01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-01-0303 |
| Title of Abstract | Intra-Annual Shoreline Change and Beach Profile Variability on Either Side of Gopalpur Port: An Impact Assessment |
| Authors | Nithya Jeevanand*, P C Mohanty, Karthi J, Sudheer Joseph, T. M. Balakrishanan Nair |
| Organisation | INCOIS |
| Address | C2, INCOIS Quarters, Ocean Valley, Pragathi Nagar Hyderabad, Telangana, India Pincode: 500090 E-mail: n.jeevanand-p@incois.gov.in |
| Country | India |
| Presentation | Oral |
| Abstract | Coastal environments worldwide have observed increasing human interaction caused by changing infrastructure, with port construction being one of the main drivers of morphodynamic modification. Here, we examine the intra-annual variability of shoreline change and beach profiles on either side of Gopalpur Port, Odisha, India, to provide an understanding of its localised coastally-induced impacts. The study employs multi-temporal satellite imagery for seasonal variations from 2020 to 2024 along the coast. Shorelines were extracted using the semi-automated Normalised Difference Water Index (NDWI) and Modified NDWI (MNDWI), which were subsequently refined using Otsu thresholding and segmentation image processing. The tidal corrections, however, ensured the location was accurate and diminished positional errors derived from Archiving, Validation and Interpretation of Satellite Oceanographic data (AVISO), completely defining shoreline lines for analysis. Shoreline change analysis used metrics from the Linear Regression Rate (LRR), while the beach profile data quantified changes in volume of beach to understand the seasonal variability. Intra-annual variability of shoreline change rate due to surf zone dynamics and structure of breakwaters and associated Gopalpur Port have resulted in disturbance to alongshore sediment transport, causing yet to be explored distinguishable patterns of erosion to the updrift (north side) and accretion/stabilization to the downdrift (south side), Thus helping the inter-annual assessment to understand the coast's dynamic, seasonally specific, and multi-supply responses to the change in wave and sediment supply, which moves beyond static assessments. This will add a detailed characterisation of the impact of the port on coastal processes, which adds a level of complexity when interpreting coastal processes, the interaction of port structures, alongshore transport, wave energy and sediment supply, provides essential material for sustainable coastal zone management, and for future development planning and has the potential to support understanding in designing mitigation strategies associated with erosion and accretion issues over south Odisha coastal edge. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | MNDWI, NDWI, Tidal Correction, Beach Profile, Shoreline Change Rate. |
| For Awards | no |