Procedure for Collecting and Verifying Rainfall Data in Hydrological Work

Process of collecting and verifying rain measurement data in hydrometeorological work (Illustrative image)

Article 22 of the Economic-Technical Norms for Hydrometeorological Documentation Work promulgated together with Circular 39/2013/TT-BTNMT provides regulations on the collection and verification of rain measurement data in hydrometeorological documentation work as follows:

Regarding data collection:

* Preparation work:

- Review the assigned tasks of the network of stations managed by the regional meteorological stations, including: Measurement indicators (measurement factors), equipment, machinery of each station as a basis for cross-checking with the data sent by the stations;

- Assign personnel to receive the data, remind the stations to submit data on time according to the current regulations.

* Data collection:

- Submission procedures:

- For data received directly: The data submission summary must be confirmed by the regional hydrometeorological station. Summarize the submitted data and create a handover record according to the Regulations on Hydrometeorological Data Archiving.- For data sent by post: Identify the postmark from the postal service sending the data; inventory the data and compare it with the summary prepared by the regional hydrometeorological station, if errors are detected, notify the station immediately for prompt supplementation; confirm on the data receipt record and send it back to the sending unit.

- Legal status check: Comments and signature of the director of the regional hydrometeorological station (seal included).

- Volume check of data: Based on the assigned task regarding measurement indicators (measurement factors), check the monthly report against the volume of data, and identify reasons for any shortages.

Regarding data verification:

- Check the physical condition of the data;- Verify the implementation process according to regulations;- Check various reports;- Ensure consistency between weather phenomena and types and amounts of precipitation;- Verify the reasonableness of the data on the graph and the weather phenomena;- Check calculation steps, and select extreme values according to factors in each report;- Annually (at the beginning of the year) collect and check the original records (SKT-5) of the previous year according to the above procedure.

Regarding evaluation, quality classification, and data transfer:

- Quality evaluation: After reevaluation, grade the quality of the data; combine with other activities (works, measuring equipment, implementation procedures, regulations, etc.) to evaluate the quality of basic rain measurement investigation for each station and the entire network of stations.- Report results: Report the quality results of basic rain measurement investigation of each regional station to the National Center for Hydrometeorology and send to relevant agencies and units.- Data transfer: After reevaluation and quality assessment of the basic investigation, all data is sent to the Center for Hydrometeorological Documentation for storage and exploitation according to current regulations.

For more details, see Circular 39/2013/TT-BTNMT, effective from December 15, 2013.

Le Vy

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