1. Senior Environmental Engineer, Dept. of Civil Engineering, Environmental and Sanitary Engineering Div., Faculty of Engineering, Cairo Univ., Cairo 12613, Egypt.
2. Assistant Professor, Dept. of Civil Engineering, Environmental and Sanitary Engineering Div., Institute of Aviation Engineering and Technology, Giza 12815, Egypt; Supervisor, Dept. of Civil Engineering, Faculty of Engineering, Cairo Univ., Cairo 12613, Egypt (corresponding author).
3. Professor, Dept. of Civil Engineering, Environmental and Sanitary Engineering Div., Faculty of Engineering, Cairo Univ., Cairo 12613, Egypt.