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World Meteorological Organization (WMO)
Event: Workshop on the correction of precipitation measurements (1-3 April 1985; Zurich, Switzerland)
Published by: WMO ; 1985Collection(s) and Series: WMO/TD- No. 104; IOM Report- No. 25
Language(s): English
Format: Digital (Free), Hard copyTags: Instruments and Methods of Observation Programme (IMOP) ; Precipitation forecasting ; Capacity development ; IOM 25
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IOM Report, 17. International comparison of national precipitation gauges with a reference Pit gauge
Published by: WMO ; 1984
Collection(s) and Series: WMO/TD- No. 38; IOM Report- No. 17
Language(s): English
Format: Digital (Free), Hard copyTags: Instruments and Methods of Observation Programme (IMOP) ; Observations ; Precipitation forecasting ; Hydrometeorological instrument ; IOM 17
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Operational hydrology report (OHR), 21. Methods of correction for systematic error in point precipitation measurement for operational use
This publication, in the form of an operational manual, describes methods of correcting errors with diagrams, formulae, a detailed chronology and over 100 references. The long-term aim is the wider acceptance and use of internationally recognized methods of correcting precipitation data.Published by: WMO ; 1982
This publication, in the form of an operational manual, describes methods of correcting errors with diagrams, formulae, a detailed chronology and over 100 references. The long-term aim is the wider acceptance and use of internationally recognized methods of correcting precipitation data.
Collection(s) and Series: WMO- No. 589; Operational hydrology report (OHR)- No. 21
Language(s): English
Format: Digital (Available online for logged-in users), Hard copyISBN (or other code): 978-92-63-10589-9
Purchase at: http://www.wmo.int/e-catalog/detail_en.php?PUB_ID=296&SORT=N&q=
Tags: Weather ; Precipitation forecasting ; Forecast error ; Methodology ; OHR 21
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Evaporation losses from containers of hellmann precipitation gauges
The evaporation losses from the container of an old galvanized Hellmann gauge, 7·1 cm2 aperture area, were five times greater than the losses from the container of a new gauge, 1·8 cm2 aperture area, of almost the same grey colour. The maximum evaporation from the old gauge amounted to 0·75 mm per day. The same evaporation losses in the Baye of Montreux basin over a period of 10 years from April to September amounted to 0·09 mm per measurement or to 0·7 per cent of the precipitation catch. There is a relationship between the monthly percentage evaporation losses and the ratio of evaporation ti ...[article]
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Available online: http://www.tandfonline.com/doi/pdf/10.1080/02626667409493902
in Hydrological Sciences Journal > Volume 19, No.2 (June 1974) . - p.231-236The evaporation losses from the container of an old galvanized Hellmann gauge, 7·1 cm2 aperture area, were five times greater than the losses from the container of a new gauge, 1·8 cm2 aperture area, of almost the same grey colour. The maximum evaporation from the old gauge amounted to 0·75 mm per day. The same evaporation losses in the Baye of Montreux basin over a period of 10 years from April to September amounted to 0·09 mm per measurement or to 0·7 per cent of the precipitation catch. There is a relationship between the monthly percentage evaporation losses and the ratio of evaporation time and rainfall duration (r = 0·803).
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Les pertes par évaporation d'un pluviomètre galvanisé de type Hellmann sont cinq fois plus importantes dans un appareil ancien que dans un appareil neuf de même couleur. L'évaporation journalière maximale d'un réservoir ancien correspond à 0·75 mm de précipitation. Ces mêmes pertes évaluées dans le bassinversant de la Baye de Montreux ont, sur dix ans, une valeur moyenne de 0·09 mm par jour, ce qui équivaut à 0·7 pour cent de la précipitation totale mesurée. Il existe une relation entre le pourcentage de l'évaporation d'une part et le rapport des durées d'évaporation et de précipitation d'autre part.Language(s): English
Format: Digital (Free), Hard copyTags: Water ; Hydrology ; Evaporation ; Precipitation forecasting
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Published by: WMO ; 1973
Collection(s) and Series: WMO- No. 343; Reports on WMO/IHD Projects- No. 17
Language(s): English
Format: Hard copyTags: Observations ; Precipitation forecasting ; Hydrometeorological instrument
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