1. Associate Professor, New Mexico State Univ., Las Cruces, NM 88003 (corresponding author).
2. Formerly, Graduate Research Assistant, New Mexico State Univ., Las Cruces, NM 88003.
3. Research Specialist, New Mexico State Univ., Las Cruces, NM 88003.
4. Hydrologist, Sandia National Laboratories, P.O. Box 5800, MS 0735, Albuquerque, NM 87185.
5. Associate Professor, New Mexico State Univ., Las Cruces, NM 88003.