- Dona Paula, Goa, India.
- +91-0832- 2450327
- iiosc2020[at]nio[dot]org
| Abstract Submission No. | ABS-2022-09-0075 |
| Title of Abstract | Linkages between sediment grain size variability and cross-shore morphodynamic behaviour - a case study of four tropical sandy beaches, Central West coast of India |
| Authors | Lynda-Uta Edet Okon*, Dr. Jaya Kumar Seelam |
| Organisation | CSIR-National Institute of Oceanography Goa |
| Address | Ocean Engineering Division, CSIR-National Institute of Oceanography Dona Paula, Goa, India Pincode: 403004 Mobile: 8097671070 E-mail: lyndaokon@gmail.com |
| Country | India |
| Presentation | Oral |
| Abstract | Shoreline changes are mostly predicted through variations in the sediment transport estimates which are often based on a single grain size. However, in-situ field studies highlight the variability in sediment grain sizes along beaches. Though the role of sediment grain size heterogeneity in the assessment of coastal morphodynamics is important, more often, this variation is seldom considered. The use of uniform median grain size (D50) in the evaluation of sediment relationships along with cross-shore profiles of beaches, particularly in the estimation of the beach face slope, is attempted in this paper. The potential linkages existing between variability in sediment grain size, the shoreline morphology characteristics and prevalent physical processes are being investigated. To this end, field studies of cross-shore sediment grain size distribution, beach profiles, and wave properties (significant wave height and wave period) were undertaken for four tropical beaches (Baga, Candolim, Calangute, and Sinquerim) along Goa coast in the Central West coast of India. The empirical description available in literature is compared to measured profile data and mean grain size to assess potential relationships. The implications of this comparison are herein discussed. Keywords: coastal morphodynamics, beach profile, beach face slope, grain size heterogeneity |