The coastal regions of India are densely populated and most biological productive ecosystems which are threatened by erosion, natural disaster, and anthropogenic interferences. These threats have made priority in appraisal of shoreline dynamicity as part of sustainable management of coastal zones. The present study assessed the long- to short-term dynamicity of shoreline positions along the coast of Puri district, Odisha, India, during the past 25 years (1990–2015) using open-source multi-temporal satellite images (Landsat TM, ETM + , and OLI) and statistical-based methods (endpoint rate, linear regression rate and weighted linear regression). The long-term assessment during 1990–2015 shows that shoreline accredited at the rate of 0.3 m a−1 with estimated mean accretion and erosional rate of 1.18 m a−1 and 0.64 m a−1, respectively. A significant trend of coastal erosion is primarily observed on the northern side of Puri district coast. A cyclic pattern of accretion (during 1990–1995 and 2000–2004) and erosion (during 1995–2000 and 2009–2015) was observed during the assessment of short-term shoreline change. It exhibited significant correlation with the landfall of severe cyclones and identified cyclic phases after severe cyclonic storms, i.e., phase of erosion, phase of accretion and phase of stabilization. Overall, the natural processes specifically the landfall of tropical cyclones and anthropogenic activities such as the construction of coastal structures, encroachment and recent construction in the coastal regulatory zone, and construction of dams in upper catchment areas are the major factors accountable for shoreline changes. The output of the research undertaken is not only crucial for monitoring the dynamism of coastal ecosystem boundaries but to enable long- to short-term coastal zone management planning in response to recently reported high erosion along the Puri coast. Moreover, the usage of open-source satellite imageries and statistical-based method provides an opportunity in developing cost-effective spatial data infrastructure for shoreline monitoring and vulnerability mapping along the coastal region.

Response of long- to short-term changes of the Puri coastline of Odisha (India) to natural and anthropogenic factors: a remote sensing and statistical assessment

Coastal districts of India being diverse in nature are under constant vulnerability to hazards. The article analyzes vulnerability as a function of exposure, sensitivity and adaptation capacity. We selected site-specific factors of exposure, sensitivity and adaptation for constructing the composite vulnerability index. Findings revealed very high and high vulnerability in the eastern coastal districts while western coastal districts experienced moderate and low vulnerability. High frequency of cyclone and storm surge, low socio-economic status and lack of basic amenities and facilities were found significant stressors for increasing vulnerability in coastal districts. Composite vulnerability index not only helped in analyzing causative factors of vulnerability but also proved to be an effective tool in identifying priority districts where efforts could be made to lessen vulnerability. The study calls for policy measures to reduce vulnerability and safeguard the coastal communities from the risk of disasters.

Assessing hazards induced vulnerability in coastal districts of India using site-specific indicators: an integrated approach

Anthropogenic Land Use and Land Cover Changes—A Review on Its Environmental Consequences and Climate Change

Immediate disturbances induced by tropical cyclone Fani on the coastal forest landscape of eastern India: A geospatial analysis

/pdf/the-conception-planning-and-implementation-of-integrated-4ihyrxbzt6.pdf

The conception, planning and implementation of integrated coastal and ocean management for sustainable blue economy in Bangladesh

The coastal zone is a region where land, ocean and atmosphere interact and hence it is dynamic in nature. India has a long coastline which was not adequately monitored until the advent of the satellite remote sensing era in the 70s. India has a very robust remote sensing program that the Indian Remote Sensing Satellite (IRS) series of satellites were effectively used to monitor coastal habitats, landforms, shoreline, water quality, etc., and changes were identified during the last 40 years. The classification system for coastal habitats and the classification and geometric accuracies of products were standardized. Detailed information for mangroves communities and characteristics of coral reefs were generated. The high and low tide lines were delineated seamlessly for the entire coastline using satellite data. All these data were organized in a GIS and the coastal database for the entire country was created. Impacts of various hazards on such as cyclones, tsunami and sea level changes on coastal h...

https://tandfonline.com/doi/pdf/10.1080/10095020.2017.1333715

Shailesh Nayak

Papers

Coastal zone management in India − present status and future needs