Urban flood assessment method based on urban toughness and urban drainage basin hydrological model

Abstract

The invention discloses an urban flood assessment method based on urban toughness and an urban watershed hydrological model. The method comprises the steps: acquiring satellite remote sensing data andurban meteorological data; calculating flood disaster occurrence areas, flood ponding areas and ponding depths of cities over the years; constructing an urban drainage basin hydrological framework model and an urban flood disaster response toughness framework model; calculating the toughness index of the city in response to flood disasters; carrying out contribution analysis on all elements of the city, and obtaining dimensions corresponding to the elements with the indexes lower than a first set value, wherein the lower the indexes of the elements are, the weaker the corresponding dimensionsare; calculating the drainage pressure and the ultimate drainage capacity of the urban drainage pipeline opening, and calculating the ponding risk of each area of the city; according to the water accumulation risk of each region of the city, obtaining the city region with the water accumulation risk greater than a second set value, wherein the higher the ponding risk is, the more easily the floodoccurs in the corresponding area; and evaluating the urban flood area and the urban weak dimension in the urban rainfall process.

Description

technical field [0001] The invention relates to an urban flood assessment method based on urban resilience and an urban watershed hydrological model. Background technique [0002] With the gradual deterioration of global climate change, the global temperature is gradually rising, resulting in frequent occurrence of extreme weather and climate disasters. At the same time, with the continuous advancement of my country's urbanization process, urban flood disasters are becoming more and more frequent. Therefore, it is necessary to accurately assess and identify the location of urban flood disasters, and to adapt to changes in climate conditions by strengthening the urban system from the perspective of urban planning and optimizing the hydrology of urban watersheds, thereby improving the ability of cities to respond to flood disasters. The sustainable development of cities has very important practical significance. [0003] At present, my country's cities are still unable to acc...

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Problems solved by technology

[0003] At present, my country's cities are still unable to accurately assess and identify urban flood-affected areas, and there is also a lack of methods to effectively improve the ability of my country's cities to deal with urban flood disasters

Although Chinese scholars have carried out a lot of research in the field of urban flood disast

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