Homes behind Stockton Levee (image) University of California - Davis Share Print E-Mail Caption Homes behind a levee in Stockton, Calif. UC Davis research shows levees can increase the flood risk of structures behind them. Credit California Department of Water Resources Usage Restrictions Provide credit. 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.