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Infiltration rate measurements in arid soils with surface crust

Content Provider	Springer Nature Link
Author	Al Qinna, M. I. Abu Awwad, A. M.
Copyright Year	1998
Abstract	The effects of infiltrometer type and water application rate on infiltration were studied for a crust-forming soil at the University of Jordan Research Station near Al-Muwaqqar village. The total amount of water applied in all cases was 38 mm. The highest infiltration rate values occurred in basin infiltrometers followed by sprinkler and furrow infiltrometers. The infiltration rate at the end of water application decreased significantly by 41–57% with decreasing application rate from 28.4 to 6.2 mm/h regardless of infiltrometer type. Increasing the initial soil moisture content decreased the infiltration rate by about 4–11% in all infiltrometer types and application rates. In the basin infiltrometer, lateral water movement occurred all around the basin borders, thus increasing the measured basic infiltration rate. In the furrow infiltrometer, the formation of a sedimentary crust on the furrow bottom reduced the basic water infiltration rate to 3.6 mm/h. The wetted zone formed with the sprinkler infiltrometer reduced lateral water movement, and the measured basic infiltration rate was close to the basic infiltration rate measured by the double-ring infiltrometer. The measurements were used to establish infiltration rate curves and equations. In a second experiment, the Stirk correction significantly reduced the water lateral divergence factor by 27.1% in single-ring infiltrometers. The Stirk correction factor was different in single- and double-ring infiltrometers. Thus, the basic infiltration rate was 4.8 and 3.5 mm/h using the single and the double infiltrometers, respectively, while the corresponding correction factors were 0.67 and 0.91, respectively. The corrected infiltration rate was only 3.2 mm/h, which confirms the tendency of these crusted soils to generate huge runoff at even small application rates.
Starting Page	83
Ending Page	89
Page Count	7
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	18
Issue Number	2
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-06-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

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