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Papers by Walaa Ali
Egyptian journal of aquatic biology and fisheries, 2017
Ras El-Bar resort located in the northeastern Egyptian Nile Delta coast includes a very active sa... more Ras El-Bar resort located in the northeastern Egyptian Nile Delta coast includes a very active sandy beach coastline, which extends roughly 12 km west of Damietta Nile branch. Erosion along the coast of Ras El-Bar resort has been mitigated by constructing a series of coastal engineering structures that include jetties, groins, seawalls and detached breakwaters. The Project of protecting Ras El-bar resort started early in 1941 and ended in 2010 and aimed to decrease the continuous erosion and protecting the investments at the Ras El-bar resort. Studying shore line change at this region is important in making the development plan of protection works along the Egyptian northeastern coast by evaluating the effect of constructed detached breakwaters on shoreline. The purpose of this paper is to calculate the change detection rate of Ras El-bar shoreline at the last 15 years (2000-2015) and to evaluate the effect of basaltic stones and dollos blocks that constructed to re-protect the western jetty and fanar area by mitigating beach erosion. Besides, this study aimed to determine the degree of shoreline stability and solidity for future investment plans. Remote Sensing (RS) technique was used as a low cost method to Evaluate the morphologic changes (erosion/accretion patterns) from analysing Landsat-8, spot4, ETM+, and Egypt sat satellite images that acquired in the period from (2000-2015) to get the shoreline vector position of each date year. It was found that the shoreline change rate at Ras El-Bar resort at present study in the period from 2000-2015 has reached an erosion rate of (-0.1:-1.1m/yr) and a rate of accretion that reached to (+0.2:+4m/yr) at maximum. These rates values consider as the ideal values for stable beach and enabled us to give a clear conclusion that Ras El-Bar's beaches behind the detached breakwaters are stable and no need for future protection in the near future. Therefore, this study did not examine the area hydrodynamiclly because there is no need for that, since the message given by the stable beach for a long time is a strong testament refers to a balance of bilateral dimensions within the depths of coastal zone. As long as the beach is stable, the surf zone is stable.
Egyptian Journal of Aquatic Biology and Fisheries
Coastal and Marine Environments - Physical Processes and Numerical Modelling, Jan 22, 2020
The main objective of this research is applying numerical modeling to simulate the impact of the ... more The main objective of this research is applying numerical modeling to simulate the impact of the Suez Canal jetties on the beach morphology and hydrodynamic regime along the Suez Canal coastal zone. In addition, coastal processes including waves and wave-induced currents will be evaluated using 2D modeling. This research will contribute to quantify the shoreline stability during the last three decades. Hydrodynamic and sediment transport (ST) models are utilized to predict sediment transport pathways and how sediment might move within the entrance of Suez Canal port. Remote sensing analyses of the Landsat Thematic Mapper images during 2000-2018 show siltation processes at the entrance of the Suez Canal. Vector analyses of the images' data indicated updrift accretion at a rate of +15 m/year and downdrift erosion at a rate of −13 m/year. Coastal processes including waves and currents contribute to shoaling problem along the navigation channel of the Suez Canal port. Applications of 2-3D models were used to simulate wave and current dissipation. In addition, beach slope profiles and hydrodynamic models are used to help in understanding the impact of coastal processes on beach morphology and hydrodynamic regime controlling siltation problem along the entrance of Port Said harbor.
Egyptian journal of aquatic biology and fisheries, 2017
Ras El-Bar resort located in the northeastern Egyptian Nile Delta coast includes a very active sa... more Ras El-Bar resort located in the northeastern Egyptian Nile Delta coast includes a very active sandy beach coastline, which extends roughly 12 km west of Damietta Nile branch. Erosion along the coast of Ras El-Bar resort has been mitigated by constructing a series of coastal engineering structures that include jetties, groins, seawalls and detached breakwaters. The Project of protecting Ras El-bar resort started early in 1941 and ended in 2010 and aimed to decrease the continuous erosion and protecting the investments at the Ras El-bar resort. Studying shore line change at this region is important in making the development plan of protection works along the Egyptian northeastern coast by evaluating the effect of constructed detached breakwaters on shoreline. The purpose of this paper is to calculate the change detection rate of Ras El-bar shoreline at the last 15 years (2000-2015) and to evaluate the effect of basaltic stones and dollos blocks that constructed to re-protect the western jetty and fanar area by mitigating beach erosion. Besides, this study aimed to determine the degree of shoreline stability and solidity for future investment plans. Remote Sensing (RS) technique was used as a low cost method to Evaluate the morphologic changes (erosion/accretion patterns) from analysing Landsat-8, spot4, ETM+, and Egypt sat satellite images that acquired in the period from (2000-2015) to get the shoreline vector position of each date year. It was found that the shoreline change rate at Ras El-Bar resort at present study in the period from 2000-2015 has reached an erosion rate of (-0.1:-1.1m/yr) and a rate of accretion that reached to (+0.2:+4m/yr) at maximum. These rates values consider as the ideal values for stable beach and enabled us to give a clear conclusion that Ras El-Bar's beaches behind the detached breakwaters are stable and no need for future protection in the near future. Therefore, this study did not examine the area hydrodynamiclly because there is no need for that, since the message given by the stable beach for a long time is a strong testament refers to a balance of bilateral dimensions within the depths of coastal zone. As long as the beach is stable, the surf zone is stable.
Egyptian Journal of Aquatic Biology and Fisheries
Coastal and Marine Environments - Physical Processes and Numerical Modelling, Jan 22, 2020
The main objective of this research is applying numerical modeling to simulate the impact of the ... more The main objective of this research is applying numerical modeling to simulate the impact of the Suez Canal jetties on the beach morphology and hydrodynamic regime along the Suez Canal coastal zone. In addition, coastal processes including waves and wave-induced currents will be evaluated using 2D modeling. This research will contribute to quantify the shoreline stability during the last three decades. Hydrodynamic and sediment transport (ST) models are utilized to predict sediment transport pathways and how sediment might move within the entrance of Suez Canal port. Remote sensing analyses of the Landsat Thematic Mapper images during 2000-2018 show siltation processes at the entrance of the Suez Canal. Vector analyses of the images' data indicated updrift accretion at a rate of +15 m/year and downdrift erosion at a rate of −13 m/year. Coastal processes including waves and currents contribute to shoaling problem along the navigation channel of the Suez Canal port. Applications of 2-3D models were used to simulate wave and current dissipation. In addition, beach slope profiles and hydrodynamic models are used to help in understanding the impact of coastal processes on beach morphology and hydrodynamic regime controlling siltation problem along the entrance of Port Said harbor.