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Small watershed flood forecasting and early warning method and terminal

A flood forecasting and small watershed technology, applied in alarms, forecasting, instruments, etc., can solve problems such as numerous parameters, inability to describe the internal mechanism of natural phenomena, and lack of clear physical meaning of model parameters, to achieve the effect of overcoming limitations.

Pending Publication Date: 2021-11-19
SICHUANG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional lumped hydrological model simulates the runoff production and confluence of the watershed as a whole, and can only predict the process of flooding at the outlet section of the watershed, without considering the underlying surface of the watershed, the heterogeneity of rainfall distribution, and the hydrodynamic laws of the river network. For disaster prevention and mitigation in small watersheds, we should not only pay attention to the flood process at the outlet section, but also know the changes of hydrological elements in the river channel control section and the dynamic evolution of flood in the river basin, so as to judge the flood risk of villages along the river
Moreover, the model only reflects the appearance of flow generation and confluence in the watershed without a clear description of its physical mechanism. Most of the parameters of the model lack clear physical meaning and cannot describe the internal mechanism of natural phenomena, which limits its application range.
[0005] Representative distributed hydrological models mainly include: HEC-HMS model, SHE model funded by the European Community in 1986, SHETRAN model, TOPKAPI, etc. Although the distributed hydrological model takes into account the spatial variability of watershed characteristics and has physical meaning, but in the actual application process, the distributed hydrological model has strict requirements on hydrology, topography, landform and other data, and involves a large number of differential equations to solve, the model is complex and the calculation efficiency is low
For small watersheds, the distributed hydrological model has a complex structure and many parameters, and needs to rely on a large amount of historical data. However, most small watersheds in China generally lack monitoring stations, which limits the application of this method in watersheds that lack historical data.
[0006] That is to say, in view of the characteristics of small watersheds such as heavy rainfall, strong spatial heterogeneity of the underlying surface, short flow generation and confluence time, strong suddenness, strong destructive power, and lack of hydrological data, the above-mentioned flood forecasting methods are not practical due to various limitations. Very suitable for fine simulation of flood forecasting in small watersheds

Method used

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  • Small watershed flood forecasting and early warning method and terminal
  • Small watershed flood forecasting and early warning method and terminal
  • Small watershed flood forecasting and early warning method and terminal

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0074] Please refer to Figure 1 to Figure 8 , Embodiment 1 of the present invention is:

[0075] A small watershed flood forecasting and early warning method, comprising:

[0076] Step S1. Obtain historical hydrological data and basic watershed data, build a hydrological-hydrodynamic coupling initial model based on the MIKE series software and basic watershed data, calibrate the hydrological-hydrodynamic coupling initial model through historical hydrological data, and obtain the calibrated hydrological - hydrodynamic coupling model;

[0077] combine image 3 It can be seen that step S1 corresponds to figure 2 The production of the forecast scheme in , which specifically includes:

[0078] Step S11. Obtain historical hydrological data and basic watershed data, and divide the historical hydrological data into a calibration data set and a verification data set. The historical hydrological data include historical hydrological data and historical flood data;

[0079] Step S1...

Embodiment 2

[0133] Please refer to Figure 1 to Figure 8 , the second embodiment of the present invention is:

[0134] A small watershed flood forecasting and early warning method, combining Image 6 It can be seen that the step S3 of manual forecasting is also included, which is specifically:

[0135] Step S31, receiving the running time, end time and cumulative rainfall of the forecast period sent by the client;

[0136] Among them, the running time, end time and cumulative rainfall of the forecast period from the client are obtained through the interface.

[0137] Step S32, distributing the cumulative rainfall to each time point in the forecast period according to the typical rainfall time-space distribution curve, and obtaining the manual rainfall sequence files with equal time intervals;

[0138] Among them, the manual rainfall sequence file is also in JSON format.

[0139] Step S33, run the hydrological-hydrodynamic coupling model according to the running time, end time and manu...

Embodiment 3

[0147] Please refer to figure 2 with Figure 9 , Embodiment three of the present invention is:

[0148] A small watershed flood forecasting and early warning terminal, including a memory 3, a processor 2, and a computer program stored on the memory 3 and operable on the processor 2, when the processor 2 executes the computer program, the steps of the first or second embodiment above are realized .

[0149] Among them, if a small watershed flood forecasting and early warning terminal is used as a system, then as figure 2 As shown, it includes a forecasting scheme making module, data extraction and processing module, automatic forecasting module, manual forecasting module, data statistics module, and forecasting result extraction and presentation module, and has a water and rain database and a structure database for data storage and support. The corresponding functions of each module are as follows:

[0150] Forecast plan making module: according to the forecast task, rain...

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Abstract

The invention discloses a small watershed flood forecasting and early warning method and a terminal, and the method comprises the steps: obtaining historical hydrological data and watershed basic data, building a hydrological-hydrodynamic coupling initial model based on MIKE series software and the watershed basic data, and calibrating the hydrological-hydrodynamic coupling initial model through the historical hydrological data, obtaining a calibrated hydrological-hydrodynamic coupling model; acquiring grid weather forecast data and evaporation capacity data in a research basin and preheating period rainfall data of each rainfall station, obtaining forecast period rainfall data according to the grid weather forecast data, and importing the preheating period rainfall data, the evaporation capacity data and the forecast period rainfall data into a hydrological-hydrodynamic coupling model, and generating and displaying flood forecasting and early warning information. According to the method, real-time, convenient, accurate and high-forecast-period small watershed flood forecasting and early warning can be realized.

Description

technical field [0001] The invention relates to the technical field of non-engineering measures for natural disaster defense, in particular to a small watershed flood forecasting and early warning method and terminal. Background technique [0002] Flood forecasting is based on the objective law of flood formation, using historical, real-time, or future hydrological and meteorological data, to predict the changes of flood elements in a control section for a period of time in the future (called the forecast period). The predicted flood elements include water level Or flow hydrograph, peak flow or water level, peak time, etc. Flood forecasting is one of the most important non-engineering measures in the flood control system. It can provide important technical means for flood control decision-making and command, and provide strong support for mountain torrent forecast analysis and flood disaster assessment. [0003] After decades of development, the application of flood forecas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26G08B21/10
CPCG06Q10/04G06Q50/26G08B21/10Y02A10/40Y02A50/00
Inventor 秦根泉单森华林智伟黄少辉田慧陈翔苏晓林
Owner SICHUANG TECH CO LTD
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