Modeling of water and solute movement requires knowledge of the nature of the spatial distribution of transport parameters. Only a few of the field experiments reported in the literature contained enough measurements to discriminate statistically between lognormal and normal distributions. To obtain statistically significant data sets, six field experiments at...
To explain the dynamic behavior of the matric potential at the wetting front of gravity
driven fingers, we take into account the pressure across the interface that is not continuous
and depends on the radius of the meniscus, which is a function of pore size and the dynamic
contact angle...
Full Text:
driven finger flow
TammoS. Steenhuis,1 Christine E. Baver,1 Bahareh Hasanpour,1 Cathelijne R. Stoof,1
To explain the dynamic behavior of the matric potential at the wetting front of gravity
driven fingers, we take into account the pressure across the interface that is not continuous
and depends on the radius of the meniscus, which is a function of pore size and the dynamic
contact angle...
To explain the dynamic behavior of the matric potential at the wetting front of gravity
driven fingers, we take into account the pressure across the interface that is not continuous
and depends on the radius of the meniscus, which is a function of pore size and the dynamic
contact angle...
An exact integral solution for the moisture profile in growing fingers in sandy soil is derived from Richards' equation. The solution provides moisture content along a finger as a function of position and time and provides applicable results, including the calculation of the asymptotic matric potential of a growing finger...
Precise management of the changing matric potential during infiltration into unsaturated soil required the development of miniature, high-speed, planar tensiometers. A novel design was developed, with response time of less than 1 s. The applicability of the devices is shown through measurements of the matric potential in growing instabilities, both...
We explore selected aspects of J.-Y. Parlange’s contributions to hydrological transport of solutes and sediments, including both the laboratory and field scales. At the laboratory scale, he provided numerous approximations for solute transport accounting for effects of boundary conditions, linear and nonlinear reactions, and means to determine relevant parameters. Theory...
Artificial capillary barriers are being used to divert water away from sensitive underground regions. Conversely, funneled flow over natural capillary barriers may increase the danger of groundwater contamination by decreasing the travel time and contact area. There have been relatively few experimental studies of capillary barrier flow patterns. In this...