Determination of water flow in hillslope soil using wick lysimeters

Tok vode i transport otopljenih tvari u tlu ovisi o hidrauličkim svojstvima tla koja su podložna pedološkim prostorno-vremenskim promjenama. Uz navedeno, nagib terena i obrada tla uvelike utječu na distribuciju vode u nesaturiranoj zoni tla i procjeđivanje. U ovom radu, u sklopu SUPREHILL projekta koristili smo tlačne lizimetre kako bi odredili razlike u volumenu procjedne vode s obzirom na poziciju na padini (vrh, sredina ili dno padine) te između reda i međurednog prostora. Očitanja su provedena u razdoblju od 7. prosinca 2020. do 26. veljače 2021. Statistički značajna razlika u volumenu procjedne vode s obzirom na poziciju lizimetra na padini - vrh, sredina ili dno padine, utvrđena je za one lizimetre koji su postavljeni u redu vinograda (red s trsovima vinove loze), dok za one koji su postavljeni u međuredu vinograda nije bilo značajne razlike u volumenu procjedne vode. Najveći volumen procjedne vode izmjeren je na vrhu reda, dok je najmanji zabilježen na sredini reda vinograda.Soil water flow and solute transport depend on soil hydraulic properties influenced by pedological spatio-temporal changes. Slope of terrain and tillage practices also affect distribution and drainage of water in the unsaturated soil. In this work, as a part of the SUPERHILL project, wick lysimeters placed on the top, middle and bottom of the slope were used to determine the difference in leachate volume with respect to the position on the slope, and to the interrow and row space. Leachate volume measurements were conducted from December 7, 2020 until February 26, 2021. Statistically significant difference in the leachate volume with respect to the lysimeter position on the slope - top, middle or the bottom, was determined for lysimeters placed at vineyard rows, while no significant difference was found for lysimeters placed at the interrow. The highest leachate volume was measured at the top of the row, while the lowest volume was recorded at the middle of the vineyard row