Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 525579
Title Het klimaat en de verdamping van een meer in Centraal Irak
Author(s) Wartena, L.
Source University. Promotor(en): W.R. van Wijk. - Wageningen : Veenman - 90
Publication type Dissertation, internally prepared
Publication year 1959
Keyword(s) hydrologie - limnologie - meren - plassen - meteorologie - evaporatie - evapotranspiratie - irrigatie - bodem - klimatologie - water - oppervlakten - irak - reservoirs - hydrology - limnology - lakes - ponds - meteorology - evaporation - evapotranspiration - irrigation - soil - climatology - surfaces - iraq
Categories Climatology
Abstract After describing the continental subtropical climate of central Iraq, Wartena assembled other meteorological observations necessary to estimate evaporation from a lake and irrigation project.

Usual formulae correlating total global radiation with duration of sunshine gave an overestimate with clear sky, an underestimate with cloud cover. A new relationship was derived which gave better results.

A critical discussion of the energy balance of an evaporation pan clearly showed that 'pan factors' could not be constants but depended on weather conditions and time of year. Kohler's theory yielded inaccurate results. Especially in and regions, to assume a constant ratio between 'potential' and actual evaporation may lead to considerable error but a 'class A' pan satisfactorily indicated irrigation requirements. The 'Piche' evaporimeter was not satisfactory.

To estimate evaporation from the projected storage lake, its surface temperatures were calculated by using elementary meteorological quantities. The method was in reasonable agreement with actual values on the existing Lake of Tiberias. The evaporation from fictitious lakes 10 and 50 metres deep was calculated to be different.

Qualitative influences of wind, humidity and temperature of the atmosphere on evaporation were discussed.

Yearly evaporation from the two lakes was estimated at 2500 mm.

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