultimately creating a flood loss function by means of translation and generalization processing. An x in the flood loss function is an independent variable and represents hazard intensity; an a in the flood loss function is a sensitivity coefficient; an S in the flood loss function is a maximum loss coefficient; an xD in the flood loss function is a horizontal-axis value corresponding to a turning point D in a loss curve. The method has the advantages that the physical quantity flood loss models with physical mechanisms are built, accordingly, the subjectivity due to the fact that loss is expressed in currency amounts can be avoided, and reliable and credible results can be obtained; flood loss can be quickly evaluated by the aid of regression equations of physical quantities and total loss, and accordingly the novel method can be used for evaluating the flood loss; parameters are determined on the basis of a process for measuring data and analyzing numerical values, accordingly, the key parameter determination objectivity can be guaranteed, and the method can be popularized in regions with similar characteristics and future flood loss prediction.

Description

technical field [0001] The invention belongs to the technical field of disaster prevention and control, and relates to a method for constructing a flood loss model. Background technique [0002] China is a country with frequent flood disasters, which cause huge losses every year, so it has become the focus of disaster prevention and mitigation. It is necessary to establish a simple and effective flood disaster loss assessment method to accurately assess disaster losses for flood control and disaster reduction and flood management. Disaster losses can generally be described by means of vulnerability curves, also known as vulnerability functions or loss functions, which represent the relationship curves between disasters of different intensities and losses. The establishment of disaster loss function is the key to disaster economic loss calculation and risk assessment. [0003] The loss rate relationship curve can be fitted based on historical flood disaster investigation da...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for constructing a physical quantity flood loss model, which solves the problems of lack of mechanism in the experience curve of flood loss rate in the past, poor popularization and applicability, and inaccurate expression of loss results in the form of monetary volume

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