Temat: precipitation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Results of water balance measurements in a sandy and silty-loam soil profile using lysimeters
Autorzy:: Tall, Andrej
Pavelková, Dana
Powiązania:: https://bibliotekanauki.pl/articles/292535.pdf
Data publikacji:: 2020
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: evapotranspiration
lysimeter study
precipitation
water balance
Opis:: Lysimeters represent the ideal tool for direct measurement of soil water balance components in soil profiles. Changes in the water content in a soil monolith can be measured with sufficient accuracy by the precise lysimeter weighing system. Water content changes in soil monolith as derived from lysimeter mass represent one of the basic water balance component. This paper deals with the development and comparison of individual soil water balance components in two different soil profiles from the Easter-Slovakian-Lowland. Two lysimeter vessels were filled monolithically with two different soil profiles covered with grass: one sandy soil profile from locality Poľany and one silty-loam soil profile from locality Vysoká nad Uhom. A constant groundwater level of 1 m below ground level was maintained in both soil profiles. Under the same meteorological conditions, all differences in the development of water balance components were caused only by the differences in soil profiles. The actual evapotranspiration and water flows at the bottom of the soil profiles were compared. Sandy soils are generally considered to be more prone to drought than silty-loam soils. Under the specific conditions of this experiment (maintaining a constant groundwater level) the opposite was shown, when the silty-loam soil profile was more prone to drought than sandy soil profile. Sandy soil profile from Poľany reacted more quickly to precipitation (or evaporation). Due to the higher hydraulic conductivity of the sandy soil compared to the silty-loamy soil, the groundwater level response to external stimuli was much faster.
Źródło:: Journal of Water and Land Development; 2020, 45; 179-184
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Machine learning for supporting irrigation decisions based on climatic water balance
Autorzy:: Treder, Waldemar
Klamkowski, Krzysztof
Wójcik, Katarzyna
Tryngiel-Gać, Anna
Powiązania:: https://bibliotekanauki.pl/articles/27312625.pdf
Data publikacji:: 2023
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: apple tree
evapotranspiration
irrigation scheduling
machine learning
precipitation
WEKA software
Opis:: A machine learning model was developed to support irrigation decisions. The field research was conducted on ‘Gala’ apple trees. For each week during the growing seasons (2009-2013), the following parameters were determined: precipitation, evapotranspiration (Penman-Monteith formula), crop (apple) evapotranspiration, climatic water balance, crop (apple) water balance (AWB), cumulative climatic water balance (determined weekly, ∑CWB), cumulative apple water balance (∑AWB), week number from full bloom, and nominal classification variable: irrigation, no irrigation. Statistical analyses were performed with the use of the WEKA 3.9 application software. The attribute evaluator was performed using Correlation Attribute Eval with the Ranker Search Method. Due to its highest accuracy, the final analyses were performed using the WEKA classifier package with the J48graft algorithm. For each of the analysed growing seasons, different correlations were found between the water balance determined for apple trees and the actual water balance of the soil layer (10-30 cm). The model made correct decisions in 76.7% of the instances when watering was needed and in 87.7% of the instances when watering was not needed. The root of the classification tree was the AWB determined for individual weeks of the growing season. The high places in the tree hierarchy were occupied by the nodes defining the elapsed time of the growing season, the values of ∑CWB and ∑AWB.
Źródło:: Journal of Water and Land Development; 2023, 58; 25--30
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Impact of the projected climate change on soybean water needs in the Kuyavia region in Poland
Autorzy:: Kasperska-Wołowicz, Wiesława
Rolbiecki, Stanisław
Sadan, Hicran A.
Rolbiecki, Roman
Jagosz, Barbara
Stachowski, Piotr
Liberacki, Daniel
Bolewski, Tymoteusz
Prus, Piotr
Pal-Fam, Ferenc
Powiązania:: https://bibliotekanauki.pl/articles/2048516.pdf
Data publikacji:: 2021
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: climate change scenario
crop water needs
evapotranspiration
Glycine max L. Merrill
irrigation
precipitation
protein crops
Opis:: According to the SRES A1B climate change scenario, by the end of the 21st century temperature in Poland will increase by 2–4°C, no increase in precipitation totals is predicted. This will rise crop irrigation needs and necessity to develop irrigation systems. Due to increase in temperature and needs of sustainable agriculture development some changes in crop growing structure will occur. An increase interest in high protein crops cultivation has been noted last years and further extension of these acreage is foreseen. Identifying the future water needs of these plants is crucial for planning and implementing sustainable agricultural production. In the study, the impact of projected air temperaturę changes on soybean water needs, one of the most valuable high-protein crops, in 2021-2050 in the Kuyavia region in Poland was analysed. The calculations based on meteorological data collected in 1981-2010 were considered as the reference period. Potential evapotranspiration was adopted as a measure of crop water requirements. The potential evapotranspiration was estimated using the Penman–Monteith method and crop coefficient. Based on these estimations, it was found that in the forecast years the soybean water needs will increase by 5% in the growing period (from 21 April to 10 September), and by 8% in June-August. The highest monthly soybean water needs increase (by 15%) may occur in August. The predicted climate changes and the increase in the arable crops water requirements, may contribute to an increase in the irrigated area in the Kuyavia region and necessity of rational management of water resources.
