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Downscaling product error calculation method for satellite observation rainfall data

A technology of rainfall data and satellite observation, applied in calculation, complex mathematical operations, data processing applications, etc., can solve the problems of increasing underreporting of secondary disasters of heavy rain, hidden dangers of prevention and control of secondary disasters of heavy rain, large errors, etc., and achieve data source Stable and reliable, fast and accurate calculation, the effect of improving accuracy and reliability

Active Publication Date: 2021-07-23
HOHAI UNIV
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Problems solved by technology

If this situation cannot be paid attention to in the process of error evaluation of downscaling products of satellite-observed rainfall data, it will often lead to too large errors brought by the down-scaled products of satellite-observed rainfall data. Provide timely and effective rainfall observation information in urban areas, thereby increasing the probability of under-reporting secondary disasters of heavy rains, and bringing certain hidden dangers to the prevention and control of secondary disasters of heavy rains

Method used

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  • Downscaling product error calculation method for satellite observation rainfall data
  • Downscaling product error calculation method for satellite observation rainfall data
  • Downscaling product error calculation method for satellite observation rainfall data

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0043] refer to figure 1 , the method provided by the present invention comprises the following steps:

[0044] Step 1: Based on the digital elevation data of the target watershed, divide the target watershed into multiple orthogonal grid units, and then go to step 2.

[0045] Step 2: Obtain each grid unit where the ground observation station is located in each grid unit, and then go to step 3.

[0046] Step 3: For each grid cell n where the ground observation site is located, n=1, 2...N, N is the total number of grid cells where each ground observation site is located, perform step A and step B, and then obtain the ground The spatial weight value of the urbanization index of all grid cells w...

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Abstract

The invention discloses a downscaling product error calculation method for satellite observation rainfall data. The method comprises the steps: dividing a target drainage basin into a plurality of grid units, and obtaining each grid unit where a ground observation station is located in each grid unit, calculating space weight values of urbanization indexes of all grid units where the ground observation station is located, errors between downscaling products of satellite observation rainfall data and ground station observation rainfall data, and time weight values of rainfall observed quantities collected by the ground observation station at all moments; and the error of the downscaling product of the rainfall data of the satellite observation target drainage basin in consideration of space distribution and time distribution is calculated. The method provided by the invention is simple, and the calculated downscaling product error result of the satellite observation rainfall data is high in accuracy and good in reliability.

Description

technical field [0001] The invention relates to the technical field of hydrology, in particular to a method for calculating errors of downscaled products of satellite observation rainfall data. Background technique [0002] As a new means of rainfall observation, satellite rainfall observation has the advantages of wide coverage and high degree of automation. However, the resolution of satellite rainfall observation data is usually not high, and it is necessary to combine the downscaling algorithm to improve its spatial resolution and generate downscaling products of satellite observation rainfall data to further improve its applicability. In recent years, the downscaling products of satellite observation rainfall data have been continuously enriched. How to select the appropriate downscaling products of satellite observation rainfall data according to the temporal and spatial characteristics of rainfall in the application area has become an important problem to be solved ur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06Q10/06
CPCG06F17/18G06Q10/06393
Inventor 晁丽君张珂王晟
Owner HOHAI UNIV
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