GB/T 20486-2017 English PDF

US$179.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 20486-2017: Grade of valley area precipitation
Status: Valid

GB/T 20486: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20486-2017	179	Add to Cart	3 days	Grade of valley area precipitation	Valid
GB/T 20486-2006	319	Add to Cart	3 days	Grade of valley area rainfall	Obsolete

Similar standards

GB/T 37254   GB/T 33679   GB/T 33673   GB/T 20483   GB/T 20480   

Basic data

Standard ID: GB/T 20486-2017 (GB/T20486-2017)
Description (Translated English): Grade of valley area precipitation
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A47
Classification of International Standard: 07.060
Word Count Estimation: 9,948
Date of Issue: 2017-05-12
Date of Implementation: 2017-12-01
Older Standard (superseded by this standard): GB/T 20486-2006
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
Summary: This standard specifies the river basin watershed grading, calculation methods. This standard applies to the river basin rainfall monitoring, forecasting, service and other business and scientific research.

GB/T 20486-2017: Grade of valley area precipitation

---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 valley area precipitation ICS 07.060 A47 National Standards of People's Republic of China Replacing GB/T 20486-2006 River Basin Rainfall Level 2017-05-12 released 2017-12-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 20486-2006 "River Basin Rainfall Level". Compared with GB/T 20486-2006, the main technology changes As follows. - modified the definition of the basin (see 2.1,.2006 version 2.1); (See 2.2 and 2.3); modified English statements of surface rainfall (see 2.4 and English names); --- In the third section of the rain level of the provisions of the division, the modification of the heavy rain level 12h, 24h rainfall upper limit and the big storm Rain level 12h, 24h level of rainfall lower limit (see Chapter 3); Amend Table A.1 of Appendix A to align it with the relevant provisions in GB/T 28592-2012 "Precipitation Level" (see attached A,.2006 Appendix A); - the specific contents of Chapter 4, the calculation of surface rainfall were removed, replaced by Appendix B (see Chapter 4, Chapter 4 of.2006); In the method of calculating the surface rainfall, an overview is given and the Kriging method (see Appendix B). This standard is proposed by the China Meteorological Administration. The standard by the National Meteorological Disaster Prevention and Disaster Reduction Standardization Technical Committee (SAC/TC345) centralized. The drafting of this standard. Henan Meteorological Bureau, China Meteorological Administration Public Weather Service Center, the Yellow River Basin Meteorological Center, Huaihe River Basin Meteorology center. The main drafters of this standard. Li Fei, Zhang Cun, Zheng Shilin, Wang Li, Ye Jinyin, Zhao Luqiang, Yu Weidong, Zhao Luxia, Jiang Qingxia. This standard has been replaced by the previous version of the standard release. --- GB/T 20486-2006.

Introduction

The monitoring and forecasting of rainfall in the basin is not only an important parameter of flood forecasting and flood control dispatching, but also the decision of flood control and flood control The important basis. 2004-2005 Urban Meteorological Bureau in Henan Province to bear the preparation of the river basin level of the recommended level of rain, August 28,.2006 by the National Standardization Management Committee issued (GB/T 20486-2006). The operation indicated that the standard was developed to promote the river basin rainfall industry Service and service work has played a positive role in the standardization. To further adapt to business development and service needs, and with the release in.2012 Water quality level of the national standards in accordance with the relevant provisions of the GB/T 20486-2006 were revised. River Basin Rainfall Level

1 Scope

This standard specifies the river basin level of rainfall classification, calculation methods. This standard applies to river basin rainfall monitoring, forecasting, service and other business and scientific research.

2 terms and definitions

The following terms and definitions apply to this document. 2.1 Watershed valey River catchment area. The watershed is surrounded by watersheds, and the watersheds are made up of ridge lines of mountains or highlands, surrounded by watersheds Is the catchment area of the river. 2.2 Site rain stationprecipitation The amount of liquid precipitation from the sky to the ground measured at a particular location. Note. In millimeters (mm) as a unit, take a decimal. 2.3 Rainfall grade grade ofprecipitation According to the unit time the size of the site rainfall and the level, used to reflect the intensity of rainfall. 2.4 The amount of rain isalprecipitation The average rainfall for a particular area or basin in a given period. Note. In millimeters (mm) as a unit, take a decimal.

3 level of rainfall

The level of rainfall is divided into light rain, heavy rain, heavy rain, heavy rain, heavy rains based on the division of site rainfall levels (see Appendix A) Rain and heavy rain 6 levels. The level of the corresponding 12h, 24h rainfall amplitude in Table 1. Table 1 River Basin Grain Level Classification Table River surface rainfall level 12h surface rainfall value/mm 24h rainfall value/mm Light rain 0.1 ~ 2.9 0.1 ~ 5.9 Medium rain 3.0 ~ 9.9 6.0 ~ 14.9 Heavy rain 10.0 ~ 19.9 15.0 ~ 29.9 Heavy rain 20.0 ~ 39.9 30.0 ~ 59.9 Heavy rain 40.0 ~ 79.9 60.0 ~ 149.9 Heavy rain ≥ 80.0 ≥150.0 ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 20486-2017_English be delivered?

Answer: Upon your order, we will start to translate GB/T 20486-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 20486-2017_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 20486-2017_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 20486-2017?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20486-2017 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.