This Circular stipulates the assessment of the quality of hydrological data measured by non-automatic measuring devices, adjusted, and automatically. It includes evaluation criteria, scoring methods, result compilation, and reporting of assessment results. This Circular takes effect from December 29, 2025.
적용 범위
Organizations and individuals conducting activities to assess the quality of hydrological data at stations within the national meteorological and hydrological station network.
핵심 사항
- Assessing the quality of hydrological data measured by non-automatic measuring devices and adjusted.
- Assessing the quality of hydrological data measured by automatic measuring devices.
- Scoring, compiling results, and preparing reports on the assessment of hydrological data quality.
- Quality classification table for hydrological data.
- Effective date: December 29, 2025
🌐 이 문서의 사회적 영향
- Improving the quality of hydrological data
- Ensuring the accuracy and reliability of hydrological information
- Supporting forecasting and disaster prevention work
❓ 자주 묻는 질문
What does this Circular replace?
Circular No. 38/2016/TT-BTNMT dated December 15, 2016, issued by the Minister of Natural Resources and Environment, which stipulates technical guidelines for assessing the quality of hydrological data.
When does this Circular take effect?
This Circular takes effect from December 29, 2025
What must organizations and individuals who have been approved for tasks before this Circular takes effect do?
Continue to implement according to the Decisions approving tasks for the activity of assessing the quality of hydrological data at stations within the national meteorological and hydrological station network. In cases of adjustment after this Circular takes effect, comply with the new regulations.
전문
|
MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT |
SOCIALIST REPUBLIC OF VIET NAM |
|
Number: 65/2025/TT-BNNMT |
Hanoi, November 12, 2025 |
CIRCULAR
TECHNICAL REGULATIONS FOR EVALUATING THE QUALITY OF HYDROMETEOROLOGICAL DOCUMENTS
On the basis of Law on Meteorology and Hydrology dated November 23, 2015;
Decree No. Decree No. 38/2016/NĐ-CP dated May 15, 2016 of the Government detailing some provisions of the Law on Meteorology and Hydrology; Decree No. 48/2020/NĐ-CP dated April 15, 2020 of the Government amending and supplementing some articles of Decree No. Decree No. 38/2016/NĐ-CP dated May 15, 2016 of the Government detailing some provisions of Law on Meteorology and Hydrology;
Decree No. Decision No. 35/2025/NĐ-CP February 25, 2025 of the Government stipulating functions, tasks, powers, and organizational structure of the Ministry of Agriculture and Rural Development;
Pursuant to the proposal of the Director of the General Meteorological and Hydrological Service;
The Minister of Agriculture and Rural Development issues this Circular on technical regulations for evaluating the quality of hydrometeorological documents.
PART I
GENERAL PROVISIONS
Article 1. Scope of Regulation
This Circular stipulates technical regulations for evaluating the quality of hydrometeorological observation documents at hydrological stations within the national meteorological and hydrological station network.
Article 2. Applicability
This Circular applies to agencies, organizations, and individuals related to the activity of evaluating the quality of hydrometeorological observation documents at hydrological stations within the national meteorological and hydrological station network.
Article 3. Explanation of Terms
Strategic multi-purpose hydropower plant
1. Hydrometeorological documents are original logbooks recording information, observation data, corrections, self-recording diagrams, tables; reports on observation activities and carriers containing observation information and data at hydrological stations.
2. Checking and controlling documents involves examining the completeness, legality, physical condition, and form of documents; analyzing and comparing observation results, correction, and adjustment of documents with standards, specifications, and technical regulations to identify errors or omissions in the observation, correction, adjustment, data acquisition, and information processing processes; determining the volume and capacity of documents of hydrological stations.
3. Evaluating the quality of hydrometeorological documents is an activity that determines quality based on the results of checking and controlling documents.
4. Spatial consistency of data refers to the rationality of data of one or more hydrological factors at the observation location compared to the data of those hydrological factors observed on the same riverbank, watershed, or similar river system.
5. Temporal consistency of data refers to the rationality of one or more hydrological factors compared to the value of data at the same observation location during different time periods.
6. Consistency among observed hydrological factors refers to the examination of hydrological observation data between these factors at the same location and time.
7. Document errors are mistakes occurring in observation, calculation, correction, adjustment, and measurement equipment not meeting technical standards.
