Topics
Sorted by (Issue date descending, Date of update descending, Date of creation descending, Number of collection descending) Add the result to your favourites Refine your search
IOM Report, 39. Catalogue of national standard precipitation gauges
The present report contains tables with information on the national standard PGs of the WMO Members, including cross-sections of PGs, a brief review of the problems of accuracy of precipitation measurement. and of the results of wind tunnel tests regarding aerodynamical characteristics of PGs and correction procedures of the wind-induced error, wetting and evaporation.Precipitation measurement : WMO/IAHS/ETH Workshop on precipitation measurement
World Meteorological Organization (WMO) ; International Association of Hydrological Sciences (IAHS) - Swiss Federal Institute of Technology, 1989
IOM Report, 17. International comparison of national precipitation gauges with a reference Pit gauge
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.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 ...
Add tag 
