Estimation of Reference Evapotranspiration using the FAO Penman-Monteith Method for Climatic Conditions of Poland

Labedzki, L.; Kanecka‐Geszke, Ewa; Bąk, B.; Słowińska, Sandra

doi:10.5772/14081

Cited by 33 publications

(23 citation statements)

References 11 publications

(1 reference statement)

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“…The results show that the temporal variations and spatial distribution of soil moisture were related to precipitation [32], soil texture (i.e., fraction of sand, silt, and clay), and hydrophysical characteristics, including water holding capacity presented in the databases for Polish arable mineral soils [36,37]. The largest average SM observed in most years in the first quarter (winter) (except 2012 and 2013) was mainly related to the recharge of precipitation as well as low temperature and evapotranspiration [38]. This recharge was further reflected in higher soil moisture in spring than in summer, except 2013 due to the long persistence of snow until the end of April.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Soil Moisture Variability in Poland from SMOS Satellite Observations

2019

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Soil moisture (SM) data play an important role in agriculture, hydrology, and climate sciences. In this study, we examined the spatial-temporal variability of soil moisture using Soil Moisture Ocean Salinity (SMOS) satellite measurements for Poland from a five-year period (2010–2014). SMOS L2 v. 551 datasets (latitudinal rectangle 1600 × 840 km, centered in Poland) averaged for quarterly (three months corresponding to winter, spring, summer, and autumn) and yearly values were used. The results were analysed with the use of classical statistics and geostatistics (using semivariograms) to acquire information about the nature of anisotropy and the lengths and directions of spatial dependences. The minimum (close to zero) and maximum soil moisture values covered the 0.5 m3 m−3 range. In particular quarters, average soil moisture did not exceed 0.2 m3 m−3 and did not drop below 0.12 m3 m−3; the corresponding values in the study years were 0.171 m3 m−3 and 0.128 m3 m−3. The highest variability of SM occurred generally in winter (coefficient of variation, CV, up to 40%) and the lowest value was recorded in spring (around 23%). The average CV for all years was 32%. The quarterly maximum (max) soil moisture contents were well positively correlated with the average soil moisture contents (R2 = 0.63). Most of the soil moisture distributions (histograms) were close to normal distribution and asymmetric data were transformed with the square root to facilitate geostatistical analysis. Isotropic and anisotropic empirical semivariograms were constructed and the theoretical exponential models were well fitted (R2 > 0.9). In general, the structural dependence of the semivariance was strong and moderate. The nugget (C0) values slightly deceased with increasing soil moisture while the sills (C0 + C) increased. The effective ranges of spatial dependence (A) were between 1° and 4° (110–440 km of linear distance). Generally, the ranges were greater for drier than moist soils. Anisotropy of the SM distribution exhibited different orientation with predominance from north-west to south-east in winter and spring and changed for from north-east to south-west or from north to south in the other seasons. The fractal dimension values showed that the distribution of the soil moisture pattern was less diverse (smoother) in the winter and spring, compared to that in the summer and autumn. The soil moisture maps showed occurrence of wet areas (soil moisture > 0.25 m3 m−3) in the north-eastern, south-eastern and western parts and dry areas (soil moisture < 0.05 m3 m−3) mainly in the central part (oriented towards the south) of Poland. The spatial distribution of SM was attributed to soil texture patterns and associated with water holding capacity and permeability. The results will help undertake appropriate steps to minimize susceptibility to drought and flooding in different regions of Poland.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Soil Moisture Variability in Poland from SMOS Satellite Observations

2019

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“…Reference evapotranspiration (ETo) is an important agro-meteorological parameter for climatological and hydrological studies, as well as for irrigation planning and management [ŁABĘDZKI et al 2011]. Several national and international studies were implemented using a 30-year interval (climate normals) in climatological and hydrological studies.…”