8. Benchmark score is the highest score defined for evaluating the quality of hydrometeorological documents.
9. Deduction points are the number of points deducted for missing or incorrect errors.
10. Quality score is the difference between the benchmark score and the total deduction points.
11. Non-automatic hydrological measuring instruments (including manual and semi-automatic measuring instruments) are technical means for performing measurements, transmitting, and disseminating information and data of hydrological factors carried out by humans.
12. Automatic hydrological measuring instruments are technical means including: measuring devices and tools; devices and tools with measurement functions; systems for automatically performing measurements of hydrological factors.
13. Hydrological stations using non-automatic measuring instruments are stations that observe and transmit all or part of the hydrological factors at the station directly by observers.
14. Hydrological stations using automatic measuring instruments are stations that observe and transmit all hydrological factors at the station completely automatically without human intervention.
Article 4. Principles for assessing the quality of hydrological documents
1. Compliance with current technical standards, regulations, and other relevant legal documents.
2. Ensuring accuracy, objectivity, completeness, and comprehensiveness in the assessment content.
3. For edited documents: only conduct the evaluation work when the observation documents meet the requirements.
Chapter II
TECHNICAL REGULATIONS FOR EVALUATING THE QUALITY OF HYDROMETEOROLOGICAL DOCUMENTS
Article 5. Hydrological Documents Subject to Assessment
1. Hydrological observation documents recorded by non-automatic measurement devices:
a) Observation result recording books for hydrological factors;
b) Statistical and calculation tables of observation results;
c) Daily self-recording charts;
d) Monthly and quarterly reports on station activities accompanied by inspection, maintenance, and periodic replacement records of measuring instruments; emergency fault inspection and repair records at the station; reports on special weather phenomena (if any);
đ) Data files.
2. Edited documents from hydrological observation documents recorded by non-automatic measurement devices:
a) Observation document review forms, observation periods;
b) Explanation of edited documents;
c) Observation and editing tables;
d) Correlation diagrams, drawings, process curves.
3. Hydrological observation documents recorded by automatic measurement devices:
a) Data files, including: station information: station code, station name, station address, location (coordinates); station data: observation or calculated data and units of measurement for hydrological factors at the station transmitted automatically daily;
b) Reports on the operation status of the automatic station network;
c) Inspection, maintenance, and periodic replacement records of measuring instruments; emergency fault inspection and repair records at the station according to technical regulations for the operation of automatic meteorological and hydrological stations.
Article 6. Content of Quality Assessment of Hydrological Documents
1. Hydrological observation documents recorded by non-automatic measurement devices:
a) Completeness of observation documents;
b) Physical condition and form of observation documents;
c) Structures and measurement devices;
d) Observation methods, procedures, and calibration of measurement devices;
đ) Calculation of data and selection of characteristic values, data entry procedures;
e) Reasonableness of data in space, time, and observed factors.
2. Edited documents from hydrological observation documents recorded by non-automatic measurement devices:
a) Completeness of edited documents;
b) Physical condition and form of edited documents;
c) Editing methods;
d) Calculations, determination of characteristic values, and accuracy of documents;
đ) Reasonableness of documents.
3. Hydrological observation documents recorded by automatic measurement devices:
a) Completeness of documents, including: completeness of submitted documents and automatic observation information and data from the station; continuity, timeliness, and accuracy of automatic observation information and data transmission from the station to the receiving agency;
b) Structure and type of automatic information and data;
c) Structures and measurement devices;
d) Calibration of measurement devices;
đ) Reasonableness of data in space, time, and observed factors.
Article 7. Methods for Assessing the Quality of Hydrological Documents
1. Checking and controlling hydrological documents.
2. Evaluating the quality of hydrological documents using a scoring method based on standard points, deduction points, and quality score indices to classify them as excellent, good, average, and poor. In which:
a) Standard points are set at 100 points, determined for each quality assessment category; the total deduction points shall not exceed the standard points within each assessment content;
b) Deduction points are calculated for each missing or incorrect item, determined based on the analysis and evaluation of document errors according to the provisions of Article 6 of this Circular, from the sources specified in Article 5 of this Circular. When evaluating the quality of a factor's observation data with errors resulting from chain calculations that do not significantly affect the overall quality of the document, deduction points are counted only once;
c) The quality score (QSC) of observation documents and edited documents is calculated by subtracting the total deduction points (ΣDP) from the standard points (SP);
d) The formula for calculating the quality score of observation documents and edited documents is as follows:
QSC = SP - ΣDP
đ) Reporting the results of the quality assessment of hydrological documents.
