Malir River passes through the city of Karachi from north east to the center and drains into the Arabian Sea. Malir river is one of the two rivers passing through Karachi and the other is Lyari River. Karachi (كراچى) is the largest city in Pakistan and the capital of the province of Sindh. ... Map of the Arabian Sea. ... Karachi (كراچى) is the largest city in Pakistan and the capital of the province of Sindh. ... Lyari River carries the sewerage water of the inhabitant of karachi and drops into Arabian sea. ...