Christopher Y. Choi, Ph.D.
Professor
Department of Agricultural and Biosystems Engineering
Shantz Bldg. No. 38, Rm 509
The University of Arizona, Tucson, Arizona 85721

Recent Articles in Proceedings

2008	Choi, C. Y., J. Y. Shen, R. G. Austin, Development of a Comprehensive Solute Mixing Model (AZRED) for Double-Tee, Cross, and Wye Junctions, 10th Annual Water Distribution Systems Analysis Symposium, Kruger Park, South Africa.
2008	Romero-Gomez, P., Z. Li, C. Y. Choi, S.G. Buchberger, K.E. Lansey, and V.T. Tzatchkov, Axial Dispersion in Pressurized Pipe under Various Flow Conditions, 10th Annual Water Distribution Systems Analysis Symposium, Kruger Park, South Africa.
2008	Romero-Gomez, P., C. Y. Choi, Lansey, K. E., Preis, A., Ostfeld, A., Sensor Network Design with Improved Water Quality Models at Cross Junctions, 10th Annual Water Distribution Systems Analysis Symposium, Kruger Park, South Africa.
2008	Pepper, I. L., Arnold, R., Bayraksan, G., Choi, C. Y. Lansey, K. E., Scott, C., Conjunctive Decentralized Dual Water Distribution Systems, 10th Annual Water Distribution Systems Analysis Symposium, Kruger Park, South Africa.
2008	Choi, C. Y. and I. L. Pepper, Recent Advances in Water Quality Modeling in a Pressurized Pipe Network – Development of AZRED, The inaugural Singapore International Water Week, June 23 - 27. Singapore.
2008	Lansey, K. E., I. L. Pepper, and C. Y. Choi, Conjunctive Decentralized Dual Water Distribution Systems, The inaugural Singapore International Water Week, Singapore. June. Singapore.
2008	Kubota, C., W. Lovichit, C. Y. Choi, and J. Schoonderbeek, Feasibility Study for Water Recovery System for Pad-and-Fan Cooled Greenhouse in Semiarid Climate, ISHS International Workshop on Greenhouse Environmental Control and Crop Production in Semi-Arid Regions, Tucson, Arizona.
2008	Choi, C. Y. Improvement of Water Quality Modeling for Microbial Risk Assessment, The Joint U.S. Environmental Protection Agency and Department of Homeland Security Conference on Real-World Applications and Solutions for Microbial Risk Assessment, Washington D. C., April 8-10.
2007	Choi, C. Y. Water Quality Modeling at the Water Village, Annual Department of Homeland Security University Network Summit on Research and Education, Washington D.C.
2007	Ho, C. K., C. Y. Choi, and S. McKenna, Evaluation of Complete and Incomplete Mixing Models in Water Distribution Pipe Network Simulations, World Environmental and Water Resources Congress, Tampa, FL.
2007	Austin, R. G., Romero, P., and C. Y. Choi, Transport Phenomena at Intersections at Low Reynolds Numbers,World Environmental and Water Resources Congress, Tampa, FL, May, 2007.
2007	Romero, P., Austin, R. G., and C. Y. Choi, Prediction of Contaminants in Water Distribution Systems using Artificial Neural Networks, World Environmental and Water Resources Congress, Tampa, FL, May, 2007.
2006	Romero-Gomez, P., C. Y. Choi , B. van Bloemen Waanders, and S. McKenna, Transport Phenomena at Intersections of Pressurized Pipe Systems, , 8th Annual Water Distribution Systems Analysis Symposium, Cincinnati, OH.
2006	O'Shaughnessy, S. A., C. Y. Choi, and T. Dominguez. Engineering Technologies to Manage Pathogen Reduction in Biosolids, American Society of Agricultural Engineers (ASAE) International Conference, Portland, Oregon.
2006	Romero-Gomez, P., G.A. Giacomelli, C. Y. Choi, and I. Lopez-Cruz, Ventilation Rates for a Naturally - Ventilated Greenhouse in Central Mexico , International Symposium on Greenhouse Cooling, Almeria, Spain.
2006	O'Shaughnessy, S. A., C. Y. Choi, and C. P. Gerba. Solar Drying of Biosolids with Engineering Interventions- Sustainable Methods for Disinfection of Pathogens – Summary of Results in Semi-Arid and Arid Locations, The 11th Institute of Biological Engineering Annual Meeting, Tucson , Arizona.
