Theoretical analysis of the irrigation of soils with various structures

• Autorzy: Kuczuk A. , Pospolita J.

Warianty tytułu

PL

Teoretyczna analiza nawadniania gleb o różnych strukturach

• Języki publikacji: EN

Abstrakty

EN

This paper reports the results of research into water flow in three various soil types. Soil data were obtained on the basis of a classification by Wösten and van Genuchten [38]. The mathematical model of water flow in soil was formulated using Richards’ equation. The data for hydraulic conductivity and suction pressure of unsaturated soil were obtained using the van Genuchten model. The method of finite difference and an original calculation program were applied to solve equations. The time of water transfer through soil and depth of groundwater enabling water transport to root-zone were studied. These phenomena were examined for different boundary conditions. The unsteady character of irrigation process was analyzed. Water flow in soil following short-term and intense precipitation was one of analyzed problems.

PL

W artykule zaprezentowano wyniki badań dotyczących przepływu wody w trzech różnych typach gleb. Dane dotyczące badanych gleb uzyskano na podstawie publikacji Wöstena i van Genuchtena [39]. Matematyczny model przepływu wody został sformułowany przy wykorzystaniu równania Richardsa. Dane dla przewodności hydraulicznej oraz ciśnienia ssącego gleby nienasyconej otrzymano wykorzystując model van Genuchtena. W celu rozwiązania równania Richardsa wykorzystano metodę różnic skończonych przy zastosowaniu oryginalnego programu obliczeniowego. Zbadano czas przepływu wody przez glebę oraz głębokość wody gruntowej pozwalających na transport wody do strefy korzeni. Zjawiska te zostały zbadane dla różnych warunków brzegowych. Poddano analizie nieustalony charakter procesu nawadniania. Ponadto jednym z problemów poddanych analizie był przepływ wody w glebie po krótkotrwałych i intensywnych opadach.

Słowa kluczowe

EN

irrigation; numerical calculations; Richards' equation; water; soil

PL

nawadnianie; obliczenia numeryczne; równanie Richardsa; woda; gleba

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Journal of Research and Applications in Agricultural Engineering
• Rocznik: 2016
• Tom: Vol. 61, nr 4
• Strony: 15--22
• Opis fizyczny: Bibliogr. 38 poz., tab., wykr.

Twórcy

autor

Kuczuk A.

• Opole University of Technology, Department of Thermal Engineering and Industrial Facilities

autor

Pospolita J.

• Opole University of Technology, Department of Thermal Engineering and Industrial Facilities

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.