The only permanent water source of the city in this period, the monumental Pool of Siloam, is clearly distinguishable in the model. It was fed by waters of the Gihon Spring diverted through Hezekiah's Tunnel, built in the 8th century BC.
Further, the evangelist's account (John 9:7) of the blind man sent by Jesus to wash at the pool of Siloam seems to indicate that it was near the Temple. It was from Siloam that water was brought in a golden vessel to the Temple during the feast of Tabernacles; our Lord probably pointed to it when He stood in the Temple and cried, "If any man is thirsty, let him come to Me and drink" (7:37).