With the exception of the Kunhar river, which flows down the Kagan valley to the Jhelum, the whole drainage of the province eventually finds its way into the Indus.
The Jhelum canal was opened on the 30th of October 1901.
Crossing the Hydaspes (Jhelum) he defeated Porus in a great battle, and crossing the Acesines (Chenab) near the foot of the hills and the Hydraotes (Ravi), reached the Hyphasis (Beas).
Here he was obliged by the temper of his army to retrace his steps, and retreat to the Jhelum, whence he sailed down the river to its confluence with the Indus, and thence to Patala, probably the modern Hyderabad.
On the next occasion (1005) Mahmud advanced, as far as Bhera on the Jhelum, when his adversary Anang-pal, son and successor of Jaipal, fled to Kashmir.