The Aceh River on the island of Sumatra in Indonesia flows from mountains that include the 2,780-metre high Mount Peuët Sagoë for some 200 kilometres northeastward to reach the junction of the Indian Ocean and the Andaman Sea at Banda Aceh, the capital of Indonesia's westernmost Aceh province. The river has a catchment area of som…The Aceh River on the island of Sumatra in Indonesia flows from mountains that include the 2,780-metre high Mount Peuët Sagoë for some 200 kilometres northeastward to reach the junction of the Indian Ocean and the Andaman Sea at Banda Aceh, the capital of Indonesia's westernmost Aceh province. The river has a catchment area of some 1775 square kilometres.