The Handbook of Environmental Engineering
(HEE), Volume 19, Environmental and
Natural Resources Engineering, is published
in memory of both Dr. Nazih K. Shammas
(Left) and Dr. Donald B. Aulenbach (Right),
who contributed significantly as the authors/
coeditors the HEE series and both were
environmental humanitarian engineering
professors at the Lenox Institute of Water
Technology (LIWT), USA, for two decades.
Dr. Aulenbach also taught at the Rensselaer
Polytechnic Institute (RPI), USA. Their former
colleagues of HEE, LIWT, and RPI and their
friends have jointly contributed to this HEE