I made my own duel map to get this one. Remember that for Terrace Farm you need a terrain with hills. Aqueducts can also be over the hills.
So I made 3 x hills in one line then 2 mountains on the top and bottom to it. Then during same turn I found 2 cities. Remember aqueducts are attached to the city.
Effect:
https://files.fm/thumb_show.php?i=kn4htd2e6