University of Mansoura Damietta Faculty of Science Department of Geology ENVIRONMENTAL GEOLOGY AND ENVIRONMENTAL GEOPHYSICS OF NORTHERN NILE DELTA IN TERMS OF NEOTECTONICS AND PHYSICAL PROCESSES BY WAEL ABDEL WAHAB MAHMOUD IBRAHEM (Damietta Faculty of Science) (B. Sc. In Geology) A Thesis Submitted in Partial Fulfillment for the Degree of Master of Science in Geology (2002)