Irrigation

The Kyichu River flowing to the north of Ganden Monastery. They've managed to fan that bad boy quite a bit over the centuries, as it is the primary source of irrigation in the otherwise fairly arid highlands in Central Tibet. Regional divides on the plateau are fairly pronounced, something which serves to keep the Tibetans all nice and divided.

Kyichu River view from Ganden Monastery, east of Lhasa, Tibetan Autonomous Region, PRC