on the grassy shore of the reservoir, a concrete hydraulic structure was built with a valve on a worm mechanism to regulate the wa

waterway transport vehicle bridge river canal track walkway reservoir water railway train channel boat tree sea dock grassy shore concrete hydraulic structure was built valve worm mechanism regulate level far there are city buildings cranes dull buildings city clouds cloudy coastal coastline background structure cranes dam dull fence gate valve grass shore engineering it#39aph39#s raining lake land reclamation lifting mechanism man-made pond manual drive metal metal municipal nature opposite plants railings reed level river safety scenic view tree trees vegetation water reservoir system wave worm-operated