DB43/T 2074-2021 降水过程划分

ICS07.060

CCSA47

43

湖南省地方标准

DB43/T2074—2021

降水过程划分

Rainfallprocessclassification

2021-05-28发布2021-08-28实施

湖南省市场监督管理局发布

DB43/T2074—2021

目次

前言························································································································Ⅲ

1范围·····················································································································1

2规范性引用文件······································································································1

3术语和定义············································································································1

4降水过程划分方法···································································································3

附录A（规范性）········································································································5

附录B（资料性）降雨覆盖范围（Cp）计算和指数划分·····················································6

附录C（规范性）········································································································7

参考文献····················································································································8

I

DB43/T2074—2021

II

DB43/T2074—2021

前言

本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规

定起草。

请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。

本文件由湖南省气象局提出。

本文件由湖南省气象标准化技术委员会归口。

本文件起草单位：湖南省气象台。

本文件起草人：蔡荣辉、李巧媛、姚蓉、唐佳、苏涛。

III

DB43/T2074—2021

IV

DB43/T2074—2021

降水过程划分

1范围

本文件规定了降水过程划分方法，适用于气象预报、气象灾害评估、气象风险监测、农业、林业、

水利及其与气象相关的科研部门对降水过程强度的科学研究等。

2规范性引用文件

下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件，

仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本

文件。

GB/T21984—2008短期天气预报

GB/T27956—2011中期天气预报

GB/T27966—2011灾害性天气预报警报指南

GB/T28592—2012降水量等级

GB/T28594—2012临近天气预报

QX/T341—2016降水过程强度行业

DB43/T232—2004天气术语

DB43/T835—2013湖南极端降水事件监测方法与判别指标

3术语和定义

下列术语和定义适用于本文件。

3.1

降水precipitation

从天空降落到地面的液态、固态水分，本文件仅适用于液态降水。

[来源：DB43/T835—2013，2.1，有修改]。

3.2

降雨过程rainfallprocess

单站或区域降雨开始到降雨结束，期间每24小时雨量需大于等于0.1mm，且降水持续时间为2天

或以上。

[来源：QX/T341—2016，2.2，有修改]

3.3

影响范围affectedarea

过程中发生降水事件的站点所在的行政区域。

3.4

持续时长duration

1

DB43/T2074—2021

从持续性降水事件开始日到结束日之间的持续日数，单位为天（d）。持续降水12小时以