Rainfall Simulator (IMAGE) University of Wyoming Caption University of Wyoming researchers (from left) Mario Bretfeld, Yanyan Cheng and Fred Ogden perform a rainfall simulator experiment Dec. 1, 2016, to measure the effect of silvopastoral (wood pasture) land management in the Panama Canal Watershed on infiltration of rainfall. Credit Emily Purvis Usage Restrictions None License Licensed 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.