Coca River Drone Shot (IMAGE) DOE/Oak Ridge National Laboratory Caption Ecuador's Coca River has experienced massive erosion and sedimentation in the last four years since the San Rafael Waterfall collapsed in 2020. Credit Matt Larson, Oak Ridge National Laboratory, US Department of Energy Usage Restrictions n/a License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.