Pathways (image) The Earth Institute at Columbia University Share Print E-Mail Caption This illustration shows where water pools in winter and how it flows during the melt season. Credit Winnie Chu Usage Restrictions Credit must be given. 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.