Badania modelowe strefy aeracji z wykorzystaniem programu Unsat Suite i badań georadarowych

Abstract

Modelling research of the vadose zone using the UnSat Suite program and a ground-penetrating radar.A b s t r a c t. The purpose of this paper was to analyze the effect of detailed recognition and correct mapping of the boundaries between layers of different grain sizes on the results of modelling tests of the vadose zone. The modelling was performed using UnSat Suite software that enables modelling of water permeability and migration of pollutants through the vadose zone using various numerical programs, including VS2DT that was used in this case study. Direct field research, including drilling of boreholes and ground-penetrating radar investigation, has shown a significant variation in lithology of the vadose zone in a small test area located in Włocławek city. Various sand fractions have been found: from fine to coarse sand, with varying filtration parameters and moisture content. Ground-penetrating radar investigations have enabled a more accurate recognition and refinement of geologic structures, particularly in the context of lithological boundaries, including the space between boreholes. The results of the modelling tests conducted in the vadose zone enabled determination of the velocity, time and volume of infiltration water.