Dry Retention Basin (IMAGE) Penn State Caption A dry detention basin next to a road to collect runoff, prevent flooding and perhaps control nitrate infiltration of groundwater. Credit Lauren E. McPhillips, Penn State Usage Restrictions non commercial use 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.