GB/T 35230-2017 in English
VALIDSpecifications for surface meteorological observation―Evaporation
- Issued on:2017-12-29
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 35230-2017地面气象观测规范 蒸发》由TC507（全国气象仪器与观测方法标准化技术委员会）归口，主管部门为中国气象局。
Introduction
National Standard of the People's Republic of China GB/T 35230—2017 Ground Meteorological Observation Specification Evaporation Observation Technical Requirements and Implementation
1. Standard Overview
This standard specifies in detail the measurement method and technical requirements for evaporation in ground meteorological observation, and is applicable to a variety of meteorological observation scenarios. The standard mainly involves the installation, maintenance and data recording of equipment such as large evaporators, small evaporators and evaporation ponds.
2. Key Technical Requirements
| Technical Dimensions | Large Evaporator | Small Evaporator | Evaporation Pool | |
|---|---|---|---|---|
| Structural Features | - Made of white fiberglass reinforced plastic - Mouth area is 300 cm² | - Diameter 20 cm, height about 10 cm - Equipped with wire mesh to prevent birds and animals | - The diameter area should be 20 m² and the depth is 2 m - The inner and outer surfaces are painted white | |
| Installation Requirements | - Installed on the west side of the observation field - | - Close to the water circle and backfill with original soil | - Fixed on the cylinder in the observation field - The height of the mouth is about 70 cm from the ground | - Placed in a natural flat area - Away from the influence of sprinkler irrigation |
| Maintenance points | - Keep the water body clean and change water regularly - Check for leakage and level | - Clean daily and change water every 10 days during the freezing period | - Check for leakage regularly and trim the surrounding weeds |
3. Observation methods and data processing
Manual observation: Record the daily evaporation at 20:00 every day and calculate it by measuring the change of water surface height. The formula is: $$ E = H_1 + R - H_2 - H' $$ Where $E$ is the evaporation (mm), $H_1$ is the water level on the previous day, $R$ is the precipitation, $H_2$ is the water level at the time of measurement, and $H'$ is the overflow.
Automatic Observation: The system automatically calculates hourly and daily evaporation and stops observing during the freezing period.
4. Implementation Suggestions
Implementation Principles:
- Select appropriate instruments according to the needs of the observation station, give priority to the use of large evaporators, and switch to small evaporators during the freezing period
- Ensure that the installation location of the instrument meets the standard requirements and avoid interference from the surrounding environment
- Regularly maintain the equipment, keep the water clean, and check for leakage and level
- Install special rain gauges in rainy areas to reduce the impact of precipitation on evaporation
Data Management:
- Record daily observation data and properly preserve the observation book
- Use standard format for data analysis and sharing
- Combining with automation system to improve data collection efficiency
5. Future Outlook of Standards
With the advancement of meteorological observation technology, future standards will gradually introduce more automated and intelligent equipment, such as intelligent evaporation sensors and wireless data transmission systems. At the same time, the evaporation calculation method will be further optimized to improve data accuracy and application value.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 44395-2024 in English
Technical specification for reliability evaluation of wind data from lidar
2024-08-23 -
GB/T 38950-2020 in English
Cooling summer grades
2020-07-21 -
GB/T 31153-2014 in English
Climatic evaluation methods of precipitation resource in the catchment area of small hydropower stations
2014-09-03 -
GB/T 43237-2023 in English
Guidelines for public meteorological disaster prevention—Typhoon
2023-09-07 -
GB/T 33666-2017 in English
Identification method for El Ni●o/La Ni●a events
2017-05-12 -
GB/T 33679-2026 in English
Storage conditions for combustion agents and cooling agents used in weather modification
2026-02-27 -
GB/T 32752-2016 in English
Farmland waterlogging meteorological grade
2016-08-29 -
GB/T 42072-2022 in English
Climate livability index
2022-10-12 -
GB/T 34814-2017 in English
Methods of grassland meteorological monitoring and evaluation
2017-11-01 -
GB/T 27956-2011 in English
Medium-range weather forecast
2011-12-30
