On the west, Badakshan is bounded by a line which crosses the Turkestan plains southwards from the junction of the Kunduz and Oxus rivers till it touches the eastern waterdivide of the Tashkurghan river (here called the Koh-i-Chungar), and then runs south-east, crossing the Sarkhab affluent of the Khanabad (Kunduz), till it strikes the Hindu Kush.
About Faizabad, in the centre of Badakshan, but tailing off to iioo at Kunduz, in Kataghan, where it merges into the flat plains bordering the Oxus.
The Kokcha river traverses Badakshan from south-east to north-west, and, with the Kunduz, drains all the northern slopes.
Like the Kunduz, it probably drains the northern slopes of the Hindu Kush by deep lateral valleys, more or less parallel to the crest, reaching westwards towards the Khawak pass.
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