Hanadi Rifai, University of Houston (IMAGE) University of Houston Caption Hanadi Rifai, professor of civil and environmental engineering and director of the environmental engineering graduate program at the University of Houston, will characterize the chemical and microbiological contamination in Houston waterways after Harvey. Credit University of Houston Usage Restrictions None 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.