Location of trash racks on underground pressure conduits of hydroelectric stations

1. Unsubmerged tower intakes with their large height are complex in design, especially in seismic regions, and are labor-intensive in their construction and operation. 2. Submerged tower intakes are less labor-intensive and are sufficiently reliable in the case of a low rubbish content of the reservoir. 3. Bank intakes with their large depths are insufficiently reliable owing to the impossibility of using known trash-cleaning devices, and also due to the fact that the rubbish striking the inclined rack cannot slide down or be thrown off by the opposite pressure occurring upon a change in the load on the unit. 4. The underground location of trash racks with hydraulic flushing is the most promising in the case of a deep headwater tunnel.