SHORELINE CHANGES USING DIGITIZING OF LANDSAT IMAGES AT MIAMI TO MONTAZA BEACH, ALEXANDRIA, EGYPT

Alexandria city in Egypt is one of important cities in the Mediterranean coast. Alexandria suffers from many erosion problems along its coastline. The shore line of Alexandria beach was studied using remote senescing and field data. A case study of a submerged breakwater, which was constructed at Alexandria beach to stabilize the eroded beach of Miami - Montaza areas in years 2000 to 2016, is presented. The data of Alexandria beach were provided by Landsat7 satalite and proccseed by software program ERDAS IMAGINE 2013 which gives high resolution of the studied area. Then the shorelines were digitized by using software ARC GIS 10.1. This study introduce the shoreline response due to the construction of the submerged breakwater using the Digital Shoreline Analysis System (DSAS). The analysis shows shoreline accretion along most areas of Miamy - Asafra - Mandara - Montaza beach with range from 1 to 20 meter per year. The shoreline erosion exist at eastern part of Asafra beach and western part of Mandara beach with range from -1.5 to -10 meter per year. A beach width varied from 30 to 55 m compared to 0.0 to 25 m before the submerged breakwater. Shoreline change prediction model for coastal zone at Mimi to Montaza beach in years 2020, 2030, and 2050 is estimated according to DSAS settings and Linear regression rate. It was observed that during 2016-2050 the accretion distance along the coastline of Miami to montaza beach was varied between (5- 60) m. Also the predicted shoreline indicates that the erosion will take place in the Montaza beach with distance varied between (20) m.