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WCRP, 44. Report of the second session of the JSC Scientific Steering Group for GEWEX
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU) - WMO, 1990 (WMO/TD-No. 383)
WCRP, 38. Global Energy and Water Cycle Experiment (GEWEX) : report of the first session of the WCRP-GEWEX/IGBP-CP3 Joint Working Group on Land-surface Experiments
International Council for Science (ICSU); World Meteorological Organization (WMO) - WMO, 1990 (WMO/TD-No. 370)
WCRP, 25. Global Energy and Water Cycle Experiment (GEWEX) : report of the first session of the JSC Scientific Steering Group for GEWEX
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU) - WMO, 1989 (WMO/TD-No. 321)
Operational hydrology report (OHR), 24. Level and discharge measurements under difficult conditions
The report, approved by Commission for Hydrology at its seventh session in 1984, constitutes valuable guidance for hydrologists on measuring river flow under difficult conditions and supplements the Guide to hydrological practices (WMO-No. 168) and the Manual on stream gauging (WMO-No. 519).
Operational hydrology report (OHR), 23. Intercomparison of models of snowmelt runoff
This report contains the full results of the WMO project on intercomparison of models of snowmelt runoff which was initiated in 1976 and completed in 1983.
Operational hydrology report (OHR), 22. Casebook on operational assessement of areal evaporation
The loss of fresh water through evaporation and evapotranspiration directly affects the availability of water resources and their development and management for human requirements. In view of the difficulties inherent in measuring areal evaporation with acceptable accuracy, it was decided to collect case studies of various methods of approach to provide practical guidance. Fifteen case studies were selected and are presented here.
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La vapeur d'eau : recueil de notes sur les appareils de mesure
Organisation météorologique mondiale (OMM); Centre régional de formation et d'application en agrométéorologie et hydrologie opérationnelle ; Programme des Nations Unies pour le Développement (PNUD) - OMM, 1984
Operational hydrology report (OHR), 11. Hydrological application of atmospheric vapour-flux analysis
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 ...
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