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Regional flood early warning method

A flood and regional technology, used in forecasting, image data processing, 3D modeling, etc., can solve problems such as poor drainage, deviation, and insufficient flood warning accuracy.

Pending Publication Date: 2019-04-05
GUIZHOU EAST CENTURY SCI TECH CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a regional flood early warning method to solve the problem that the regional flood early warning in the prior art only considers the amount of rainstorm rainfall, and does not consider factors such as poor drainage. Large deviations lead to problems such as insufficient flood warning accuracy

Method used

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Embodiment Construction

[0013] A kind of regional flood early warning method, it comprises: 1, adopt unmanned aerial vehicle to possible waterlogging area, carry out image aerial photography, generate ground DEM (Digital Elevation Model) according to image;

[0014] 2. Calculate the runoff area of ​​flood-prone points and depressions based on DEM, and identify the main water-blocking structures;

[0015] 3. Based on historical disaster occurrence time, river water depth, submerged water depth, and rainfall runoff, study the relationship between river water level, rainfall and drainage capacity in this area, and establish a waterlogging model. The main input data of the model are river water level and rainfall, and the output is waterlogging depth and inundation range.

[0016] 4. Since the drainage capacity parameters of the model are calculated from historical disaster data, the actual drainage capacity of the current situation may not be consistent with the historical situation. Therefore, the mod...

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Abstract

The invention discloses a regional flood early warning method which comprises the following steps: step 1, carrying out image aerial photography on a waterlogging region by adopting an unmanned aerialvehicle, and generating a ground DEM digital elevation model according to the image; 2, according to the DEM, the runoff producing areas of the points prone to waterlogging and the concave land are calculated, and the water blocking building is recognized; Step 3, establishing a relation curve of the river water level, the rainfall and the drainage capacity according to the historical data information to form a waterlogging model; Wherein the input data of the model are river water level and rainfall, and the output data are waterlogging water depth and flood inundation range; 4, dynamicallydisplaying the real-time flood inundation range in a three-dimensional real-scene model according to the three-dimensional real-scene model generated by the aerial image; In the prior art, only rainstorm is considered in regional flood early warning, factors such as poor drainage and the like are not considered, and therefore the problems that large deviation exists in regional flood early warning, and flood early warning precision is not high are solved.

Description

technical field [0001] The invention belongs to flood early warning technology, in particular to a regional flood early warning method. Background technique: [0002] Flood early warning mainly relies on historical rainfall data information combined with current flood information and actual measured rainfall information combined with geographical environment and other comprehensive calculations to make predictions. However, because flood disasters are mainly manifested as waterlogging, the inducing factors mainly include heavy rain, rising river water levels and poor drainage. etc. However, in the prior art, only the amount of heavy rainfall is considered, and factors such as poor drainage are not considered. Therefore, there will be a large deviation in the regional flood warning, resulting in insufficient flood warning accuracy. Invention content: [0003] The technical problem to be solved by the present invention is to provide a regional flood early warning method to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06T17/00
CPCG06Q10/04G06Q10/0635G06T17/00Y02A10/40
Inventor 李胜郑强张宗旗杨正熙刘佳欣林湫
Owner GUIZHOU EAST CENTURY SCI TECH CO LTD
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