effect of slope on soil wetting pattern under surface drip irrigation and simulation hydrus-2d model

نویسندگان

زینب حیدری

دانشجوی کارشناسی ارشد آبیاری و زهکشی، دانشکدۀ کشاورزی دانشگاه رازی، کرمانشاه، ایران معصومه فراستی

استادیار گروه مهندسی آب، دانشکدۀ کشاورزی دانشگاه رازی، کرمانشاه، ایران , استادیار دانشکدۀ کشاورزی، دانشگاه گنبدکاووس، گنبد، ایران رسول قبادیان

دانشیار گروه مهندسی آب، دانشکدۀ کشاورزی دانشگاه رازی، کرمانشاه، ایران

چکیده

in this study, effect of slope on soil wetting pattern under surface drip irrigation and simulation with hydrus-2d model evaluated.the physical model made of plexiglas to size 83, 6 and 54 cm (length, width, height) filled with silty clay loam soil was used. to achieve the desired discharge, a small drip irrigation system created that includes a water tank with a fixed height (about 2 meters), a emitters regulated manually, and pipe transferring the water to emitters. discharge was 4 l/hr and the slopes of selective were 0, 5, 15 and 25 percent. irrigation time for each test was fixed and 2 hours. readings of wet pattern was performed until 24 hours after irrigation and fixed wetting pattern. hydrus-2d model was simulation selection model. to determine soil hydraulic parameters rosetta model used. for the maximum wet depth and maximum wet width obtained rmse value between 1.44-3.4% that shows the error is low. the results showed that hydrus-2d model have high ability to simulate the wetting pattern flat and slope lands.

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عنوان ژورنال:
مدیریت آب و آبیاری

جلد ۵، شماره ۲، صفحات ۲۷۷-۲۸۸

کلمات کلیدی
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