GB/T 34307-2017 English PDF

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GB/T 34307-2017: Grades of dry/wet climate
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34307-2017	359	Add to Cart	4 days	Grades of dry/wet climate	Valid

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Basic data

Standard ID: GB/T 34307-2017 (GB/T34307-2017)
Description (Translated English): Grades of dry/wet climate
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A47
Word Count Estimation: 18,184
Date of Issue: 2017-09-07
Date of Implementation: 2018-04-01
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 34307-2017: Grades of dry/wet climate

---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.
Grades of dry/wet climate ICS 07.060 A47 National Standards of People's Republic of China Wet and dry climate rating 2017-09-07 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Preface Ⅰ 1 Scope 1 2 Terms and definitions 1 3 wet and dry climate rank, name and its indicator 2 4 wet and dry climate division index calculation method 2 Appendix A (Normative) Wetting and Drying Index formula 3 Appendix B (Normative) Reference crop evapotranspiration formula 4 Appendix C (informative) as, bs reference value 8 References 14

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 Climate and Climate Change Technical Committee (SAC/TC540) centralized. This standard drafting unit. China Meteorological Research Institute, National Climate Center, Guangxi Zhuang Autonomous Region Bureau of Meteorology, China Meteorological Administration public gas Like service center, China Meteorological Bureau Meteorological Exploration Center, Hubei Meteorological Bureau, National Meteorological Center. The main drafters of this standard. Mao Fei, Liao Yao Ming, Sun Han, Wang Peijuan, Yuan Chunhong, Zhang Xuefen, Feng Ming, Lu Houquan, Bai Yueming, Li Shikui. Wet and dry climate rating

1 Scope

This standard specifies the level of wet and dry climate, divided into indicators and calculation methods. This standard applies to wet and dry climate assessment and zoning and other business research.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Dryness/wetness index; dry-wetindex DWI Indicators of wet and dry climate. 2.2 Precipitation precipitationamount Unpoured, infiltrated, lost rainfall over a period of time, the depth of accumulation on the horizon. [QX/T 52-2007, definition 3.2] 2.3 Reference crop evapotranspiration referencecropevapotranspiration The surface is open, highly consistent, vigorous growth, completely covering the ground and the water is sufficient green grass and the amount of evaporation and evaporation. green Grassland assumed vegetation height of 0.12m, surface resistance of 70s/m, reflectivity of 0.23. 2.4 Potential sunshine hours potentialsunshineduration Astronomy day length Ignoring the effects of topography and cloud cover, the center of the sun appears on the horizon reaching the western horizon, too The longest exposure time of direct sunlight. 2.5 Sunshineduration Photo hours The actual hours of the sun's exposure to one place. At a given time, the sunshine duration is defined as the direct solar irradiance reaching or exceeding 120 W/m2 The sum of the period of time. Reproduced from QX/T 56-2007, Definition 3.2. 2.6 Atmospheric top solar radiation extraterrestrialradiation Solar radiation received at the level of the Earth's atmosphere. 2.7 Soil heat flux density soilheatfluxdensity The amount of heat exchange between soil and atmosphere per unit time. Note Positive when the soil warms and negative when the soil cools. ......

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