Źródło:: Journal of Water and Land Development; 2021, 51; 199-207
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Variability of the water availability in a river lake system – A case study of Lake Symsar
Zmienność dostępności wody w systemie rzeczno-jeziornym – jezioro Symsar
Autorzy:: Kuriata-Potasznik, A. B.
Szymczyk, S.
Powiązania:: https://bibliotekanauki.pl/articles/292461.pdf
Data publikacji:: 2016
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: evapotranspiration
hydrological condition
meteorological condition
precipitation
river-lake system
opad atmosferyczny
parowanie terenowe
system rzeczno-jeziorny
warunki hydrologiczne
warunki meteorologiczne
Opis:: It is predicted that climate change will result in the diminution of water resources available both on global and regional scales. Local climate change is harder to observe and therefore, while counteracting its effects, it seems advisable to undertake studies on pertinent regional and local conditions. In this research, our aim was to assess the impact of a river and its catchment on fluctuations in the water availability in a natural lake which belongs to a post-glacial river and lake system. River and lake systems behave most often like a single interacting hydrological unit, and the intensity of water exchange in these systems is quite high, which may cause temporary water losses. This study showed that water in the analyzed river and lake system was exchanged approx. every 66 days, which resulted from the total (horizontal and vertical) water exchange. Also, the management of a catchment area seems to play a crucial role in the local water availability, as demonstrated by this research, where water retention was favoured by wooded and marshy areas. More intensive water retention was observed in a catchment dominated by forests, pastures and wetlands. Wasteland and large differences in the land elevation in the tested catchment are unfavourable to water retention because they intensify soil evaporation and accelerate the water run-off outside of the catchment. Among the actions which should be undertaken in order to counteract water deficiencies in catchment areas, rational use and management of the land resources in the catchment are most often mentioned.
Przewiduje się, że zmiany klimatyczne doprowadzą do zmniejszenia zasobów wodnych zarówno w skali globalnej, jak i regionalnej. Lokalne zmiany klimatu są trudniejsze do zaobserwowania i dlatego, aby przeciwdziałać ich skutkom, wskazane wydaje się podjęcie wszelkich badań nad warunkami regionalnymi oraz lokalnymi. Celem prezentowanych badań była ocena wpływu rzeki oraz jej zlewni na zmienność dostępności wody w naturalnym jeziorze należącym do polodowcowego systemu rzeczno-jeziornego. Systemy rzeczno-jeziorne zachowują się najczęściej jak jedna, interakcyjna jednostka hydrologiczna, a intensywność wymiany wody w tych systemach jest dość duża, co może powodować chwilowe ubytki wody. W wyniku badań stwierdzono, że woda w analizowanym systemie była wymieniana co ok. 66 dni, co wynikało z całkowitej (poziomej i pionowej) wymiany wody. Również zarządzanie zlewnią wydaje się odgrywać kluczową rolę w lokalnej dostępności wody; w niniejszych badaniach obszary leśne i bagienne sprzyjały zatrzymywaniu wody. W zlewni, w której dominowały lasy, pastwiska i tereny podmokłe, obserwowana była intensywniejsza retencja wody. Występowanie nieużytków i dużych deniwelacji terenu w badanej zlewni nie sprzyjało retencji wody, ponieważ intensyfikowało parowanie gleby i przyspieszało odpływ wody poza zlewnię. Wśród działań, które powinny zostać podjęte w celu przeciwdziałania stratom wody w zlewniach, najczęściej wymienia się racjonalne wykorzystanie i zarządzanie zasobami gruntów w zlewni.
Źródło:: Journal of Water and Land Development; 2016, 31; 87-96
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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