Ключевые слова: canal, cement, closeup, concrete, construction, cover, design, dirty, ditch, drain, drainage, dry, edge, effluent, engineering, environment, grate, grid, gutter, hole, industry, kerb, mesh, nobody, outdoor, outdoors, park, pathway, rain, rainwater, road, runoff, sewage, sewer, sewerage, sidewalk, slab, stone, storm, storm drain, stormwater, surface, system, tray, urban, waste, water, waterway, way,