Method for topographic correction of precipitation areal rainfall

Abstract

The invention discloses a method for topographic correction of precipitation areal rainfall. The method relates to the technical field of atmospheric science, and comprises the steps of: S1, acquiring24-hour accumulated rainfall data in a T639 numerical forecasting mode; S2, matching the 24-hour accumulated rainfall data in the step S1 with a ground meteorological observation station; S3, establishing an areal rainfall calculation model by utilizing the 24-hour accumulated rainfall data, a model terrain and actual observation data; S4, marking longitude, latitude and real height of the groundmeteorological observation station, establishing real terrain data, and performing parameter optimization on the areal rainfall calculation model by utilizing the real terrain data; S5, training theoptimized areal rainfall calculation model by using a deep learning algorithm to obtain a precise areal rainfall calculation model; S6, and performing inversion on the rainfall of a designated regionby utilizing the precise areal rainfall calculation model to obtain the areal rainfall of the designated region. The method has the advantages that the method is simple, and the optimal areal rainfalldistribution condition of the designated region can be obtained.

Description

technical field

[0001] The invention relates to the technical field of atmospheric science, and in particular to a method for topographically correcting precipitation surface rainfall. Background technique

[0002] Precipitation is the process of phase change of water in the atmosphere, water vapor condenses into rain and snow, etc. From the conditions of precipitation formation, it can be seen that in addition to atmospheric circulation, the vertical distribution of precipitation is greatly affected by geographical environment. Studies have shown that there is a significant correlation between the total amount of precipitation and the height of the terrain. The precipitation usually increases with the increase of the terrain height. The study also pointed out that the precipitation has a significant relationship with the slope aspect. The precipitation on the leeward slope is less, and the precipitation on the windward slope is higher. In addition, the rainfall also depends...

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