1. Assistant Professor, Dept. of Biosystems and Agricultural Engineering, Oklahoma State Univ., 120 Agricultural Hall, Stillwater, OK 74078-6016. E-mail: garey.fox@okstate.edu
2. Graduate Research Assistant, Dept. of Biosystems and Agricultural Engineering, Oklahoma State Univ., 111 Agricultural Hall, Stillwater, OK, 74078-6016. E-mail: jwfuchs@okstate.edu
3. Environmental Engineer, U.S. Army Corps of Engineers, Engineer Research and Development Center, 3909 Halls Ferry Rd., Vicksburg, MS 39180. E-mail: victor.f.medina@erdc.usace.army.mil
4. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of California-Berkeley, 760 Davis Hall, Berkeley, CA 94720-1710. E-mail: katapatt@calmail.berkeley.edu