1. Water Resources Engineer, CDM, One Cambridge Place, 50 Hampshire St., Cambridge, MA 02139.
2. Professor, Tufts Univ., Dept. of Civil and Environmental Engineering, Medford, MA 02155.
3. Research Associate Professor, Tufts Univ., Dept. of Civil and Environmental Engineering, Medford, MA 02155.
4. Professor and Berger Chair, Tufts Univ., Dept. of Civil and Environmental Engineering, Medford, MA 02155.