Article 8. Evaluation of Hydrological Document Quality
1. Check the quantity and specifications of hydrological documents in accordance with the provisions (details in Appendix I attached to this Circular).
2. Control the quality of hydrological documents in accordance with the provisions (details in Appendix II attached to this Circular).
3. Evaluate the quality of hydrological observation documents using non-automatic measurement instruments and adjusted compilation documents:
a) The standard points for each evaluation item of hydrological observation documents using non-automatic measurement instruments and adjusted compilation documents are allocated in Table 1 as follows:
Table 1:Allocation of standard points for each evaluation item of hydrological observation documents using non-automatic measurement instruments and adjusted compilation documents
|
Serial number |
Evaluation Content |
Standard Points |
|
1 |
Hydrological observation documents using non-automatic measurement instruments Completeness of observation documents |
100 |
|
a |
Physical condition and form of observation documents |
25 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Structures, measuring instruments |
5 |
|
of |
Methods, procedures for observation, calibration of measuring instruments |
20 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Calculation of data and selection of characteristic values, data entry process |
25 |
|
đ |
Reasonableness of data in space, time, and observed factors |
15 |
|
Average loan repayment period is 10 years; |
Adjusted compilation documents from hydrological observation documents using non-automatic measurement instruments |
10 |
|
2 |
Completeness of adjusted compilation documents |
100 |
|
a |
Physical condition and form of adjusted compilation documents |
25 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Adjustment methods |
5 |
|
of |
Calculation, determination of characteristic values and accuracy of documents |
30 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Reasonableness of documents |
20 |
|
đ |
b) Deduction points for evaluating the quality of hydrological observation documents using non-automatic measurement instruments and adjusted compilation documents are specified in Table 2 as follows: |
20 |
Deduction points for each missing or incorrect item in the quality evaluation of hydrological observation documents using non-automatic measurement instruments and adjusted compilation documents
Table 2: (corresponding to observed factors)
|
Serial number |
Evaluation Content |
(for each missing or incorrect item) |
|
I |
Daily observation result logs lacking address, signature, stamp of the station |
|
|
1 |
Physical condition and form of observation documents |
|
|
a |
Self-recorded daily/monthly/yearly charts lacking signature, stamp of the station |
0.5 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Monthly, quarterly reports on station activities; inspection, maintenance, replacement records of measuring instruments and special weather event reports (if applicable) lacking address, signature, stamp of the station |
0.5 |
|
of |
Missing one of the monthly, quarterly reports on station activities; inspection, maintenance, replacement records of measuring instruments, technical corridors and special weather event reports (if applicable). Content of reports and records not complete as prescribed |
0.5 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Observation log results for stations, lines, measurement points lacking or incomplete information: address, river name, station name, measurement time, observer, benchmark height, usage time of benchmark, date of height transfer, stake/water mark number, height |
1.0 |
|
đ |
Missing one required observation factor according to the prescribed observation factors for the type of hydrological station |
0.2 |
|
Average loan repayment period is 10 years; |
Missing data for each prescribed observation factor according to the observation regime of the hydrological station |
3.0 |
|
g |
Not observing water level when measuring flow rate, current velocity, and suspended sediment load |
0.5 |
|
h |
Not assessing, classifying flow rate and suspended sediment load documents |
Missing detailed measurement periods for flow rate and suspended sediment load as prescribed |
|
international |
Data file not sufficient as prescribed |
2.0 |
|
k |
No data file |
0.5 |
|
l |
Physical condition of documents: lost data, wrinkled, torn, blurred, bound incorrectly according to format and unable to review and evaluate; moldy for paper documents; storage media for observation data files (CDs, USB drives) damaged, warped, lost data, infected with viruses |
1.5 |
|
2 |
Structures, measuring instruments |
|
|
a |
Form of documents: erased, poorly written and difficult to read, incorrect meaningful digit extraction. Data file: incorrect information display and data format as prescribed |
0.5 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Structures, measuring instruments not meeting legal conditions for operation as stipulated in Circular No. |
0.3 |
|
3 |
Methods, procedures for observation, calibration of measuring instruments |
|
|
a |
