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Optimization of evapotranspiration models and synoptic conditions of reference evapotranspiration in Poland

Paweł Bogawski

Abstract

Evapotranspiration is a process of a crucial importance in water balance studies and irrigation practices and it is also difficult to be measured. Food and Agriculture Organization (FAO) experts developed a model for the reference evapotranspiration (ET0) estimation. This model shows reliable results in different places in the world. However, it produces poor results in case of the meteorological data shortages. In this study, the FAO-56 Penman-Monteith (FAO56) model was calibrated for climatic conditions in Poland. Consequently, this calibrated model is able to estimate ET0 reliably in case of the lack of radiation data. Among others, Hargreaves model was also calibrated and now it allows for reliable calculating ET0 in Poland using only temperature data. It was indicated that anticyclonic patterns in NE Poland and higher-than-normal air temperature at 850 hPa over Germany cause extremely high ET0 values in Poland. ET0 and factors that affect ET0 increased in years 1971-2010. Furthermore, pan evaporation data (evaporation pan: diameter= 5 m, depth= 2 m) were tested for using as a predictor for ET0. It was indicated that the data from this evaporation pan are not useful for estimating ET0, probably due to the large size of the pan.
Record ID
UAMde8f8174727044429b2a205f40ab881b
Diploma type
Doctor of Philosophy
Author
Paweł Bogawski (SNP/WB/LoBSI) Paweł Bogawski,,
Title in Polish
Optymalizacja metod wyznaczania oraz synoptyczne uwarunkowania ewapotranspiracji wskaźnikowej w Polsce
Title in English
Optimization of evapotranspiration models and synoptic conditions of reference evapotranspiration in Poland
Language
pl Polish
Certifying Unit
Faculty of Geographical and Geological Sciences (FoGaGS)
Discipline
geography / (Earth sciences domain) / (biological sciences)
Scientific discipline (2.0)
6.7 Earth and related environmental sciences
Defense Date
08-05-2017
End date
08-05-2017
Supervisor
URL
http://hdl.handle.net/10593/17684 opening in a new tab
Keywords in English
Hargreaves model, FAO-56 Penman-Monteith, extreme evapotranspiration values, atmospheric circulation types, climatic change, evapotranspiration
Abstract in English
Evapotranspiration is a process of a crucial importance in water balance studies and irrigation practices and it is also difficult to be measured. Food and Agriculture Organization (FAO) experts developed a model for the reference evapotranspiration (ET0) estimation. This model shows reliable results in different places in the world. However, it produces poor results in case of the meteorological data shortages. In this study, the FAO-56 Penman-Monteith (FAO56) model was calibrated for climatic conditions in Poland. Consequently, this calibrated model is able to estimate ET0 reliably in case of the lack of radiation data. Among others, Hargreaves model was also calibrated and now it allows for reliable calculating ET0 in Poland using only temperature data. It was indicated that anticyclonic patterns in NE Poland and higher-than-normal air temperature at 850 hPa over Germany cause extremely high ET0 values in Poland. ET0 and factors that affect ET0 increased in years 1971-2010. Furthermore, pan evaporation data (evaporation pan: diameter= 5 m, depth= 2 m) were tested for using as a predictor for ET0. It was indicated that the data from this evaporation pan are not useful for estimating ET0, probably due to the large size of the pan.
Thesis file

Uniform Resource Identifier
https://researchportal.amu.edu.pl/info/phd/UAMde8f8174727044429b2a205f40ab881b/

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