The River Adivian is a crucial regional resource for trade and transportation in south-central Cheliax, though rapids and signifigant waterfalls marr the route and make the river currently impassable to vessels with a deep draft. Despite these hazards, the river remains one of the primary means of transportation between the city of Westcrown near its mouth on the Inner Sea and the capital at Egorian on the banks of Lake Sorrow.