Land-atmosphere coupling-based method and system for flood forecast of minor watersheds

A flood forecasting, gas coupling technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low flood forecast accuracy

Active Publication Date: 2012-01-11
DATANG SOFTWARE TECH
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Problems solved by technology

[0006] The invention provides a small watershed flood forecasting method and system based...

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  • Land-atmosphere coupling-based method and system for flood forecast of minor watersheds
  • Land-atmosphere coupling-based method and system for flood forecast of minor watersheds
  • Land-atmosphere coupling-based method and system for flood forecast of minor watersheds

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Embodiment Construction

[0071] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] The invention provides a small watershed flood forecasting method based on land-air coupling, which can predict the flood through the flow of runoff, so the flood in the small watershed can be predicted with high accuracy. And the present invention is realized by computer, and when mountain torrent breaks out, calculation is fast, can satisfy real-time requirement.

[0073] refer to figure 1 , a flow chart of a small watershed flood forecasting method based on land-atmosphere coupling according to an embodiment of the present invention is given.

[0074] Step 101, setting model parameters;

[0075] In the embodiment of the present invention, a hydrological model is used to predict runoff, and initialization is performed f...

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Abstract

The invention provides a land-atmosphere coupling-based method and a system for flood forecast of minor watersheds, which are used for solving the problem of low accuracy for the flood forecast of the minor watersheds. The method comprises the following steps: setting model parameters; inputting initial data; judging a runoff-generation manner through analyzing the initial data, calculating surface runoff if the runoff-generating manner is infiltration excess runoff, and taking the surface runoff as simulation runoff; calculating the infiltration amount of soil if the runoff-generating manner is saturation excess runoff, and calculating base runoff and subsurface runoff by using the soil infiltration amount; calculating to obtain the simulation runoff according to the base runoff and the subsurface runoff when the soil is unsaturated; and further calculating the surface runoff and calculating to obtain the simulation runoff according to the base runoff, the subsurface runoff and the surface runoff when the soil is saturated. The land-atmosphere coupling-based method and the system provided by the invention are suitable for calculating the simulation runoff of the minor watersheds, and the calculating result is more accurate through the combination of theory and practice, thus the land-atmosphere coupling-based method and the system are suitable for short-term or ultra-short-term runoff forecast and have high forecast accuracy.

Description

technical field [0001] The invention relates to hydrometeorology, in particular to a small watershed flood forecasting method and system based on land-atmosphere coupling. Background technique [0002] Hydrological forecast is a qualitative or quantitative forecast of the hydrological situation in a certain period of time in the future based on the previous and current hydrological and meteorological information. Hydrological forecasting is an important aspect of hydrology serving the economy and society, especially the forecasting of disastrous hydrological phenomena, and the short-term, medium-term and long-term forecasting of comprehensive utilization of large-scale water conservancy projects. Flood forecasting is a very important part of hydrological forecasting. There are many methods for flood forecasting. One of them is to forecast floods by predicting runoff. The currents of swamps and oceans. [0003] An important area in flood forecasting is that of small watersh...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 刘强张浩
Owner DATANG SOFTWARE TECH
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