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Medium and small river basin geological disaster and flood early warning method based on critical rainfall

A technology for small and medium-sized watersheds and geological disasters. It is applied in the direction of prediction, complex mathematical operations, and instruments. It can solve the problems of economic losses of the masses, the inability to improve the accuracy of early warning, and the inability to predict the height of floods. Practical application value, good forecast effect

Inactive Publication Date: 2021-12-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a geological disaster and flood early warning method for small and medium-sized watersheds based on critical rainfall, so as to solve the problem that the current small and medium-sized watersheds in the above-mentioned background technology often cannot timely The height of the flood is predicted, and the accuracy of the results obtained by the general flood early warning method is relatively limited, which cannot improve the accuracy of the early warning, and often brings huge economic losses to the masses.

Method used

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  • Medium and small river basin geological disaster and flood early warning method based on critical rainfall
  • Medium and small river basin geological disaster and flood early warning method based on critical rainfall
  • Medium and small river basin geological disaster and flood early warning method based on critical rainfall

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Effect test

Embodiment 1

[0034] The geological disaster and flood early warning method for small and medium watersheds based on critical rainfall includes the following steps:

[0035] Step 1: Calculation of area rainfall: The methods usually used are the arithmetic mean method and the Thiessen polygon method. Here, the Thiessen polygon method is used to first calculate the periodical rainfall of each station in the watershed, and then according to the weight of the watershed area occupied by each rainfall station , using the weighting method to superimpose the rainfall of each rainfall station in the basin;

[0036] Step 2: Calculation of soil water saturation: First, divide the watershed into several units according to the characteristics of precipitation and the underlying surface, then calculate the flow generation and confluence for each unit to obtain the outflow process of the unit watershed, and finally, By calculating it to the outlet of the watershed and superimposing it, the outflow process...

Embodiment 2

[0050] The geological disaster and flood early warning method for small and medium watersheds based on critical rainfall includes the following steps:

[0051] Step 1: Calculation of area rainfall: The methods usually used are the arithmetic mean method and the Thiessen polygon method. Here, the Thiessen polygon method is used to first calculate the periodical rainfall of each station in the watershed, and then according to the weight of the watershed area occupied by each rainfall station , using the weighting method to superimpose the rainfall of each rainfall station in the basin;

[0052] Step 2: Calculation of soil water saturation: First, divide the watershed into several units according to the characteristics of precipitation and the underlying surface, then calculate the flow generation and confluence for each unit to obtain the outflow process of the unit watershed, and finally, By calculating it to the outlet of the watershed and superimposing it, the outflow process...

Embodiment 3

[0066] The geological disaster and flood early warning method for small and medium watersheds based on critical rainfall includes the following steps:

[0067] Step 1: Calculation of area rainfall: The methods usually used are the arithmetic mean method and the Thiessen polygon method. Here, the Thiessen polygon method is used to first calculate the periodical rainfall of each station in the watershed, and then according to the weight of the watershed area occupied by each rainfall station , using the weighting method to superimpose the rainfall of each rainfall station in the basin;

[0068] Step 2: Calculation of soil water saturation: First, divide the watershed into several units according to the characteristics of precipitation and the underlying surface, then calculate the flow generation and confluence for each unit to obtain the outflow process of the unit watershed, and finally, By calculating it to the outlet of the watershed and superimposing it, the outflow process...

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Abstract

The invention discloses a medium and small river basin geological disaster and flood early warning method based on critical rainfall. The method comprises the following steps: step 1, calculation of area rainfall: generally adopting an arithmetic mean method and a Thiessen polygon method. The Thiessen polygon method firstly calculates time period rainfall of each station of a river basin; and then, according to the weight of the area of the drainage basin occupied by each rainfall station, superposes the time period rainfall of each rainfall station in the drainage basin by adopting a weighting method. The method has indexes which are easy to distinguish, can accurately capture geological disaster events caused by rainstorm, heavy rain and the like in small and medium watershed areas, has good forecasting effect, has high practical application value and is worthy of popularization, has important guiding significance for currently developed hydrological monitoring and early warning of flood-prone areas of medium and small rivers and national mountain torrent disaster prevention and control pilot work, and effectively avoids the problem that the height of flood cannot be predicted in time when the existing medium and small river basins encounter flood seasons.

Description

technical field [0001] The invention belongs to the technical field of geological disaster and flood early warning, and in particular relates to a method for early warning of geological disaster and flood in small and medium watersheds based on critical rainfall. Background technique [0002] Geological disasters refer to geological processes or geological phenomena that are formed under the action of natural or human factors and cause losses to human life and property and damage to the environment. The distribution of geological disasters in time and space changes, which is not only restricted by the natural environment, but also related to human activities, and is often the result of the interaction between humans and nature. [0003] Flash floods are sudden floods caused by heavy rainfall in small and medium-sized watersheds in mountainous areas. They are sudden and extremely destructive, threatening human life and property safety. There are many rivers in our country, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06F17/18G06Q50/26
CPCG06Q10/04G06F17/18G06Q50/26Y02A10/40
Inventor 张家明陈茂龙郧铠邱培城
Owner KUNMING UNIV OF SCI & TECH
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