NET
18 I will make streams flow down the slopes and produce springs in the middle of the valleys. I will turn the wilderness into a pool of water and the arid land into springs.
Darby
18 I will open rivers on the bare heights, and fountains in the midst of the valleys; I will make the wilderness into a pool of water, and the dry land into water-springs.
KJV
18 I will open rivers in high places, and fountains in the midst of the valleys: I will make the wilderness a pool of water, and the dry land springs of water.