Trogondic River

The Trogondic River is the fourth largest river in the world and the third largest by outflow. Its headwaters flow from Lake Adau in the Talas Highlands down to Wyde Bay. It is an important waterway contained entriely within the Kingdom of Talas, which tightly controls all trade between Lake Adau and Wyde Bay.
The Great Flood
The Trogondic River was formed when Lake Adau broke its banks on the 4th of Autumn in the year 2124. The ensuing flood carved the Trogondic Gorge through the boreal Talas Highlands, which remains the deepest canyon in the world. The floodwaters met up with the Veza River on the morning of Autumn 5th, deepening it and forever altering its course. Countless lives were lost, and several riverside settlements were washed completely away by the deluge. The portion of the Veza downstream of the confluence was soon after renamed to the Trogondic, highlighting the profound effect the disgorgement had on the old river.