Section: Introductionmentioning

confidence: 99%

Evapotranspiration data to determine agro-climatic zones in Egypt

Ouda

Norledin

2017

Journal of Water and Land Development

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The objective of this paper was to compare between agro-climatic zones developed from 10-year interval of weather data from 2005-2014, 20-year interval of weather data from 1995-2014 and the zoning developed by [NORELDIN et al. 2016] using 30-year interval from 1985-2014 in the old cultivated land of Egypt in the Nile Delta and Valley. Monthly means of weather data were calculated for each year, and then monthly values for 10-year and 20-years were calculated for each governorate. Basic Irrigation scheduling model (BISm) was used to calculate reference evapotranspiration (ETo). Analysis of variance was used and the means was separated and ranked using least significant difference test (LSD 0.05 ). Our results showed that agro-climatic zoning using 20-year values of ETo was similar to the zones developed with 30-year values of ETo, with different values of average ETo in each zone. Furthermore, using 10-year values of ETo resulted in higher values of ETo in each zone, compared to 20-year and 30-year ETo values. However, the average value of ETo over the three classifications was close to each other. Thus, depending on the availability of weather data, either zoning can be sufficient to develop agro-climatic zones.

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“…The drought-related meteorological conditions were determined using the climatic water balance (CWB) i.e., as a difference between the atmospheric precipitation and potential evaporation (Doroszewski et al, 2012(Doroszewski et al, , 2014Harmsen et al, 2009;Kanecka-Geszke and Smarzyńska, 2007;Legates and McCabe, 2005;Łabędzki, 2006;Łabędzki et al, 2011;Paltineanu et al, 2011;Rojek, 1987).…”

Section: Methodsmentioning

confidence: 99%

Agricultural autumn drought and crop yield in 2011 in Poland

Doroszewski¹,

Żyłowska²,

Nieróbca³

et al. 2018

Időjárás

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⎯Over the recent years, drought has been occurring with an ever increasing frequency in Poland. The longer the rainless period lasts, the more acute its impacts are. Agricultural drought manifests itself as a prolonged period of water shortage for agricultural crops during their growth season resulting in yield reduction. Extent of drought was evaluated by the climatic water balance (CWB). Climatic water balance is an indicator that determines the state of humidification of the environment using data measured at meteorological stations. It is defined as the difference between atmospheric precipitation and evapotranspiration (in millimeters) calculated by an empirical formula taking into account: temperature, sunshine, and length of the day. CWB was calculated using meteorological data from 294 weather stations and weather posts across Poland. Spatial data from point measurements were interpolated using the Geographic Information System (GIS) software. Yield forecasts were made for major crops in Poland using agro-meteorological yield models and weather indices (WI). Yield figures were based on data from the Central Statistical Office of Poland (GUS). The autumn of 2011 was the driest in several dozen years in many localities of southeastern Poland. For instance, at the weather station in Puławy, the lowest level of precipitation had been recorded since 1871. Weather conditions prevailing in the growing season of 2012 were very beneficial for winter cereals and winter rapeseed. As for sugar beet, the weather also favored high yields over most of the growing season, except the final stage of growth. Notwithstanding the extreme drought in the autumn of 2011, the good weather conditions in the remaining part of the growth period caused the yields of winter crops and sugar beet to be high. The very scant autumn precipitation, even though it had negative impact on the germination of cereals, seedling emergence, and seedling growth, did not cause any major losses to yields. Water supplies from September precipitation combined with frequent morning mists, fogs, and dew mitigated the impact of prolonged drought and were sufficient to sustain the yields at an acceptable level.

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Estimation of Reference Evapotranspiration using the FAO Penman-Monteith Method for Climatic Conditions of Poland

Cited by 33 publications

References 11 publications

Evaluation of Soil Moisture Variability in Poland from SMOS Satellite Observations

Evaluation of Soil Moisture Variability in Poland from SMOS Satellite Observations

Evapotranspiration data to determine agro-climatic zones in Egypt

Agricultural autumn drought and crop yield in 2011 in Poland

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