River Fieldwork (IMAGE) American Society of Agronomy Caption The automated dataloggers can be used for long-term monitoring, as well as for temporary monitoring used to estimate stream flow, as seen in this photo from the Potrero River, Costa Rica. Credit Photo credit Silja Hund. Usage Restrictions Please use with story only 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.