Economic evaluation of using marine dredged material for erosion control along the northeast coast of the Nile Delta, Eg
- PDF / 6,078,816 Bytes
- 19 Pages / 595.276 x 790.866 pts Page_size
- 87 Downloads / 173 Views
ORIGINAL PAPER
Economic evaluation of using marine dredged material for erosion control along the northeast coast of the Nile Delta, Egypt Omran Frihy 1 & Wahid Moufaddal 2,3 & Essam Deabes 1 & Essam El Din Helmy 1
Received: 5 March 2016 / Accepted: 29 August 2016 # Saudi Society for Geosciences 2016
Abstract The present study is the first attempt in Egypt to assess feasibility of using of dredging material from Damietta Harbor in the northwestern Nile Delta for erosion control. The study also provides an economic evaluation for the shoreline management alternatives selected to mitigate for the effects of coastal erosion at two pilot eroding areas (namely, A and B) located near the Damietta Harbor. Results of compatibility analysis reveal that the dredging material is fairly compatible with the native sand of the nearby eroding beaches. In addition to soft nourishment by dredged sand, other types of coastal engineering measures which are often used in erosion management area were also evaluated as alternatives for erosion control and mitigation solution. Economic feasibility assessment by means of cost-benefit analysis of direct and indirect items has been carried out to facilitate comparison between these alternatives. Analysis of alternatives has been also supported by other criteria to select the cost-effective and environmentally acceptable option to protect the eroding pilot areas. These criteria include the high total cost paid for maintenance of the Damietta Harbor channel with no use, anticipated impacts on the littoral system, sustainability, future plans for protection of the existing coastlines, and lessons learned from previous shore protection works in the Nile Delta. The final selection of the best viable alternative
* Wahid Moufaddal [email protected]
1
Coastal Research Institute, El-Pharaana St, Alexandria 21514, Egypt
2
National Institute of Oceanography and Fisheries, Al-Anfoushy, Alexandria 21556, Egypt
3
Present address: The Regional Organization for the Protection of the Marine Environment (ROPME), P.O. Box 26388, 13124 Safat, State of Kuwait
indicates that the procedure of beach nourishment is the most appropriate form for protection area A, while a combination of groins and sand nourishment is more relevant for area B. In any case, material dredged from the navigation approach of the Damietta Harbor should be utilized as a borrow material in the nourishment schemes and excluding use of the terrestrial sources. Keywords Dredged sediment . Compatibility analysis . Economic evaluation . Cost-benefit analysis . Sand nourishment . Erosion control
Introduction The Nile Delta coastline (Fig. 1a) has a long history of erosion that has been aggravated due to the construction of the Aswan High Dam in 1964, which acts as a sediment trap in its reservoir south of Egypt. As early as 1964 (prior to the damming of the Nile River), an estimated 11.4 million m3 of quartz-rich sand was discharged annually from the Nile, accounting for nourishment of the delta littoral cell (Hammad et al. 19
Data Loading...
