U prvom dijelu ovoga rada je prikazano dimenzioniranje vodoopskrbnog sustava koji će vodu dovodit do pet naselja koja se nalaze na jugozapadnom dijelu otoka Brača. U drugom dijelu rada ćemo razmatrati buduće proširenje postojećeg vodoopskrbnog sustava uslijed povećanja potrebnih količina vode.The first part of this thesis shows the dimensioning of the water supply system that will lead to five settlements located in the southwestern part of the island of Brac. In the second part of the thesis we will consider the future expansion of the existing water supply system due to the increase in the required quantities of water