Calculation method for calculating staged design flood based on staged design storm

A design flood and calculation method technology, applied in the direction of design optimization/simulation, climate change adaptation, special data processing applications, etc., can solve the problem that there is no mature method for the non-annual maximum rainstorm staged design flood calculation, and achieve the goal of filling the calculation gap Effect

Active Publication Date: 2022-05-27
BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] However, because a large number of areas lacking hydrological data do not have the data conditions for rate-determined production and confluence parameters, most of the few areas with rate-determined production and confluence parameters can only target the annual maximum rainstorm
Therefore, all kinds of rainstorm and flood calculation charts or hydrological calculation charts only give the parameters of flow yield and confluence corresponding to the annual maximum rainstorm, and there is no mature method for calculating the design flood of non-annual maximum rainstorm stages

Method used

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  • Calculation method for calculating staged design flood based on staged design storm
  • Calculation method for calculating staged design flood based on staged design storm
  • Calculation method for calculating staged design flood based on staged design storm

Examples

Experimental program
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Effect test

Embodiment

[0040] (1) Calculation or acquisition of design rainstorm value in stages

[0041] The design of rainstorms by stages can be calculated by using the statistical value of the maximum period of rainstorms in the current basin or adjacent watersheds. The time period used for the maximum rainstorm amount can be 1 hour, 6 hours, 24 hours, etc.; the rainstorm frequency curve can use Pearson III distribution (P-III), logarithmic Pearson distribution (LP-III), Kritz Various line types stipulated in the "Water Conservancy and Hydropower Engineering Design Flood Calculation Specifications", such as base-Minkari distribution (K-M), exponential gamma distribution, log-normal distribution, extreme value distribution, etc.; parameter estimation can use moment method, weight function method, Probabilistic weight moment method, line of fit method and other methods stipulated in the "Water Conservancy and Hydropower Engineering Design Flood Calculation Specifications".

[0042] (2) Calculation ...

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Abstract

The invention discloses a calculation method for estimating staged design flood based on staged design storm, which includes a method for matching the staged design storm frequency to the annual maximum design storm frequency and a method for determining staged design rainstorm production and confluence parameters. This calculation method obtains the staged design rainstorm value and the annual maximum design rainstorm value, and matches their frequency, and uses the annual maximum rainstorm and flood data to rate the production and confluence parameters or the frequency of the storm runoff calculation chart to synthesize the flow production and confluence parameters, which can be calculated The design flood is obtained to obtain the staged design flood.

Description

technical field [0001] The invention relates to a calculation method of staged design floods, in particular to a calculation method of staged design floods based on staged design rainstorms, and belongs to the technical field of hydrological calculation. Background technique [0002] Designing floods by stages is the basis for the construction design of water conservancy and hydropower projects. Generally speaking, the hydrological station data is used for the conventional phased design flood calculation, the maximum flow value is selected according to the phase required by the project, the phased design flood of the hydrological station is determined by the calculation of the flood frequency, and the phased design flood of the project site is determined by the area correction. For areas lacking hydrological data, the staged design flood is calculated using the staged rainstorm data of the project site, and then the staged design flood is derived from the staged design rains...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20Y02A10/40
Inventor 熊明
Owner BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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