Funnel and Dye (image) American Society of Agronomy Share Print E-Mail Caption Dye is poured into a subsurface well to trace the movement of water during snowmelt. Although the dye barely seems noticeable, its footprint will be visible during lab analysis. Credit Halya Petzold Usage Restrictions Please use with story only. Share Print E-Mail 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.