Some writers say that the fila is a discharge, an abstract measurement referring to a quantity of water that is verified physically in the headgates. That is to say, it is the volume of water that passes through each of the holes or gates during a certain period of time. However, in the case of the irrigation system in La Safor, the fila is also a physical, material component of the network, i.e. a secondary channel or flume that branches off the main channel. Thus we can see how, after leaving the Casa Fosca headgate, the Rebollet acequia carves out an opening or entrance in one of the banks to divert the water to another smaller channel – known as a branch or flume – which, at the same time, will also allow it to be taken to a specific area, supplying water in this case to the whole perimeter of the Catorzena countryside.