Qom salt lake basin

This basin area is 89,650 km2 and surface water empty to Qom salt lake. Some rivers flow to Hozsoltan and Meghan desert or south of Qazvin plane.  Jajrod, Karaj, Gharachai and  Ghomrod are in this basin. Water supply increases at spring and decreases at summer. There are 6 rivers this basin which watershed is more than 1000 Km2.