Drainage System (System of the Rivers):

       The glaciers in Pakistan start melting in the summer because of an increase in temperature. The water flowing out from these glaciers from the shape of springs and streams. It finally falls into rivers, because soil erosion of glaciers, many freshwater lakes are formed in the mountain areas of Pakistan. They meet the water needs of the local people.

River Indus:

           River Indus and its tributaries irrigate Pakistan. Originating in the Northern Mountains near the border of China, the Indus River runs a course through Occupied Kashmir and then enters Pakistan at Skardu, flowing through the plains of Punjab and Sindh, it falls into the Arabian Sea at Thatha in Sindh.

Tributaries of River Indus:

        As it flows through its course, it is joined by several rivers, small and large. These are called tributaries of River Indus. The Eastern tributaries include the rivers Jhelum, Chenab, Ravi, and Sutlej. They join the river Indus in the province of Punjab. The Western tributaries include River Panjkora, Swat, Kabul, Kurram, and Tochi etc.