Analysis of turbulent flow patterns of soil water under field conditions using Burgers equation and porous suction-cup samplers

Su, Ninghu, Watt, Jim P. C., Vincent, Keith W., Close, Murray E., and Mao, Renzhao (2004) Analysis of turbulent flow patterns of soil water under field conditions using Burgers equation and porous suction-cup samplers. Australian Journal of Soil Research, 42 (1). pp. 9-16.

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Abstract

This paper presents results using the Burgers equation in spherical co-ordinates for investigating soil-water dynamics around porous cup samplers under field conditions. The analysis reveals that the yield (V) of the porous suction-cup sampler is a power function of inflow duration (T) and source moisture strength (A). It also shows that the shock front velocity and moving boundary of the front are both power functions of A and time. The analysis further demonstrate that the asymptotic shock front velocity derived from a similarity solution is the same for different versions of Burgers equation indicating the validity of different versions of Burgers equation for the same flow patterns. The observation using time domain reflectometry (TDR) shows that a moisture shock was induced around the sampler following applying vacuum which justifies the application of Burgers equation. The values of A were derived using field data to determine the location and the front velocity of the shock.

Item ID: 8605
Item Type: Article (Refereed Research - C1)
Keywords: soil-water flow; TDR
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ISSN: 1446-568X
Date Deposited: 25 Feb 2010 01:54
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0503 Soil Sciences > 050305 Soil Physics @ 50%
04 EARTH SCIENCES > 0404 Geophysics > 040403 Geophysical Fluid Dynamics @ 50%
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 50%
96 ENVIRONMENT > 9609 Land and Water Management > 960905 Farmland, Arable Cropland and Permanent Cropland Water Management @ 50%
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