Sponge city water-logging degree evaluation method based on water-logging power impulse

Abstract

The invention provides a sponge city water-logging degree evaluation method based on water-logging power impulse. An index system which comprises instantaneous partial city water-logging indexes, comprehensive partial water-logging indexes, partial overall water-logging index standard values, and the like and is used for evaluating city water-logging degrees, and a specific calculation and analysis method of the system are established; with reference to analysis and display of engineering cases, the index system is capable of effectively reflecting time and space distribution characteristics of water logging; due to dimensionless quantity of the index values, a scientific method for expressing water-logging degrees is established, and the evaluation method can be relatively scientific; thewater-logging degrees of water-logging points of a city can be effectively reflected through the calculated comprehensive partial water-logging indexes, the overall water-logging degree of the city can be effectively evaluated through calculated partial overall water-logging design values, the overall reasonability of water-logging prevention design of LID (Low Impact Development) measures can bedescribed through average values of calculated overall partial water-logging index standard differences, and partial distribution nonuniformity of water-logging can be effectively reflected through calculated overall partial water-logging index standard differences and variant coefficients, so that reference is made for sponge measure design and evaluation on LID measures and the like; in addition, planning design reasonability can be evaluated by using the two indexes, so that the evaluation method can be relatively scientific and reasonable.

Description

technical field [0001] The invention relates to a waterlogging evaluation method, in particular to a sponge city waterlogging degree evaluation method. Background technique [0002] Waterlogging usually refers to the phenomenon of flooding disasters in cities caused by heavy rainfall or continuous rainfall exceeding the city's drainage capacity. Long-term waterlogging and waterlogging in general cities will affect urban traffic, urban facilities and the normal life of residents. At present, the degree of waterlogging is mainly described qualitatively, and there is no perfect and unified index system; the evaluation of the degree of waterlogging is basically based on the depth of waterlogging and the time of waterlogging (or the velocity of waterlogging) combined with qualitative comprehensive evaluation of experience, which is not yet scientific. Needs to be perfected. There are mainly two kinds of existing waterlogging assessment methods and ideas: historical disaster ass...

AI Technical Summary

Problems solved by technology

There are many and complicated reasons for waterlogging. At present, it is believed that the main cause of urban waterlogging is that urban planning and design do not fully take into account the influence of complex factors such as the overall urban topography and runoff system after heavy rainfall on waterlogging after rainfall. Indexes for evaluating waterlogging The system is not perfect, which brings difficulties to the optimal design of waterlogging prevention and control, and the evaluation method cannot reflect the characteristics of the whole process of waterlogging, which makes the design and the actual error

Images