The Occoquan Reservoir (IMAGE) Virginia Tech Caption The Occoquan Reservoir provides freshwater for many in Northern Virginia, but its recent increase in salinization is becoming an urgent problem. Photo by Anthony Wright for Virginia Tech. Credit Credit: Virginia Tech Usage Restrictions Credit: Virginia Tech 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.