William Raseman
Hydrology, Water Resources & Environmental Fluid Mechanics

Billy Raseman defended his PhD dissertation in May 2019. In Billy's thesis, he researched and developed modeling and optimization techniques to make drinking water treatment safer, more resilient, and cost-effective. His work is motivated by the increasing strain on the water sector due to population growth, aging infrastructure, climate change, and stringent regulations. Specifically, Billy developed a decision support tool that combines advances in stochastic water quality, water treatment modeling, multi-objective optimization, and visual analytics, to enhance treatment operations. In the process, Billy contributed to the USEPA Water Treatment Plant Model and managed the development of Parasol--an open source, interactive visualization library for multi-objective decision-making. Before coming to CU, he earned the BS in Civil Engineering from Notre Dame in 2014. Afterwards, he served as the Country Director of SPOUTS of Water–a social enterprise which manufactures affordable, household water filters in Uganda. In his spare time, he enjoys running, rock climbing, singing, and playing guitar.


  1. Raseman, WJ, J Jacobson, JR Kasprzyk. 2019. “Parasol: An open source, interactive parallel coordinates library for multi-objective decision makingEnvironmental Modelling and Software. vol 116: 153-163. 
  2. Clarkin, TJ, WJ Raseman, JR Kasprzyk, JD Herman. 2018. "Diagnostic Assessment of Preference Constraints for Simulation Optimization in Water ResourcesJournal of Water Resources Planning and Management. vol 144, no 8.
  3. Stewart, JR, B Livneh, JR Kasprzyk, B Rajagopalan, JT Minear, WJ Raseman. 2017. “A multi-algorithm approach to land surface modeling of suspended sediment in the Colorado Front Range” Journal of Advances in Modeling Earth Systems. vol 9, no 7: 2526-2644.
  4. Raseman, WJ, JR Kasprzyk, FL Rosario-Ortiz, J Stewart, B Livneh. 2016. “A critical review of decision support systems for water treatment: Making the case for incorporating climate change and climate extremes” Environmental Science: Water Research and Technology. vol 3: 18-36.