this river valley will be filled with water

This can be stated in active form. Alternate translation: "I will fill this river valley with water" (See: rc://en/ta/man/jit/figs-activepassive)

you will drink

This refers to drinking the water that Yahweh provides. Alternate translation: "you will drink the water" (See: rc://en/ta/man/jit/figs-explicit)