NOVELTY - A perpendicular circulation system of seawater (10) in the coast has an artificial structure (12) provided along the coastline. The perpendicular circulation system of seawater has a waste-heat supply line (16), a heat-source installation (14), a pump (18), an energy conversion apparatus and a water-drainage line. The waste-heat supply line receives supply of waste heat from a heat-source installation of vicinity. The energy conversion apparatus converts heat energy of the waste heat received from the waste-heat supply line into the driving force of the pump.    USE - Perpendicular circulation system of seawater in coast such as port and harbor, canal of lakes and marshes, dam, canal and castle.    ADVANTAGE - The perpendicular circulation system of seawater is economical, and improves sediment and water quality environment of the coast.    DETAILED DESCRIPTION - A perpendicular circulation system of seawater in the coast has an artificial structure provided along the coastline. The perpendicular circulation system of seawater has a waste-heat supply line, a heat-source installation, a pump, an energy conversion apparatus and a water-drainage line. The waste-heat supply line receives supply of waste heat from a heat-source installation of vicinity. The pump pumps up seawater. The energy conversion apparatus converts heat energy of the waste heat received from the waste-heat supply line into the driving force of the pump, and is installed ashore. The water-drainage line returned to underwater extends the seawater pumped up from the land with the pump through the water intake line and the water intake line of seawater to underwater. The front-end of the water-drainage line extends to the vicinity of sea bottom, and the end opening keeps the distance of the artificial structure and more than fixed level, and is arranged opposite to the artificial structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the perpendicular circulation system of seawater.    Perpendicular circulation system of seawater (10)    Artificial structure (12)    Heat-source installation (14)    Waste-heat supply line (16)    Pump (18)