2005	Kim, M. Y., C. Y. Choi, and C. P. Gerba. Monitoring System of Microbial Organisms in Open Channels, American Society of Agricultural Engineers (ASAE) International Conference, Tampa, Florida. Paper No. 052123.
2005	O'Shaughnessy, S. A., M. Grabau, and C. Y. Choi, Pathogen Inactivation in Biosolids Solar Drying Beds and Implications for Land Application, American Society of Agricultural Engineers (ASAE) International Conference, Tampa, Florida. Paper No. 054090.
2005	Choi, C. Y., M. Grabau, and S. A. O'Shaughnessy, Pathogen Inactivation in Biosolids and Safe Agricultural Land Application, 10^th Annual Meeting of the Institute of Biological Engineering (IBE), Atlanta, Georgia.
2004	Song, I., S. W. Stine, J. Pimentel, Choi, C. Y., and C. P. Gerba. Role of Irrigation and Microbial Survival in Wastewater Reuse, Phoenix, AZ.
2004	Choi, C. Y., I. Song, S. W. Stine, J. Pimentel, C. P. Gerba. Irrigation with Reclaimed Water and risk of Microbial crop contamination, International Water Demand Management Conference, Dead Sea, Jordan.
2004	Choi, C. Y. and C. P. Gerba, 2004, Survival of Waterborne Pathogens on Crops after Contamination of Fields, International Association of Food Safety, Phoenix, AZ.
2003	Choi, C. Y., C. P. Gerba, and M. Riley. Surveillance of Biological Agents in Sewer Systems, Int. Conf. on Advanced Technologies for Homeland Security, Storrs, CONN.
2003	Choi, C. Y., J. Pimentel, I. Song, C. P. Gerba. Subsurface drip irrigation for vegetables using effluent, IWA 4th Int. Symposium on Wastewater Reclamation and Reuse. Mexico City, Mexico.
2003	Choi, C. Y., E. Suarez-Rey, C. P. Gerba. Wastewater Reuse using Subsurface Drip Irrigation: Advantages and Disadvantages. The Second Int. Conf. on Efficient Use and Management of Water in Urban Areas. Tenerife, Spain.
2003	O'Shaughnessy, S., K. Kim, and C. Y. Choi. Pathogen Reduction in Biosolids in Response to Environmental Factors. International ASAE Conference, Las Vegas, NV. Paper No. 037008.
2003	Kim, M., S. Boon, C. Y. Choi, and C. P. Gerba. Transport phenomena of Bacillus cereus spores through soil. International ASAE Conference, Las Vegas, NV. Paper No. 037029.
2003	Song, I., S. Stine, J. Pimentel, C. Y. Choi, and C. P. Gerba. The Role of Irrigation and Wastewater: Comparison of Subsurface Drip Irrigation and Furrow Irrigation, International ASAE Conference, Las Vegas, NV. Paper No. 032373.
2003	Stine, S.W., I. Song, C. Y. Choi, and C.P. Gerba. Effect of Environmental Conditions on the Survival of Microbial Pathogens on the Surface of Cantaloupe. American Society for Microbiology, Washington D.C.
2003	Stine, S.W., I. Song, C. Y. Choi, and C.P. Gerba. Effect of Irrigation Methods and Environmental Conditions on the Contamination and Survival of Enteric Microorganisms on Cantaloupe. International Association of Food Safety, New Orleans, LA.

Workshops

2008	Computational Fluid Dynamics (CFD) Applications for Greenhouses, Queretaro, Mexico. Sponsored by University of Queretaro/University of Chapingo/University of Arizona
2004	Transport Phenomena and Pathogen Reduction in Biosolids, 12/5-12/17, The University of Arizona, Tucson, Arizona. IALC/USAID Dryland Project.
2004	Recycling of Wastewater and Biosolids: Maximizing Benefits and Safety. 6/7-6/10, National Center for Agricultural Research and Technology Transfer, Amman, Jordan. Sponsored by RSS, USAID, and IALC. (with Charles P. Gerba and Peter M. Waller)
2004	Biosolids Solar Drying and Pathogen Reduction, 5/9-5/20, The University of Arizona, Tucson, Arizona. IALC/USAID Dryland Project.
2003	Biosolids Workshop and Technical Tour, 12/1-12/14, The University of Arizona, Tucson, Arizona. IALC/USAID Dryland Project.