Philip Gassman

Sergey Rabotyagov¹, 

Todd Campbell², 

Adriana Valcu², 

Philip Gassman², 

Manoj Jha³, 

Keith Schilling⁴, 

Calvin Wolter⁴, 

Catherine Kling² 

¹School of Environmental and Forest Sciences, University of Washington, 

²Center for Agricultural and Rural Development, Department of Economics, Iowa State University, 

³Department of Civil, Architectural, and Environmental Engineering, North Carolina A&T University, 

⁴, Iowa Geological and Water Survey