A Method for Determining Flood Stage Time

A technology to determine the method and time, applied in data processing applications, instruments, calculations, etc., to avoid subjective arbitrariness and improve accuracy

Active Publication Date: 2022-07-22
BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the random nature of the above methods and the influence of the length of the statistical time period, the determination of the flood stage time is relatively arbitrary

Method used

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  • A Method for Determining Flood Stage Time
  • A Method for Determining Flood Stage Time
  • A Method for Determining Flood Stage Time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] (1) Point-drawn scatter plot of peaks

[0053] According to the needs, select the hydrological station that needs to be calculated by flood stages, and collect the largest flood peak in the past years or the flow data of several flood peaks ranked first in the annual flood peak magnitude of the hydrological station. , a scatterplot of peaks is drawn (see figure 1 ).

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

[0055] According to the flood peak scatter diagram, follow the chronological order of the flood peaks, connect the flood peak scatter points at the top and bottom respectively, and consider the smooth trend, and draw the upper and lower outer lines 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 lines

[0057] According to the upper and lower outer lines of the flood peak scatter points, the ordinate distance between t...

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Abstract

The invention provides a method for determining the time of flood stages, including point drawing of a flood peak scatter diagram, drawing of the upper and lower outer lines of the scatter points of the flood peak, determination of the overlapping section or the minimum distance section of the upper and lower outer lines, and calculation of the flood stage time; the method can fully consider the flood peak. The distribution, magnitude and transition point of occurrence time improve the accuracy of determining the flood time division point; this method can obtain flood stages by calculation, avoiding the subjective arbitrariness of time point determination in conventional analysis methods.

Description

technical field [0001] The invention relates to the technical field of hydrological computing, in particular to a method for determining the time of flood stages. Background technique [0002] Designing floods by stages is an important basis for the design, operation and dispatch of water conservancy and hydropower projects. my country's "Water Conservancy and Hydropower Engineering Design Flood Calculation Specifications" requires that flood stages should be carried out when there are obvious changes in the causes of floods and differences in magnitude. Flood staging is mainly based on seasonal characteristics, such as the difference between summer floods and autumn floods, the difference between plum rain and typhoon rain, etc. Due to the large randomness of annual flood seasonal changes, it is difficult to accurately staging. [0003] At this stage, the methods for determining the time of flood staging mainly include statistical analysis of weather situation transition t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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