13/2021/TTBTNMT dated August 2, 2021 by the Minister of Natural Resources and Environment regarding the establishment, relocation, dissolution of national meteorological and hydrological stations. Measuring instruments in the list requiring verification and calibration not undergoing verification and calibration or exceeding the verification period as stipulated in Circular No. 03/2024/TT-BKHCN dated April 15, 2024 by the Minister of Science and Technology amending and supplementing certain articles of Circular No. 23/2013/TT-BKHCN dated September 26, 2013 by the Minister of Science and Technology on metrology for Group 2 measuring instruments which has been amended and supplemented by Circular No. 07/2019/TT-BKHCN dated July 26, 2019 by the Minister of Science and Technology Not assessing, classifying documents |
Structures, measuring instruments severely damaged leading to inability to measure data or measured data does not accurately reflect flow changes at the measurement location |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Structures not technically correct and not severely damaged; installation of measuring instruments not meeting technical requirements |
Structures, measuring instruments severely damaged leading to inability to measure data or measured data does not accurately reflect flow changes at the measurement location |
|
of |
Maintenance and repair of structures, measuring instruments not conducted at the prescribed time, not ensuring technical standards causing data quality deviation; incorrect measurement of benchmark height, stake head height, zero point of water marks as prescribed |
1.0 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
No maintenance and repair of structures, measuring instruments |
0.5 |
|
đ |
Benchmark stability of structures, measuring instruments changed without correction. Stake head height and zero point of water marks deviated |
2.0 |
|
Average loan repayment period is 10 years; |
No auxiliary stakes when structures are damaged or water levels rise higher or fall lower than the measurement system |
1.0 |
|
g |
Measuring instruments deviate from technical specifications as prescribed by competent state authorities or units, organizations, individuals managing and using measuring instruments |
1.0 |
|
h |
Measuring instruments not listed in the mandatory verification and calibration instrument list but without origin and technical characteristics documentation meeting technical standards prescribed by competent state authorities |
1.0 |
|
international |
Accuracy of automatic water level recording devices: time on the device clock and water level value on the chart differ from actual values |
1.0 |
|
k |
Observation documents outside the measurement range according to the technical specifications of the measuring instrument |
1.0 |
|
l |
Violation of technical corridors of hydrological observation structures |
0.5 |
|
Granite, gabbro, decorative stone... |
Incorrect observation method |
0.5 |
|
4 |
Calculation of data and selection of characteristic values, data entry process |
|
|
a |
Incorrect monitoring method |
|
|
- |
Errors in reading water levels using staff gauges and tide gauges, not monitoring and checking simultaneously when changing staff/tide gauges, incorrect method for replacing and calculating water level recording diagrams |
0.5 |
|
- |
Incorrect position, readings of rainfall observation and water temperature |
0.5 |
|
- |
Arrangement of current meters to measure velocity across cross-sections, arrangement of velocity measurement points on current meters; arrangement of depth measurement cross-sections, arrangement of depth measurements over time and cross-section changes, arrangement of flow rate measurements according to water level stages, time, and flow characteristics, arrangement of tidal flow rate measurements, using cross-sections to calculate flow rates incorrectly |
2.0 |
|
- |
Placement of measuring instruments across cross-sections does not ensure representativeness compared to the river surface |
2.0 |
|
- |
Incorrect configuration settings for measuring equipment |
2.0 |
|
- |
Arrangement of water sample collection for suspended solids not following the variation in suspended solids concentration and tidal flow |
2.0 |
|
- |
Taking water samples at incorrect locations and times, not meeting technical requirements |
0.3 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Incorrect sequence of observations |
|
|
- |
Water levels using staff gauges and tide gauges, water levels from self-recording water level meters, flow rates, suspended solid flow rates |
0.5 |
|
- |
Water temperature, rainfall |
0.2 |
|
of |
Incorrect calibration of measuring instruments |
0.3 |
|
5 |
Calculation of data and selection of characteristic values, procedures for entering data Procedures for entering data |
|
|
a |
Incorrect calculation of values: water levels (hourly, daily average); depths; widths; areas; values of velocity, flow rates, suspended solids concentrations, suspended solid flow rates (by section, cross-section, hourly, daily, monthly, annually, tidal); representative suspended solids concentrations. Incorrect calculation of self-recording water level diagrams |
