The Columbia Encyclopedia, Sixth Edition. 2001-07.
Diyala
(dy´l, –´) (KEY) , river, c.275 mi (440 km) long, rising as the Sirvan River in NW Iran and flowing SW through the Zagros Mts. into E Iraq, where it enters the Tigris River S of Baghdad. The Diyala is unnavigable, but its valley is an important trade route between Iran and Iraq. A dam on the lower Diyala provides flood control and irrigates the area NE of Baghdad.
y
´l
) (KEY) , river, c.275 mi (440 km) long, rising as the Sirvan River in NW Iran and flowing SW through the Zagros Mts. into E Iraq, where it enters the Tigris River S of Baghdad. The Diyala is unnavigable, but its valley is an important trade route between Iran and Iraq. A dam on the lower Diyala provides flood control and irrigates the area NE of Baghdad.
