Flood staging time determination method

A technology to determine the method and time, applied in data processing applications, instruments, calculations, etc., to achieve the effect of improving accuracy and avoiding subjective arbitrariness

Active Publication Date: 2020-01-31
BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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  • Application Information

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Problems solved by technology

Due to the random nature of the above methods and the influence of the length of the...

Method used

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  • Flood staging time determination method

Examples

Experimental program
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Embodiment

[0052] (1) Scatter plot of flood peak

[0053] Select the hydrological station that needs to calculate the flood in stages according to the demand, and collect the largest flood peak in the history of the hydrological station or the several flood peak flow data that ranks first in the magnitude of the annual flood peak. The time of the flood peak is the abscissa, and the size of the flood peak is the ordinate. , dot-plot the flood peak scatter diagram (see figure 1 ).

[0054] (2) Draw the upper and lower outer envelopes of the flood peak scatter points

[0055] According to the flood peak scatter diagram, follow the order of flood peak appearance time, respectively connect the top and bottom flood peak scatter points, and consider the smooth trend, draw the upper and lower outer envelopes of the flood peak scatter points (see figure 1 ).

[0056] (3) Determine the overlapping section or the minimum distance section of the upper and lower outer envelope lines

[0057] Acco...

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Abstract

The invention provides a flood staging time determination method. The flood staging time determination method comprises the steps of flood peak scatter diagram plotting, flood peak scatter upper and lower outsourcing line drawing, upper and lower outsourcing line overlapping section or minimum distance section determination and flood staging time calculation. According to the method, the distribution, magnitude and conversion point conditions of the flood peak occurrence time can be fully considered, and the flood time segmentation point determination accuracy is improved; according to the method, the flood stages can be obtained through calculation, and subjective randomness of time point determination of a conventional analysis method is avoided.

Description

technical field [0001] The invention relates to the technical field of hydrological calculation, in particular to a method for determining flood staging time. Background technique [0002] Flood design by stages is an important basis for the design, operation and dispatch of water conservancy and hydropower projects. my country's "Code for Design Flood Calculation of Water Conservancy and Hydropower Projects" requires that when there are obvious changes in flood causes and magnitude differences, flood stages should be carried out. Flood staging is mainly based on seasonal characteristics, such as summer floods and autumn floods, plum rains and typhoons, etc. Due to the large randomness of annual flood season changes, it is difficult to accurately stage them. [0003] At this stage, the methods for determining the time of flood stages mainly include statistical analysis of weather situation transition time points, visual interpretation of flood peak scatter diagrams, analysi...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06Y02A10/40
Inventor 熊明朱玲玲
Owner BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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