Long-term variation of longshore sediment transport |
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| Institution: | 1. The First Design Institute of Navigation Engineering, Ministry of Communications, Tianjin, P.R. China;2. Tianjin University, Tianjin, P.R. China;1. Central Geomatics Laboratory (CGL), ESSO – National Centre for Earth Science Studies (NCESS), Akkulam, Thiruvananthapuram 695011, Kerala State, India;2. Centre for GeoTechnology, Manonmaniam Sundaranar University, Tirunelveli 627012, Tamil Nadu, India;1. Department of Geography, Fakir Mohan University, VyasaVihar, Nuapadhi, 756089, Balasore, Odisha, India;2. Department of Civil and Environmental Engineering, Federal University of Paraíba, 58051-900, João Pessoa, Paraíba, Brazil;3. Department of Geosciences, Federal University of Paraíba, 58051-900, João Pessoa, Paraíba, Brazil;4. Department of Marine Sciences, Berhampur University, 760007, Bhanjabihar, Berhampur, Odisha, India;5. Department of Environmental Studies, Berhampur University, 760007, Bhanjabihar, Berhampur, Odisha, India;1. Department of Earth Science, University of Florence, Florence, 50121, Italy;2. Leghorn Port Authority, Leghorn, 57123, Italy;3. Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA;4. Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, 08901, USA;1. Indian Institute of Public Health-Delhi, Public Health Foundation of India, Gurgaon, India;2. Epidemiology and Communicable Diseases Division, Indian Council of Medical Research, New Delhi, India |
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| Abstract: | For planning and designing a new harbour located on the sand coast of Nouakchott, Mauretania, the Bijker formula was adopted to compute the longshore sediment transport. The shoreline is nearly straight at this site. The beach is composed of fine sand with a median grain diameter of D50 = 200 μm. The beach slope is about 1:20. Wave observation data from 1976 to 1982 were used for the formula. Computed results show a clear variation of annual transport. The ratio maximum:mean value is 1.31, and the ratio maximum: minimum is 1.89 in seven years.Probability analysis indicates that the long-term variation of the longshore transport follows the Gumbel distribution. Accordingly, the formulae which can predict the probable and most disadvantageous total sediment transport values for multiple years blocked by a littoral barrier are derived. |
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