Mothers and fathers refers to a bigger group under which an object falls. Such as, theAconcagua mountain page has the 'Aconcagua Group' as well as the '7 Summits' asparents which is a parent itself to many routes, photos, and Trip Reports. Preljevi i ispusti visokih brana mogu biti na samoj brani ili izvan nje. Nasute brane ne dopuštaju preljev