SL 21-1990
Precipitation Observation Specifications (English Version)

Standard No.

SL 21-1990

Language

Chinese, Available in English version

Release Date

1991

Published By

Professional Standard - Water Conservancy

Status

Be replaced 2015-12

Replace By

SL 21-2006

SL/T 21-2015

Latest

SL 21-2015

SL/T 21-2015

Scope

This specification applies to precipitation observations at basic rainfall stations, including independently established basic rainfall stations and hydrological stations, water level stations, water surface evaporation stations and groundwater level stations that also serve as basic rainfall stations.

SL 21-1990 history

• 2015 SL 21-2015 Specification for precipitation observations
• 2006 SL 21-2006 Standard for observations of precipitation
• 1991 SL 21-1990 Precipitation Observation Specifications