Within Pakistan, the Gomal river surrounds South Waziristan agency, forms the boundary between Khyber Pakhtunkhwa and Balochistan. From South Waziristan, the river enters the Gomal Valley in Tank District at a place known as Girdavi, Murtuza which is inhabited by the Miani tribe. It is mainly here that the water of Gomal is used to cultivate the lands in Gomal Valley through Zam system (Rod Kohi). The river passes then through the Damaan plain in Kulachi Tehsil and later on through Dera Ismail Khan Tehsil, It then joins the Indus River 20 miles south of Dera Ismail Khan