Chaj Doab
Chaj Doab, also known as the Jech Doab, is one of the main regions of the Punjab province in Pakistan. Punjab historically has been divided into regions based on its various rivers, since the name Punjab itself is based on the region's five main rivers. The Chaj Doab includes the area between the Jhelum and Chenab rivers, thus also known as Jech Doab. It lies on the southern fringes of the Kashmir valley. The Chaj Doab is smaller in area compared to the other doabs, such as the Rechna, and it has a moderately high population density. Its principal city is Sargodha.