CASTOR, S. E. O.; CASTOR, Sérgio Emiliano de Oliveira.
Abstract:
This study focuses its attention on the behavior of
water in porous media in saturated and unsaturated zones, analyze its parameters, and observe them from the angle of applications
in Supply Engineering and Agronomy.
The study was developed in a laboratory using an acrylic model capable of simulating field conditions, where they were used
three types of sand with different granulometry allowing the establishment of a scale ratio for comparison.
The specific physical parameters of each sand, such as diffusibility, permeability and capillary tension, were
finished experimentally by apparatus and equipment developed in the laboratory itself when standard equipment
were not available.
Scale ratios were established for both regimes considered to simulate uni and bidimensional situations.
Logarithmic and exponential equations were derived to describe the aquifer recharge, with
determine the position and humidity of the border over time.
The velocities of entry into the vertical infiltration were
determined using the permeability variation principle
between two layers.
The effects of trapped air and its distortions on moisture distribution were analyzed.
The hysteresis phenomenon in fine sands was taken into account.
The established scale ratios and the derived equations allowed the prediction of wet and saturated boundaries
and describe the change in humidity over time and space for
application in engineering and agronomy to better take advantage
in water resource planning projects in general
Hence the physical characteristics of a given data are identified
our study provides conditions to predict in the field the position of wet borders in a given recharge time,
as well as predict the humidity at each point, and extrapolate the time
of aquifer recharge.
