GB/T 20482-2017Grade of snow disaster in pastoral area (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 20482-2006 "pastoral snow disaster level." Compared with GB/T 20482-2006 main technical changes are as follows.

--- Modify the English name;

--- Introduction to the contents of the standard were refined;

--- In the scope of the provisions of this standard has been amended (see Chapter 1 of the 2006 edition);

--- Modify the pastoral snow disaster definition (see 2.1, 2006 edition 2.1);

--- Modify the definition of snow depth (see 2.2, 2006 version 2.2);

--- Modify the definition of the average height of herds (see 2.3, 2006 version 2.3);

--- Modify the definition of the duration of snow cover (see 2.4, 2006 version 2.4);

--- Modify the definitions and units of snow covered grazing degree (see 2.6, 2006 edition 2.6);

--- Modify the snow area ratio definition and unit (see 2.7, 2006 edition 2.7);

--- Modify the pasture snow level (see Chapter 3, 2006 edition Chapter 3);

--- Increased pastoral snow scale rating table buried in the degree of snow covered by snow, the number of days of snow cover, snow area ratio interval values;

--- Modify the appendix (see Appendix A, 2006 edition of Appendix A).

Introduction

Snow disaster is one of the major meteorological disasters in pastoral areas in winter and spring. Due to the long duration of the snowstorm and the wide range of impacts, it is often given to local farmers and herdsmen Production and life caused serious harm, a direct threat to and restricted the development of animal husbandry in pastoral areas. Develop pastoral snow disaster standards, weather conditions are the most Important and most fundamental factor. In addition, snowstorms and forage apologies, livestock status, pasture types, pasture conditions and the ability to withstand disasters related. This revision, give full consideration to GB/T 20482-2006 "snow pasture grading" in the past 5 years, the actual business applications of snow buried grass The degree of snow cover, the duration of snow cover and the area affected by the disaster, the three key hazard factors in the Tibetan Plateau meadow grassland and Inner Mongolia grassland pasture One-of-a-kind and representative issues. At the same time, to solve the forecast and meteorological services, forecasters inconvenient operation and other issues.

1 Scope

This standard specifies the grade and division index of snow disaster in pastoral areas of China.

This standard applies to the survey, statistics, assessment and release of snow calamities in pastoral areas of China.

2 Terms and definitions

The following terms and definitions apply to this document.

3 Pastoral snow disaster rating

According to the degree of snow covered grazing, snow duration and snow area ratio of the three indicators of pastoral snowstorm, divided into mild disaster, disastrous, heavy Disaster and catastrophe four levels (see Table 1). Please refer to Appendix A for the possible disaster situations at each level.