GB/T 34306-2017 English PDF

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GB/T 34306-2017: Grade of drought disaster
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34306-2017	199	Add to Cart	3 days	Grade of drought disaster	Valid

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Basic data

Standard ID: GB/T 34306-2017 (GB/T34306-2017)
Description (Translated English): Grade of drought disaster
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A47
Classification of International Standard: 07.060
Word Count Estimation: 10,160
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 34306-2017: Grade of drought disaster

---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.
Grade of drought disaster ICS 07.060 A47 National Standards of People's Republic of China Drought hazard level 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 Foreword Ⅲ 1 Scope 1 2 Terms and definitions 1 3 Drought hazard index 1 4 Drought hazard level 3 Reference 4

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 was drafted unit. National Climate Center. The main drafters of this standard. Zou Xukai, Zhang Qiang, Chen Xiangyan, Wang Ling. Drought hazard level

1 Scope

This standard specifies the method of classifying and classifying drought disasters. This standard applies to agriculture, forestry, hydrology, meteorology and other related social and economic fields of drought disaster monitoring and evaluation of business and research jobs.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Climatologicalnormal The meteorological elements of the multi-year average, taking the average of the last three years as the climate average. 2.2 Meteorological drought Due to the unbalanced income and expenditure of evaporation and precipitation in a period of time, the water shortage caused by the expenditure of water exceeds the income of water. [GB/T 20481-2016, Definition 2.12] 2.3 Agricultural drought Crop growth season, due to insufficient supply of water lead to uneven supply and demand of farmland water, hinder the normal crop growth and development phenomenon. [GB/T 32136-2015, Definition 3.8] 2.4 Hydrological drought Due to the long-term shortage of rainfall, surface water or groundwater have unbalanced their income and expenditure for a certain period of time, causing water shortage and river runoff Volume, lake water level, reservoir water reduction phenomenon. 2.5 Droughtdisaster During a certain period of time, the human and social economic activities in a certain area were severely affected by the drought and the disaster occurred.

3 Drought hazard index

3.1 crops drought area rate level The area of drought-affected crops refers to the ratio of the area affected by drought in the drought-affected areas to the area of cultivated land (sown) in the area. The crop area affected by drought Decreased by drought more than 10% of the area, single drought denominator for the cultivated land area, multiple drought denominator for the sown area. See formula (1). I = Ad Ap × 100% (1) In the formula. I --- crop drought area rate, expressed as a percentage (%); ......

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