Ключевые слова: anti, background, blue, canal, channel, contaminated, creek, culvert, dirty, discharge, ditch, drain, drainage, ecological, effluent, engineered, environment, environmental, exit, flow, flowing, flush, garbage, industrial, nature, outdoors, outflow, pipe, pollution, polution, river, rust, sanitary, storm, stormwater, stream, toxic, waste, wastewater, water, white,