GB/T 20483-2025 English PDF

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GB/T 20483-2025: Land desertification monitoring method
Status: Valid

GB/T 20483: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20483-2025	269	Add to Cart	3 days	Land desertification monitoring method	Valid
GB/T 20483-2006	599	Add to Cart	4 days	Land desertification monitoring method	Valid

Similar standards

GB/T 37254   GB/T 33679   GB/T 33673   GB/T 20480   GB/T 20487   

Basic data

Standard ID: GB/T 20483-2025 (GB/T20483-2025)
Description (Translated English): Land desertification monitoring method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A47
Classification of International Standard: 07.060
Word Count Estimation: 13,143
Date of Issue: 2025-06-30
Date of Implementation: 2025-10-01
Older Standard (superseded by this standard): GB/T 20483-2006
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 20483-2025: Land desertification monitoring method

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20483-2025
ICS 07.060 CCSA47 National Standard of the People's Republic of China Replaces GB/T 20483-2006 Land desertification monitoring methods Released on June 30, 2025 Implementation on October 1, 2025 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Monitoring data 2 5 Monitoring Area 2 6 Monitoring indicators 3 7 Desertification degree 4 Appendix A (Normative) Calculation of Potential Evapotranspiration 5 Appendix B (Normative) Desert Patches Remote Sensing Identification Method 6 Appendix C (Normative) Calculation of Net Primary Productivity of Vegetation 7 References 9 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 20483-2006 “Methods for monitoring land desertification”. Compared with GB/T 20483-2006, except for the structural adjustment, Besides the editorial changes, the main technical changes are as follows. a) Added “Data, regions, indicators and methods for land desertification monitoring” in the “Scope”, which is applicable to “Dynamic monitoring of land desertification”. Assessment of desertification caused by climate change and desertification in the.2006 edition" (see Chapter 1); b) Deleted “Selection of monitoring sample areas and measurement points” (see 4.1 of the.2006 edition); c) Change “test items and methods” to “monitoring data” (see Chapter 4, 4.2 of the.2006 edition); d) Deleted “Common Equipment for Desertification Monitoring” (see 4.3 of the.2006 edition); e) Change “monitoring of climate change and human activities” to “monitoring areas” (see Chapter 5, Chapter 5 of the.2006 edition), and add The dryness level was changed (see 5.1), the humidity index monitoring (see 5.2 of the.2006 edition) was deleted, and the satellite remote sensing of desertification was added. The identification of desert patches (see 5.3) and the statistics of groundwater levels and human activities (see 5.4, 5.5); f) Changed "Monitoring of desertification attributes" to "Monitoring indicators" (see Chapter 6 of the.2006 edition), and added vegetation cover The vegetation coverage and vegetation productivity monitoring indicators (see 6.1 and 6.2) have been deleted. The content of vegetation coverage image processing has been deleted (see the.2006 edition of 6.4.1.3.2); g) Added “Degree of Desertification” (see Chapter 7); h) Added the calculation method of vegetation net primary productivity (see 6.2, Appendix C); i) The content on interpretation of aerial survey images has been deleted (see 7.4.2 of the.2006 edition); j) Deleted the satellite image data source and processing flow (see 7.5 of the.2006 edition); k) Deleted “Record Form Format” (see Appendix A of the.2006 edition); l) Change “Budko synthesis method for calculating evaporation power” to “desert patch remote sensing identification method” (see Appendix A, Appendix B of the.2006 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Meteorological Administration. This document is under the jurisdiction of the National Technical Committee on Climate and Climate Change Standardization (SAC/TC540). This document was drafted by. National Climate Center, Institute of Aerospace Information Innovation of Chinese Academy of Sciences, Lanzhou Vocational and Technical University of Resources and Environment, Shaanxi Provincial Meteorological Bureau, Xinjiang Uygur Autonomous Region Meteorological Bureau. The main drafters of this document are. Xiao Fengjin, Liu Qiufeng, Wang Jie, Qin Yun, Xu Yuqing, Zhang Diaofeng, Wang Zhao, Liao Yaoming, Wang Hui, and Wang Lei. The previous versions of this document and the documents it replaces are as follows. ---First published in.2006 as GB/T 20483-2006; ---This is the first revision. Land desertification monitoring methods 1 Scope This document specifies the data, regions, indicators and desertification degree requirements for land desertification monitoring, and describes the land desertification monitoring Technical methods. This document is applicable to the dynamic monitoring of land desertification and the assessment of desertification caused by climate change, wind erosion, water erosion, freeze-thaw and soil It can be used as a reference for monitoring and assessment of desertification caused by soil salinization. 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 20480 Dust weather levels GB/T 33705 Soil moisture observation frequency domain reflectometry GB/T 35223 Surface meteorological observation specification for meteorological visibility GB/T 35226 Surface meteorological observation specification for air temperature and humidity GB/T 35227 Specification for surface meteorological observations—wind direction and speed GB/T 35228 Precipitation according to surface meteorological observations GB/T 35230 Surface meteorological observation requirements for evaporation LY/T 1752-2008 Technical Specification for Positioning Observation of Desert Ecosystems 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 desert A natural area with a dry climate, scarce rainfall, sparse and low vegetation, and barren land. 3.2 desertification The phenomenon of land degradation in arid, semi-arid, and dry sub-humid areas caused by factors such as climate change and human activities. 3.3 desert patch Objects or irregular blocks with corresponding spatial positions in remote sensing images that correspond to desert features. 3.4 aridity index The ratio of annual potential evapotranspiration to annual precipitation in a region. Note. It is used to characterize the balance between precipitation and evapotranspiration during a certain period of time, and reflect the dry and wet conditions of the region. ......

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