U okviru diplomskog rada provjerena je funkcionalnost prethodno projektiranog podmorskog isputa uređaja za pročišćavanje otpadnih voda, na različite varijante i veličine dotoka otpadne vode. Zadatak je riješen uporabom programa koji je izrađen programskim jezikom FORTRAN 95. Rezultati proračuna prikazani su grafičkim putem uz pomoć Microsoft Excela.Within the framework of the thesis, the functionality of the previously designed submarine outlet of the waste water treatment device was checked, for different variants and sizes of the waste water inflow. The task was solved using a program created in the FORTRAN 95 programming language. The calculation results were presented graphically with the help of Microsoft Excel