Ключевые слова: backflow, blocked, canal, clogged, construction, control, cover, dam, design, discharge, drain, drainage, emergency, engineering, flood, floodgate, flow, flowing, gate, industrial, industry, infrastructure, level, maintenance, municipal, open, outfall, planning, plugged, prevention, rain, rainfall, reinforced, river, sewage, sewer, spillway, storm, stormwater, stream, structure, stuck, support, system, tide, tunnel, urban, waste, water, waterway,