Complex sentence: Tambul guides them to the desert well at Bir Acroma, but it is almost dry, providing only a trickle of water, and the group must delay their departure until they can collect as much as they can.
Split into simpler sentences: Tambul guides them to the desert well at Bir Acroma. They find it, but it is almost dry, providing only a trickle of water, and they must delay their departure until they can collect as much as they can.