The Master's thesis presents reviews of ten wells on the premises of LTH Trata, which is located east of Škofja Loka on the Sorško polje fields. We have conducted ten infiltration tests using the Hvorslev method and two step infiltration tests for testing the unsaturated zone of the aquifer.
With the infiltration tests by Hvorslev we have analyzed the graph curve of water level fall in the well. The minimum calculated permeability coefficient is 1,9*10-7 m/s, and the maximum 1,6*10-5 m/s.
We have conducted two separate step infiltration tests. During the first test, we faced the issue of lowering pressure in the hydrant network and with measuring the water flux. We have started our second attempt with a low water flux, which we have increased with each consecutive infiltration test. We measured the flow with a discharge meter. We poured water inside the well until seeming stabilization, which was preserved for some time, after which we have ceased adding water and observed water level falling inside the well. Stabilized water levels rise linearly with a starting point at a specific height, since starting pressure is required to generate water flux.
For analysis we have used a graph curve of rise and stabilization, for a logistic curve was calculated by nonlinear correlation and applied. Based on the logistic equation we calculated the velocity and discharge of water level rise during the inflow, giving us also the infiltration flow rate. We noticed a difference in graph curves at the starting phase of inflow. We calculated the volume of the outflow from the infiltration fluxes, which was compared to the calculated volume of a two-year period of extreme precipitation from the synthetic hydrograph at the closest precipitation station (Airport Jože Pučnik Ljubljana). Analyzing the tangent from the acquired synthetic hydrograph data, we were able to calculate the flux. Using the stabilized levels chart we then concluded the height of water rise for our calculated flux. The resulting information enabled us to determine the dimension of the infiltration well.