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GB/T 34818-2017: Computing methods of field water budget
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Computing methods of field water budget
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GB/T 34818-2017
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Basic data | Standard ID | GB/T 34818-2017 (GB/T34818-2017) | | Description (Translated English) | Computing methods of field water budget | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A47 | | Classification of International Standard | 07.060 | | Word Count Estimation | 10,113 | | Date of Issue | 2017-11-01 | | Date of Implementation | 2018-05-01 | | Regulation (derived from) | National Standard Announcement 2017 No. 29 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 34818-2017: Computing methods of field water budget---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Computing methods of field water budget
ICS 07.060
A47
National Standards of People's Republic of China
Calculation method of farmland water profit and loss
Posted.2017-11-01
2018-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by China Meteorological Administration.
This standard by the National Agricultural Meteorology Standardization Technical Committee (SAC/TC539) centralized.
This standard drafting unit. Chinese Academy of Meteorological Sciences, Chinese Academy of Agricultural Sciences Institute of Agricultural Resources and Regional Planning, China Water conservancy
Electric Science Institute.
The main drafters of this standard.Huo Zhiguo, Li Mao Song, Li Jiusheng, Xiaojing Jing, Mao Fei, Russia Hao, Wang Li, Zhang Lei, Yu Caixia, Wang Chunyan.
Introduction
The amount of farmland water surplus is an important basis for assessing the status of farmland soil water balance and for rational management of farmland water management. As a result of farming
It is very difficult to measure the partial factors of soil moisture budget in soil directly. In practice, the profit and loss of cropland water are still calculated and obtained.
In order to regulate the method of calculating the amount of profit and loss of farmland water so as to make it have space and time comparability, this standard is specially formulated.
Calculation method of farmland water profit and loss
1 Scope
This standard specifies the calculation method of farmland water profit and loss.
This standard applies to the calculation of farmland water profit and loss.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Wheat drought disaster rating
Technical guideline for determination of irrigation water utilization rate
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Farmland water profit and loss fieldwaterbudget
Within a certain period of time, the depth of the soil in the root zone of the crop gets the difference with the lost moisture.
Note. The unit is millimeter (mm).
3.2
Effective precipitation in farmland effectiveprecipitationinfield
After a period of farmland of natural precipitation by plant retention, surface runoff and deep leakage, the actual replacement of a certain depth of soil in the net
Water volume.
Note. The unit is millimeter (mm).
3.3
Crop water demand
Under normal fertility and optimal water and fertilizer conditions, plant transpiration, transpiration in the whole growing season (or a certain growing stage) and
The sum of the amount of water that makes up the plant.
Note. The unit is millimeter (mm).
3.4
Effective irrigation area effectiveirrigationamountinfield
Irrigation water available for crop use.
Note. The unit is millimeter (mm).
4 calculation method
4.1 Farmland water profit and loss calculation
The formula for calculating the profit and loss of farmland water is shown in formula (1).
ΔB = W Pe I NE (1)
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