0.3 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Incorrect calculation of values: hourly water temperature; rainfall during periods, daily rainfall, daily average water temperature |
0.2 |
|
of |
Incorrect characteristic values, time of appearance of characteristic values |
1.0 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Incorrect entry and calculation of observational data in the data file |
0.5 |
|
đ |
Supplementing and correcting documents not in accordance with regulations |
0.5 |
|
6 |
Adjusted compilation documents from hydrological observation documents using non-automatic measurement instruments |
|
|
a |
Unreasonable data according to spatial distribution |
0.5 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Unreasonable data according to time |
0.5 |
|
of |
Unreasonable data according to observational factors |
0.5 |
|
II |
Completeness of adjusted compilation documents |
|
|
1 |
Physical condition and form of adjusted compilation documents |
|
|
a |
Observation report and correction form lacking signatures and stamps of the implementing observation and correction unit |
0.5 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Lack of observation report from the implementing observation and correction unit |
1.0 |
|
of |
Insufficient number of correction tables, charts, graphs, process lines, high-water mark and non-zero tide gauge point tables, explanatory notes for each hydrological factor correction |
3.0 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Insufficient data in explanatory notes for corrections, in correction tables and charts, in graphs and process lines |
0.5 |
|
2 |
Adjustment methods |
|
|
a |
Physical quality of documents: wrong type of paper; wrinkled; torn; dirty; yellowed, moldy; printing errors; color printing not showing sufficient colors, binding not conforming to specifications |
0.5 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Format of documents: erased, printing errors, incorrect meaningful digit extraction, format and order of arrangement of tables, charts, drawings, process lines, document sets not conforming to regulations |
0.3 |
|
3 |
Calculation, determination of characteristic values and accuracy of documents |
|
|
a |
Incorrect methods for calculating and compiling daily average water levels; hourly water levels; daily average water temperatures; daily rainfall; daily average flow rates; daily average suspended solid flow rates |
1.0 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Incorrect methods for compiling: daily high and low tide level statistics tables; highest high tide and lowest low tide level tables |
1.0 |
|
of |
Incorrect drawing of water level process lines; water temperature process lines; rainfall charts; flow rate process lines; suspended solid flow rate process lines; relationship charts; correlation lines |
1.0 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Incorrect determination of correlations |
5.0 |
|
đ |
Incorrect or inaccurate determination of correction methods (stabilization, flood cycle, sedimentation, erosion,...) |
5.0 |
|
Average loan repayment period is 10 years; |
Incorrect methods for constructing correlation lines: data selection for constructing correlations; correlating factors and correlation time; correlation type. Loose correlations |
3.0 |
|
g |
Failure to correctly implement contents: determining transition periods between correlation lines; using relationship lines to calculate flow rates and extend correlations; cutting tides, determining strong to weak and weak to strong tide transition periods (if applicable) for tidal-influenced river area correction materials; using relationship lines to calculate suspended solid flow rates and supplement, correct materials; determining representative suspended solids concentrations, suspended solid flow rates by tide |
3.0 |
|
h |
Failure to mark supplementary and corrected data values |
1.0 |
|
4 |
Reasonableness of documents |
|
|
a |
Incorrect observed data values for hydrological factors included in corrections |
0.5 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Incorrect or improper results of calculating average water levels (daily, monthly, annually); hourly flow rates; average flow rates (daily, monthly, annually, tidal); results of calculating average representative suspended solids concentrations, cross-sectional suspended solids concentrations, suspended solid flow rates (daily, monthly, annually, tidal); results of calculating total suspended solids amounts (monthly, annually, tidal) |
0.3 |
|
of |
Incorrect results of calculating correlation errors; results of calculating relationship line errors; results of calculating tidal flow duration, tide transition duration |
0.3 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Incorrect calculation of values: daily rainfall; daily average water temperature |
0.2 |
|
đ |
Incorrect selection of characteristic values, time of appearance of characteristic values of hydrological factors |
1.0 |
|
Average loan repayment period is 10 years; |
Supplementing and correcting documents not in accordance with regulations |
0.5 |
|
5 |
