DB43/T 2901-2024 非典型暴雨过程划分规范

ICS91.120.40

CCSK30

43

湖南省地方标准

DB43/T2901—2024

非典型暴雨过程划分规范

Standardforclassificationofatypicalrainstormprocess

2024-01-09发布2024-04-09实施

湖南省市场监督管理局发布

DB43/T2901—2024

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非典型暴雨过程划分································································································2

4.1非典型暴雨过程的分型·······················································································2

4.2非典型暴雨过程划分··························································································2

附录A（资料性）········································································································4

附录B（资料性）········································································································5

附录C（资料性）········································································································7

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

I

DB43/T2901—2024

II

DB43/T2901—2024

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。

本文件主要起草人：许霖、姚倩、龙晴柔、刘稚舟、唐佳、张海、卢姝、付小霞、桑友伟、周莉、

王璐。

III

DB43/T2901—2024

IV

DB43/T2901—2024

非典型暴雨过程划分规范

1范围

本文件规定了湖南非典型暴雨过程的划分标准。

本文件适用于湖南气象预报、决策气象服务、风险评估等业务和科学研究。

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/T28592—2012降水量等级

GB31221—2014气象探测环境保护规范地面气象观测站

DB43/T2074—2021降水过程划分

3术语和定义

下列术语和定义适用于本文件。

3.1

降水量precipitation

某一时段内，从天空降落到地面上的液态（降雨）或固态（降雪）（经融化后）降水，未经蒸发、

渗透、流失而在水平面上积聚的深度，规定以毫米（mm）为深度单位。

[来源：GB/T28592—2012，2.1，有修改]

3.2

暴雨rainstorm

24小时降水量大于或等于50毫米且小于100毫米的降水事件。

[来源：GB/T28592—2012，2.1，有修改]

3.3

大暴雨downpour

24小时降水量大于或等于100毫米且小于250毫米的降水事件。

[来源：GB/T28592—2012，2.1，有修改]

3.4

特大暴雨torrentialrain

24小时降水量大于或等于250毫米的降水事件。

[来源：GB/T28592—2012，2.1，有修改]

3.5

站数stations

降水事件中出现某一等级降水量级的站数，仅指国家地面气象观测站。

1

DB43/T2901—2024

[来源：DB43/T2074—2021，术语和定义3.5，有修改]

3.6

地面气象观测站groundweather-observationstation

为开展长期连续地面气象观测，由国务院气象主管机构、地方各级气象主管机构以及国务院其他有

关部门和省、自治区、直辖市其他有关部门设立的地面气象观测场所。

[来源：GB/T31221—2014,术语和定义2.1]

3.7

非典型暴雨non-typicalrainstorms

日降水量大于或等于50毫米的降水，降水发生时未受台风（热带低压）、梅雨锋切变、华南准静止

锋或西南低涡影响。

4非典型暴雨过程划分

4.1非典型暴雨过程的分型

非典型暴雨根据天气形势可以分为三种类型：高空冷涡型、弱天气尺度型以及高架对流型，其中弱

天气尺度型又包含西南气流、副热带高压内部和副热带高压南侧三类。不同类型非典型暴雨天气具体环

流形势如下：

（1）高空冷涡型