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Drainage outflow in different pipe‐drainage variants on gleyic podzoluvisol in the Sava River Valley
Author(s) -
Petošić D.,
Tadić L.,
Romić D.,
Tomić F.
Publication year - 2004
Publication title -
irrigation and drainage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 38
eISSN - 1531-0361
pISSN - 1531-0353
DOI - 10.1002/ird.111
Subject(s) - drainage , outflow , hydrology (agriculture) , geology , drainage system (geomorphology) , geotechnical engineering , biology , ecology , oceanography
Five‐year investigations (1995–99) were carried out on the experimental drainage field “Jelenscak”, Kutina, in Croatia. The field is situated in the Sava River valley, on gleyic podzoluvisol. The trial involved eight pipe‐drainage variants, differing in drainpipe spacing and backfilling. Drainpipe spacings of 15, 20, 25 and 30 m with gravel backfill and spacings of 10, 15, 20 and 25 m without gravel backfill were tested. The shortest duration of drainage outflow was recorded in the variant with a drainpipe spacing of 15 m with gravel backfill and in the variant with a drainpipe spacing of 10 m without gravel backfill. These values are significantly different ( P <0.01) compared to the values obtained in other variants. Average monthly drainage outflows in the said two drainage variants are also significantly higher compared to the other test variants ( P <0.01). The outflow peak in the studied variants ranged from 12.3 mm d −1 up to 64.9 mm d −1 . Drainage outflows during the four‐year period (1996–99), calculated using the numerical model SWAP‐93, were confirmed by direct measurements on the trial field with 95.8% precision. Copyright © 2004 John Wiley & Sons, Ltd.