Abstract: The invention relates to a tarpaulin (10) with (a) a water-repellent textile or film element (14), (b) a plurality of pylons (16) that are fastened to the textile or foil element (14), and (c) at least one thread (18) which is held resiliently taut by the pylons (16).

Abstract: The disclosure relates to a method and an apparatus for separating particles suspended in a flowing liquid for cleaning a current component. The apparatus has a body that can be submerged below the surface of the flowing liquid. The body is hollow and has at least one outlet for the liquid to exit or be removed through, its upstream end is connected to its downstream end by an essentially smooth shaft, the downstream end is to some extent surrounded by a series of baffles, having a gap between each baffle and there are intakes into the body in the shaft between the baffles. The flow is diverted and reversed below the surface of the fluid such as to produce a zone of turbulence around an extensively quiescent center, whereby the turbulence allows the heavier and more inert particles to travel on, while a current component of lighter-weight molecules with few or no particles and accordingly cleaner continuously enters the quiescent center, where it can be analyzed or continuously extracted outside the system.