Urban Watershed (IMAGE) Virginia Institute of Marine Science Caption The Elizabeth River is one of the most highly developed watersheds in the Chesapeake Bay and U.S.; yet developed surfaces occupy only 16% of the potential marsh-migration area under 1 meter of sea-level rise. Credit David Malmquist/VIMS. Usage Restrictions One-time use only. 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.