View in EDS

Analyzing and Modeling Shoreline Variability at the Barrier Spit of Chilika Lagoon.

Saved in:
Bibliographic Details
Title: Analyzing and Modeling Shoreline Variability at the Barrier Spit of Chilika Lagoon.
Authors: Pradhan, Subhasis, Mohanty, Pratap Kumar, Samal, Rabindro Nath, Pradhan, Umakanta, Kar, Prabin Kumar, Mohanty, Madan Mohan, Sahoo, Rabindra Kumar, Dalai, Rajat Kumar
Source: Marine Geodesy; Nov2025, Vol. 48 Issue 6, p629-664, 36p
Subject Terms: COASTAL changes, EROSION, SHORELINE monitoring, SUSTAINABILITY, LAGOONS, ESTUARY management, CLIMATE change adaptation, BEACH erosion
Geographic Terms: ODISHA (India), INDIA
Abstract: Shoreline change has emerged as an alarming threat to the coastline worldwide, impacting the natural environment and human development. Among India's coastal lagoons, Chilika Lagoon bears international importance for its rich biological significance. However, growing coastal erosion along the Odisha coast poses a significant concern for the lagoon's stability. The present study investigates shoreline change along the 80 km coastal stretch of Chilika Lagoon over a 46-year period (1975–2020) using the DSAS 5.0 model. The coastline was divided into four zones, each exhibiting distinct patterns of erosion and accretion. Overall, accretion dominated over erosion, with Zone 2 showing the least variability and Zone 3 experiencing the highest accretion rates, particularly after the artificial opening of the Sipakuda inlet in 2000. Zone 4, with high variability, demonstrated a lower rate of accretion. Shoreline predictions for the period 2013–2040, using the LITLINE model, revealed both erosional and depositional trends, with significant shoreline advancement to the south of Gabakunda inlet and recession to the north of Dhalabali inlet. Cyclonic storm landfall positions and inlet dynamics were identified as key contributors to shoreline change, especially in Zones 3 and 4. Future wave climate simulations suggest the lagoon is not at immediate risk from wave climate. The study highlights the vulnerability of the northern spit, with recommendations for strategic inlet management, mangrove restoration, and periodic dredging of inner channels to mitigate shoreline erosion. These measures align with the principles of SDGs 13, SDG 14, SDG 11, and SDG 15, supporting sustainable coastal management practices. This research underscores the importance of balancing ecological preservation with climate resilience in coastal management efforts. [ABSTRACT FROM AUTHOR]
Copyright of Marine Geodesy is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Complementary Index
Description
Abstract:Shoreline change has emerged as an alarming threat to the coastline worldwide, impacting the natural environment and human development. Among India's coastal lagoons, Chilika Lagoon bears international importance for its rich biological significance. However, growing coastal erosion along the Odisha coast poses a significant concern for the lagoon's stability. The present study investigates shoreline change along the 80 km coastal stretch of Chilika Lagoon over a 46-year period (1975–2020) using the DSAS 5.0 model. The coastline was divided into four zones, each exhibiting distinct patterns of erosion and accretion. Overall, accretion dominated over erosion, with Zone 2 showing the least variability and Zone 3 experiencing the highest accretion rates, particularly after the artificial opening of the Sipakuda inlet in 2000. Zone 4, with high variability, demonstrated a lower rate of accretion. Shoreline predictions for the period 2013–2040, using the LITLINE model, revealed both erosional and depositional trends, with significant shoreline advancement to the south of Gabakunda inlet and recession to the north of Dhalabali inlet. Cyclonic storm landfall positions and inlet dynamics were identified as key contributors to shoreline change, especially in Zones 3 and 4. Future wave climate simulations suggest the lagoon is not at immediate risk from wave climate. The study highlights the vulnerability of the northern spit, with recommendations for strategic inlet management, mangrove restoration, and periodic dredging of inner channels to mitigate shoreline erosion. These measures align with the principles of SDGs 13, SDG 14, SDG 11, and SDG 15, supporting sustainable coastal management practices. This research underscores the importance of balancing ecological preservation with climate resilience in coastal management efforts. [ABSTRACT FROM AUTHOR]
ISSN:01490419
DOI:10.1080/01490419.2025.2476588