b) Deduction points for evaluating the quality of hydrological observation documents using non-automatic measurement instruments and adjusted compilation documents are specified in Table 2 as follows: |
|
|
a |
Unreasonable data according to spatial distribution |
2.0 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Unreasonable data according to time |
2.0 |
|
of |
Unreasonable data according to observational factors |
2.0 |
4. Evaluation of the quality of automatic measurement hydrological observation materials:
a) Standard points for evaluating the quality of automatic measurement hydrological observation materials are allocated in Table 3 as follows:
Table 3:Allocation of standard points for evaluating the quality of automatic measurement hydrological observation materials
|
Serial number |
Evaluation Content |
Standard Points |
|
1 |
Completeness of materials |
30 |
|
2 |
Structure, type of automatic data information |
5 |
|
3 |
Methods, procedures for observation, calibration of measuring instruments |
25 |
|
4 |
Calibration of measuring instruments |
25 |
|
5 |
Adjusted compilation documents from hydrological observation documents using non-automatic measurement instruments |
15 |
b) Deduction points for evaluating automatic measurement hydrological observation materials are specified in Table 4 as follows:
Table 4: Deduction points for each missing or incorrect item in the evaluation of the quality of automatic measurement hydrological observation materials
|
Serial number |
Evaluation Content |
(for each missing or incorrect item) |
|
1 |
Completeness of materials |
|
|
a |
Missing one required observation element according to station regulations |
Not evaluating, classifying the material of that element |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Monitoring regime, transmission and reception of information and data not continuous, intermittent: |
|
|
- |
From 1% to less than 5% of data |
2.0 |
|
- |
From 5% to less than 10% of data |
5.0 |
|
- |
From 10% to less than 20% of data |
10.0 |
|
- |
From 20% to 30% of data |
20.0 |
|
- |
Missing more than 30% of data |
Structures, measuring instruments severely damaged leading to inability to measure data or measured data does not accurately reflect flow changes at the measurement location |
|
of |
Quantity of transmitted information and data to receiving agencies does not match the quantity of information and data according to station regulations |
0.5 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
Transmission time of information and data to receiving agencies exceeds the stipulated transmission time from the station by more than 5 minutes |
0.5 |
|
đ |
Information and data from the station transmitted to receiving agencies are incomplete, untimely, and do not ensure accuracy |
2.0 |
|
Average loan repayment period is 10 years; |
Lack of technical documentation, technical file of the station, report on the operation status of measurement equipment, inspection records, maintenance, emergency repair records, high water level reporting |
3.0 |
|
2 |
Structure, type of automatic data information |
|
|
a |
Incorrect information structure, content of data, file data structure |
2.0 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Incorrect data format, file data format |
2.0 |
|
of |
Physical condition of the media carrying data files, damaged, moldy, warped CD; USB lost data, infected with virus for digital files |
0.5 |
|
For coal-fired thermal power plants where the enterprise holds 100% of the registered capital and uses 100% of its own capital to invest in the project approved by the competent authority, E is determined as 100%; |
The form of the document does not comply with standards, formats |
0.3 |
|
3 |
Methods, procedures for observation, calibration of measuring instruments |
|
|
a |
Project |
|
|
- |
The project does not meet the legal conditions for operation as prescribed in Circular No. 13/2021/TT-BTNMT dated August 2, 2021, issued by the Minister of Natural Resources and Environment regarding the establishment, relocation, and dissolution of national hydro-meteorological stations |
Structures, measuring instruments severely damaged leading to inability to measure data or measured data does not accurately reflect flow changes at the measurement location |
|
- |
The project is severely damaged, leading to inability to measure data or measured data does not accurately reflect the flow dynamics at the measurement location |
Structures, measuring instruments severely damaged leading to inability to measure data or measured data does not accurately reflect flow changes at the measurement location |
|
- |
Technical corridor of the measurement project is slightly violated |
0.4 |
|
- |
Maintenance of the project does not meet technical requirements |
3.0 |
|
- |
Project maintenance is not carried out according to the specified time |
2.0 |
|
- |
No maintenance of the project |
10.0 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Measuring Device |
|
|
- |
Measurement equipment is severely damaged, leading to inability to measure data or measured data does not accurately reflect the flow dynamics at the measurement location. Equipment installation does not meet technical requirements |
