Ключевые слова: architecture, barrier, building, canal, cascade, concrete, conservation, construction, dam, day, drop, energy, engineering, flood, flow, flowing, gate, gorges, history, hydro, hydroelectric, hydropower, industry, lock, obsolete, old, outdoors, overflow, past, power, regulate, reservoir, river, sluice, small, station, stone, stream, structure, surface, technology, wall, water, waterfall, watergate, weir,