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River basin design flood inference method based on conceptual hydrological model

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

Active Publication Date: 2018-02-23
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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  • River basin design flood inference method based on conceptual hydrological model
  • River basin design flood inference method based on conceptual hydrological model
  • River basin design flood inference method 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 river basin design flood inference method based on a conceptual hydrological model. The method comprises the following steps: Step 1, collecting and processing dataof a typical stormwater process; Step 2, selecting and determining a conceptual hydrological model; Step 3, determining the applicability of the hydrological model in the study of the basin; Step 4, substituting the applicability to design the storm to obtain the design flood; and Step 5, comparing the instantaneous unit line method with the original design result of the project for referential evidence. According to the method provided by the present invention, experiential generalization in the original design flood calculation is improved, characteristics of the production and sink flow inthe basin are analyzed based on the theory of the rainfall runoff in the river basin, and based on the applicability of the hydrological model, the design flood is deduced from the physical mechanism;and the method improves the design flood theoretical system and is a new method for calculating the design flood that can be used for promotion 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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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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