Ключевые слова: autumn, balkans, bulgaria, canyon, cascade, dam, devin, engineering, environment, europe, fall, forest, geological, gorge, hill, hydro, hydroelectricity, krichim, krichim reservoir, landmark, landscape, leisure, meadow, meander, mountain, natural, nature, panorama, peninsula, plovdiv region, power, reservoir, resource, rhodope, rhodopes, river, rodopi, scenery, scenics, summer, terrain, tourism, travel, tree, vacha, vacha reservoir, vacha river, view, water, wilderness,