1. Department of Land Management and Environment, the Hashemite University, Zarqa, 13115 Jordan.
2. Hashemite University, P.O. Box 150459, Zarqa, Jordan 13115. Phone: + 962 5 390 3333, Ext. 4476; Fax: + 962 5 382 6823; E-mail: moshrik@hu.edu.jo
3. Department of Civil Engineering, The Hashemite University, Zarqa, 13115 Jordan.