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A Flood Forecasting Method for Watersheds Without Runoff Data

A flood forecasting and watershed technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of subjective discrimination, low efficiency, difficulty in mass popularization of technology, low efficiency, etc., and achieves high model parameter determination efficiency, The effect of a comprehensive technical approach that avoids subjectivity

Active Publication Date: 2016-09-07
STATE GRID CORP OF CHINA +2
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Problems solved by technology

In fact, each parameter in the hydrological model represents a different physical meaning. Because each watershed has its own uniqueness, it is difficult to find a watershed with similar characteristics to all the parameters in the model, and the existing studies are only based on one or Several characteristic variables look for reference watersheds, but all parameters are transferred uniformly or use the same watersheds, which cannot reflect the uniqueness of parameters
[0007] Subjective discrimination and low efficiency: the existing technologies all use manual discrimination and processing to try to solve the problem of flood forecasting in areas without data. The technology is difficult to promote in large quantities, and it contains human subjectivity, which is inefficient

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  • A Flood Forecasting Method for Watersheds Without Runoff Data
  • A Flood Forecasting Method for Watersheds Without Runoff Data
  • A Flood Forecasting Method for Watersheds Without Runoff Data

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as figure 1 Shown, the flood forecasting method of the watershed without runoff data of the present invention comprises the following steps:

[0035] 1) Information related to watershed characteristics includes topography, land use, and soil feature information. Among them, land use and soil features mainly refer to the coverage rate of various vegetation and soil types, and the classification is relatively fine. For example, the land use coverage rate includes evergreen There are more than ten kinds of coniferous forests, evergreen broad-leaved forests, and grasslands. In fact, hydrological model parameters are mainly related to vegetation and soil by loose coupling. For example, many studies have shown that the average free water storage capacity SM of the watershed is related to the forest rate, and it will not be specific to ev...

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Abstract

The invention discloses a flood forecasting method for watersheds without runoff data. For completed watersheds with historical runoff data and better forecasting effects, the model parameters and watershed characteristic information after clustering processing are stored in a database in advance; When forecasting a watershed without runoff data, the characteristic information of the underlying surface in the watershed is first automatically clustered, and then the watersheds similar to each model parameter are found one by one in the large watershed where the watershed is located, and the model parameters of the similar watersheds are Carry out correlation analysis with the characteristic information determined in advance, and finally determine each parameter. Based on the accumulation of a large number of watershed forecasts, the present invention completes the automatic selection of similar watersheds without data forecasting, automatic correlation analysis and final determination of model parameters, which can effectively avoid human subjective judgment errors and improve efficiency. Lay the groundwork for regional forecasts.

Description

technical field [0001] The invention relates to a flood forecasting method for a watershed without runoff data, and belongs to the technical field of flood forecasting. Background technique [0002] Hydrological processes in nature are extremely complex and affected by many factors. Generally, generalized hydrological models are used for prediction. On the basis of , determine the hydrological model parameters of the current forecast basin. In most watersheds, the parameters of the hydrological model are calculated by simulating a large amount of historical runoff data (substituting information such as rainfall and evaporation into the model, and adjusting the parameters to make the calculated runoff process consistent with the actual situation); , the historical runoff data sequence is very short, which cannot meet the forecasting requirements; at the same time, due to human activities and other influences, the characteristics of runoff production and confluence in the bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 李春红王建平陈建谢小燕赵宇黄春雷姚峰
Owner STATE GRID CORP OF CHINA
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