'Trench' in the Bible

With them, he built an altar in the name of Yahweh, and he made a trench {which would have held} about two seahs of seed, all around the altar.

The water went all around the altar, and the trench also was filled [with] water.

Then the fire of Yahweh fell, and it consumed the burnt offering, and the wood, and the stones, and the dust; and the water which [was] in the trench it licked up!