Pakistan constructed ___ canals under the Indus Basin treaty .

Pakistan constructed eight inter-river link canals under the Indus Basin Replacement Works, which were implemented after the 1960 Indus Waters Treaty to replace the water it lost from the eastern rivers. These link canals connect the western rivers (Indus, Jhelum, and Chenab) to the eastern ones to allow Pakistan to utilize its allocated waters for irrigation. The Indus Basin Irrigation System, one of the world's largest, also includes numerous other major and minor canals.