closeup of water flowing over a dam illustrating the idea of power and the challenge of managing natural resources

water flow pipe stream liquid cascade current channel hydrology hydraulic aquatic natural flowage runoff splash drain fluid pour gush rushing rush torrent waterfall streamlet rivulet conduit aquifer sewer plumbing engineering construction concrete building material industry structure metal stone iron steel pipework tube metalwork gray blue light day closeup flowing dam illustrating idea power challenge managing resources resources generative