The wave offering, part of the offerings of the Mosaic Law, was the symbolic act indicating that the offering was for the Lord. Portions of the things offered were literally waved in the air before the Lord.
When Ur was founded, the Persian Gulf’s water level was two-and-a-half metres higher than today. Ur is thought, therefore, to have had marshy surroundings; irrigation would have been unnecessary, and the city’s evident canals likely were used for transportation.