Structures, measuring instruments severely damaged leading to inability to measure data or measured data does not accurately reflect flow changes at the measurement location |
|
- |
Not calibrated or tested, or has exceeded calibration and testing period |
|
|
- |
Deviation from characteristic standards, technical parameters of hydrological measuring devices |
|
|
- |
Measurement equipment maintenance does not meet technical requirements |
3.0 |
|
- |
Measurement equipment maintenance is not carried out according to the specified time |
2.0 |
|
- |
No maintenance or preservation of measurement equipment |
5.0 |
|
4 |
Calibration of measuring instruments |
|
|
a |
Each incorrect measurement method for each observed element of the station |
1.0 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Incorrect correction: measurement equipment, height of the station |
0.5 |
|
5 |
Spatial and temporal rationality of the data and observed elements |
|
|
a |
Unreasonable data according to spatial distribution |
0.4 |
|
The Standing Office of the Council for International Cooperation on Non-Governmental Organizations (Vietnam Friendship Association) is the agency responsible for receiving registration dossiers, leading, and coordinating with member agencies of the Council to examine dossiers and return results of reviews of registration dossiers of foreign non-governmental organizations in Vietnam. |
Unreasonable data according to time |
0.2 |
|
of |
Unreasonable data according to observational factors |
0.4 |
5. Scoring, summarizing results, and preparing reports on the quality assessment of hydrological materials:
a) Prepare a report on the quality assessment results of hydrological materials measured by non-automatic measurement equipment according to the model prescribed in Appendix III attached to this Circular;
b) Prepare a report on the quality assessment results of corrected hydrological materials according to the model prescribed in Appendix IV attached to this Circular;
c) Prepare a report on the quality assessment results of hydrological materials measured by automatic measurement equipment according to the model prescribed in Appendix V attached to this Circular;
d) Monthly reports prescribed in points a and c of this clause shall be submitted to the unit as prescribed before the 28th day of the following month.
Article 9. Quality Assessment and Classification of Hydrological Materials
1. Quality Assessment of Hydrological Materials Measured by Non-Automatic Measurement Equipment and Corrected Materials
The quality assessment and classification of hydrological materials measured by non-automatic measurement equipment and corrected materials are stipulated in Table 5 as follows:
Table 5: Table for Assessing and Classifying the Quality of Hydrological Materials Measured by Non-Automatic Measurement Equipment and Corrected Materials
|
Serial number |
Quality Points |
Classification |
Evaluation |
|
1 |
From 90 to 100 |
Good |
Met requirements |
|
2 |
From 70 to less than 90 |
Fair |
|
|
3 |
From 50 to less than 70 |
Computer |
|
|
4 |
Less than 50 |
Poor |
Does not meet requirements |
2. Quality Assessment of Hydrological Materials Measured by Automatic Measurement Equipment
The quality assessment and classification of hydrological materials measured by automatic measurement equipment are stipulated in Table 6 as follows:
Table 6: Table for Assessing and Classifying the Quality of Hydrological Materials Measured by Automatic Measurement Equipment
|
Serial number |
Quality Points |
Classification |
Evaluation |
|
1 |
From 90 to 100 |
Good |
Met requirements |
|
2 |
From 70 to less than 90 |
Fair |
|
|
3 |
From 60 to less than 70 |
Computer |
|
|
4 |
Less than 60 |
Poor |
Does not meet requirements |
Chapter III
IMPLEMENTING PROVISIONS
Article 10. Effective Date
1. This Circular takes effect from December 29, 2025;
2. Circular No. 38/2016/TT-BTNMT dated December 15, 2016, issued by the Minister of Natural Resources and Environment on technical guidelines for assessing the quality of hydrological materials, shall cease to be effective from the date this Circular takes effect.
Article 11. Transitional Provisions
Organizations and individuals who have been approved for tasks related to the quality assessment of hydrological materials of stations within the national hydro-meteorological network before the date this Circular takes effect shall continue to implement according to the provisions of Circular No. 38/2016/TT-BTNMT dated December 15, 2016, issued by the Minister of Natural Resources and Environment on technical guidelines for assessing the quality of hydrological materials. In cases where adjustments are made according to tasks after this Circular takes effect, they must comply with the technical guidelines stipulated in this Circular.
Article 12. Responsibilities for Implementation
1. The Director of the Hydro-Meteorological Service is responsible for disseminating and supervising the implementation of this Circular.
2. Ministries, ministerial-level agencies, provincial People's Committees, and relevant agencies and organizations are responsible for implementing this Circular./.
|
Place of Receipt: |
DEPUTY MINISTER |
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