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Some properties of Dagan’s method for drain spacing determination in marshy - gley soil

Neke osobine metode Dagana za određivanje rastojanja između drenova na močvarno-glejnom zemljištu

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2003
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Djurović, Nevenka
Stričević, Ružica
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Abstract
Dagan’s method as well as Kirkham’s one belong to the group of methods for drain spacing determination in steady state water flow conditions. Both methods are based on the assumption that drainage spacing (L) is linear function of water table depth and drainage discharge (h/q). The only difference can be distinguished in the values of coefficients. To dry out eugley type of soil, drain spacing is better determined by Dagan’s method in all treatments, as compared with Kirkham’s one. Advantage of this method is especially marked on the drainage system with narrower drain spacing.
Metod Dagan-a, kao i metod Kirkham-a spada u metode za određivanje rastojanja između drenova u uslovima stacionarnog režima filtaracije. Obe ove metode zavisnost rastojanja između drenova, dubine podzemne vode i drenažnog isticanja prikazuju kao linearnu, pri čemu se razlikuju samo vrednosti koeficijenata. I jedna i druga metoda pokazuju tačnije procene u uslovima većih dubinama podzemnih voda. Pri određivanju rastojanja između drenova u uslovima odvodnjavanja močvarno-glejnog zemljišta metoda Dagana pokazala je bolje rezultate na svim varijantama ogleda. Prednosti metode Dagana se pokazuju kroz manje vrednosti srednje greške procene, medijane i mode greške. Prednosti metode Dagan-a naročito su izražene na drenažnom sistemu sa manjim rastojanjem između drenova.
Keywords:
steady state water flow / drain spacing / Dagan’s method
Source:
Journal of Agricultural Sciences (Belgrade), 2003, 48, 1, 69-75
Publisher:
  • Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd

DOI: 10.2298/JAS0301069D

ISSN: 1450-8109

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http://aspace.agrif.bg.ac.rs/handle/123456789/552
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