Regional automatic rainfall station hourly rainfall data quality control system and method

Abstract

The present invention relates to a regional automatic rainfall station hourly rainfall data quality control system and method. The control system comprises a radar raw data pre-processing unit, an input unit, a quality flow main unit, an output unit, a destination file drawing unit and a destination file output parameter unit, wherein the radar raw data pre-processing unit is connected with the input unit; the input unit is connected with the quality flow main unit; the quality flow main unit comprises a rainfall estimation module, a matching module and a quality control module; and one end of the output unit is connected with the matching module while the other end is individually connected with the destination file drawing unit and the destination file output parameter unit. The control system provided by the present invention is simple and reasonable in structure design and stable and reliable in operation. According to the control method, a face state of the rainfall can be accurately captured by introducing radar files, thus to effectively help to judge uncertain identification of extreme rainfalls in a flood season.

Description

technical field [0001] The invention relates to the technical field of meteorological data quality control, in particular to a system and method for controlling the quality of hourly precipitation data of regional automatic rainfall stations. Background technique [0002] Automatic rainfall station data is an important basis for accurately reflecting real-time precipitation. Since 2004, about 30,000 automatic rainfall stations have been built in my country for operational observation. However, my country's automatic rainfall stations also have certain problems, such as: uneven distribution density, dense in the east and sparse in the west; some rainfall stations relocate according to needs, resulting in inaccurate geographical location information; rainfall measurement is greatly affected by the wind field, especially It is the tipping bucket rain gauge that has a large error in the observation value due to the rain loss caused by the tipping bucket in the case of heavy rain;...

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Problems solved by technology

In addition, the researchers also explored the quality control methods of historical data according to the needs. For example, using the similar distance relationship between the precipitation retrieved by radar and the precipitation distribution observed by ground stations, the application of radar data to automatic station precipitation was carried out. The experimental study of data quality control (Cong Fang et al., 2011), because the number of samples analyzed is only 480 complete radar body scan data (radar completes a volume scan every 6 minutes), it is not enough to objectively evaluate the method itself. The method is only suitable for the ideal analysis of continuous and complete radar observation data. It does not consider the lack of radar data and timeliness requirements that often occur in real-time business environments, and cannot meet the requirements of real-time business quality control applications for the time being.

[0005] At present, the real-time quality control results of rainfall data from automatic stations operated in China mainly provide three types of data quality indicators: "reliable", "suspicious", and "wrong". " may be correct, and "wrong" data may be correct, which makes it difficult for forecasters to extract and judge precipitation information

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