SL 21-1990Precipitation observing practices (English PDF)
降水量观测规范
SL 21 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| SL 21-2015 | Precipitation observing practices | Valid |
| SL 21-2006 | Standard for observations of precipitation | Obsolete |
| SL 21-1990 | Precipitation observing practices | Obsolete |
SL 21-1990 is obsolete. It has been replaced by SL 21-2006. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
Ministry of Water Resources of the People's Republic of China
Level / Type
National · Mandatory
Issue date
February 21, 1991
Implementation date
June 30, 1991
Scope
SL 21-1990 is the English-translated version of 降水量观测规范.
SL 21-1990 is the Chinese industry standard "Precipitation observing practices". It was issued on February 21, 1991 by the Ministry of Water Resources of the People's Republic of China, and took effect on June 30, 1991. It is obsolete: it has been replaced by SL 21-2006.
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Document preview — SL 21-1990
National Standard of the People's Republic of China
Issued by: Ministry of Water Resources of the People's Republic of China
Contents
- Document data
1 Document data
Sector: Water Resources (industry standard).
Issuing body: Ministry of Water Resources of the People's Republic of China.
Date of issue: 1991-02-21.
Date of implementation: 1991-06-30.
Status: obsolete, replaced by SL 21-2006.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 41222-2021Soil quality—Method for monitoring the farmland surface runoff
- GB/T 31153-2014Climatic evaluation methods of precipitation resource in the catchment area of small hydropower stations
- SL 601-2013Technical specification for concrete dam safety monitoring
- SL 630-2013Standard for observations of water surface evaporation
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SL 21-1990
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