Mountain torrent critical rainfall calculation method based on rainstorm characteristics

A calculation method and mountain torrent technology, applied in the fields of calculation, climate change adaptation, and data processing applications, can solve problems such as large changes in calculation results, lack of mountain torrent disaster data, and lack of river regulation projects, achieving high accuracy and saving manual calculations. The effect of time and cost

Active Publication Date: 2018-01-19
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, the lack of analytical data
my country has never carried out routine monitoring of mountain stream floods, landslides, debris flows and other disasters, lacks relevant data on mountain torrent disasters, and lacks the timing and critical correspondence between rainfall and mountain torrent disasters
Third, the critical water level of mountain streams and rivers is not representative enough
Shanxi rivers generally lack river channel improvement projects, the river section changes greatly along the course, and the critical water level also changes greatly along the course, so it is difficult to uniformly determine the critical rainfall of mountain torrents
Fourth, the existing calculation methods have high requirements
Due to the large number of warning points for mountain torrent disasters in my country, the lack of data in statistical induction methods, high technical requirements for hydrological and hydraulic methods, and backward technical means at the grassroots level, the task of determining the critical rainfall of mountain torrents is heavy, there are many uncertain factors, and the calculation results vary greatly, making it difficult to be accurate , Quickly determine the critical rainfall of flash floods

Method used

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  • Mountain torrent critical rainfall calculation method based on rainstorm characteristics
  • Mountain torrent critical rainfall calculation method based on rainstorm characteristics
  • Mountain torrent critical rainfall calculation method based on rainstorm characteristics

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Experimental program
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Effect test

Embodiment 1

[0037] A method for calculating critical rainfall based on torrential rain features torrents, said calculation method comprising the steps of:

[0038] Selection of geographical location: The selected location is Yudu County, Jiangxi Province, located in the east of Ganzhou City, with a total area of ​​2893 square kilometers and an average annual precipitation of 1507 mm. The landform in the territory is complex, with higher terrain in the south, east and north, gradually inclining to the central and west, forming a closed hilly and low-mountain landform dominated by low mountains, hills and basins, with large and small rivers collecting tribute water. Yudu County is located in the upper reaches of the Gongshui River, which is the source of the Ganjiang River. It gathers 4 major tributaries, including the Meijiang River, Chengjiang River, Lianshui River, and Xiaoxi River.

[0039] According to the mountain torrent survey and evaluation results of Ganzhou City Hydrology Bureau ...

Embodiment 2

[0088] Using the cloud computing platform for intelligent computing, first build a mountain torrent critical rainfall cloud computing platform, as follows:

[0089] Described cloud computing platform comprises data layer, application layer and display layer, and data layer provides the data used for computing for the module in application layer; Application layer provides calculation result to display layer; Display the data and support display device display.

[0090] The data layer includes a DEM database and a rainstorm statistical parameter database; the application layer includes a drainage basin boundary extraction module, a landform instantaneous unit line extraction module, a p-III frequency calculation module and a mountain torrent critical rainfall calculation module connected in sequence, and also includes a rainstorm statistical parameter calculation module; wherein, the watershed boundary extraction module and the landform instantaneous unit line extraction module...

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Abstract

The invention discloses a mountain torrent critical rainfall calculation method based on rainstorm characteristics. The method comprises the following steps: extracting the boundary of a selected mountain torrent area drainage basin, and determining the maximum convergence time D of the mountain torrent area drainage basin; according to the 'Chinese Rainstorm Statistic Parameter Atlas' and the longitude and latitude geographic information of the outlet section of the mountain torrent area, adopting a spatial distance interpolation method to extract the corresponding rainfall mean value x and the variation coefficient CV of different durations, and calculating the deviation coefficient according to the formula Cs = 3.5Cv; and then performing the calculation to obtain the designed once-in-five-year rainfall x in different durations; and calculating the mountain torrent critical rainfall once in five years according to the formula designed by the invention. The method is combined with thecloud computing platform technology, and the online calculation function of the mountain torrent critical rainfall of any mountain torrent early warning point is achieved, the manual calculation timeand cost are greatly saved, and the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for calculating critical rainfall of mountain torrents based on torrential rain characteristics. Background technique [0002] There are currently two definitions of critical rainfall indicators for mountain torrents: one is to define directly from rainfall. For mountain torrent disasters such as landslides, this rainfall is called the critical rainfall of the basin or region; the second is defined indirectly from the critical water level (flow) of mountain streams, that is, the cumulative rainfall that generates the critical water level (flow) at the target river section. [0003] The calculation method of flash flood critical rainfall usually adopts statistical induction method and hydrological hydraulic method. The statistical induction method is to directly establish the correlation relationship between the historical rainfall data and the moun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04
CPCY02A10/40Y02A90/10
Inventor 章四龙
Owner BEIJING NORMAL UNIVERSITY
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