A Flood Calculation Method for Watershed Design Based on Conceptual Hydrological Model

A hydrological model and flood design technology, which is applied in the field of watershed design flood estimation based on a conceptual hydrological model, can solve the problems of distortion of calculation results and inability to reflect the real situation of floods, and achieve the effect of improving accuracy and perfecting the theoretical system.

Active Publication Date: 2021-07-23
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0004] The present invention designs a watershed design flood calculation method based on a conceptual hydrological model. The technical problem it solves is the limitation that the current design flood calculation method based on subjective experience leads to distortion of calculation results and cannot reflect the real situation of floods

Method used

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  • A Flood Calculation Method for Watershed Design Based on Conceptual Hydrological Model
  • A Flood Calculation Method for Watershed Design Based on Conceptual Hydrological Model
  • A Flood Calculation Method for Watershed Design Based on Conceptual Hydrological Model

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Embodiment

[0053] Embodiment: select a watershed, and adopt the method provided by the present invention to simulate the design flood process once in a hundred years, specifically comprising the following steps:

[0054] Step 1. Select the daily rainfall and time-period rainfall data and the flow data from 1980 to 2012 in a certain watershed. The evaporation data is the evaporation data from 1980 to 2012 from the evaporation stations in the watershed, and the time period is 2 hours; Downstream, before the actual flood simulation, the initial flow of the reservoir was restored according to Formula 1 and Formula 2, and a total of 16 flood events with large flood volume and good continuity were selected as calibration and verification data for the hydrological model. Due to the small area of ​​the watershed and limited historical data, the flood of the survey stations in the watershed has large errors in classification according to the return period. image 3 According to the classification...

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Abstract

The present invention relates to a method for deriving watershed design flood based on a conceptual hydrological model, comprising the following steps: Step 1, data collection and processing of typical rain and flood processes; Step 2, selecting and calibrating a conceptual hydrological model; Step 3, Judging the applicability of the hydrological model in the research basin; step 4, substituting the design rainstorm to obtain the design flood; step 5, comparing the instantaneous unit line method and the original design results of the project for reference. The present invention improves the empirical generalization in the calculation of the original design flood, starts from the basin rainfall and runoff theory, analyzes the flow yield and confluence characteristics of the basin, and deduces the design flood from the physical mechanism based on the applicability of the hydrological model. This method perfects the theoretical system of design flood and is a new method for calculating design flood that can be used for popularization and application.

Description

technical field [0001] The invention relates to the technical field of flood risk management, in particular to a flood estimation method for watershed design based on a conceptual hydrological model. Background technique [0002] Except for large watersheds or typical hydrological stations, the flood forecasting process in general watersheds and hydrological stations in my country still stays in the method of constructing the correlation relationship between rainfall and runoff. Correspondingly, there are relatively few theoretical achievements in designing floods. The reasoning formula method for small watersheds and the instantaneous unit line method with better universality. However, these two methods are only based on the statistical relationship of historical rainfall-runoff data, and have a certain degree of subjectivity in the derivation process of design floods. With the acceleration of the modernization process of water conservancy, the acquisition of water regime i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06
CPCG06F30/28G06F2113/08Y02A10/40
Inventor 刘佳李传哲王维严登华王洋田济扬于福亮邱庆泰焦裕飞刘昱辰
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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