Ключевые слова: abutments, architecture, artificial, bierzo, cascade, cataract, construction, course, dam, ditching, drought, evacuation, explosion, fail, floods, flow, flowing, fluid, force, gate, gravity curve, hydrographic, irrigation, jet, liquid, nature, open, pearrubia, pond, power, reservoir, river, sil, slopes, spans, spillway, structure, supply, swamp, weir,