GB/T 42073-2022Climate risk index—Drought (English PDF)
气候风险指数 干旱
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 14, 2022
Implementation date
February 1, 2023
Scope
GB/T 42073-2022 is the English-translated version of 气候风险指数 干旱.
GB/T 42073-2022 is the Chinese national method for expressing drought as a climate risk index. It describes the data collection and the calculation method, and specifies the requirements for classifying drought climate risk levels, with normative appendices on the calculation of the drought risk factors and on the percentile method.
Clause 3 supplies the vocabulary it works with: drought, the persistent water shortage that it notes is usually divided into meteorological, hydrological, agricultural and socio-economic drought; meteorological drought and the meteorological drought index, both taken from GB/T 20481-2017, which it quotes; and drought intensity, divided into mild, moderate, severe and extreme.
Clause 1 applies the document to drought climate risk assessment and the related services. Issued on 14 October 2022, it has applied since 1 February 2023.
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Document preview — GB/T 42073-2022
National Standard of the People's Republic of China
- ICS
- 07.060
- Classification
- A 47
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Data collection
- 5 Calculation method
- 6 Risk classification
- Appendix A (normative) Drought Risk Factor Calculation Method
- Appendix B (normative) Percentile Method
- Reference
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.
1 Scope
This document describes the data collection and calculation methods of the arid climate risk index, and specifies the requirements for the classification of arid climate risk levels.
This document applies to dry climate risk assessments and services.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.
GB/T 20481-2017 Meteorological Drought Grade
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Drought
Persistent water shortages due to imbalances in water revenue and expenditure or supply and demand.
Note: Usually divided into four categories. meteorological drought, hydrological drought, agricultural drought and socioeconomic drought.
3.2 meteorological drought
In a certain period of time, due to the imbalance of evapotranspiration and precipitation, the water expenditure is greater than the water income, resulting in the shortage of surface water. Phenomenon. [Source: GB/T 20481-2017, 3.1]
3.3 meteorological drought index
According to the formation principle of meteorological drought (3.2), a comprehensive index composed of precipitation, evapotranspiration and other elements is constructed.
Note: It is used to monitor or evaluate the degree of surface water shortage caused by abnormal weather and climate in a certain area for a certain period of time. [Source: GB/T 20481-2017, 3.2]
3.4 Drought intensity
Characterize the degree of meteorological drought (3.2) conditions.
Note: It is divided into four grades. mild drought, moderate drought, severe drought and extreme drought.
3.5
The sum of the absolute values of the meteorological drought index (3.3) with the drought intensity (3.4) reaching the grade of mild drought and above in a certain period of time.
3.6 It reflects
the degree of the average drought intensity (3.4) and the duration of drought in a certain period of time.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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