Coastal Region Of India Research Articles

Rhinosporidiosis- A retrospection

Rhinosporidiosis is a chronic granulomatous disease caused by Rhinosporidium seeberi. It is endemic in the coastal region of India where agriculture is the most common occupation. It grows in stagnant water and transepithelial spread is the common mode of infection especially in the nose and nasopharynx. Patients present with reddish granular, polypoidal mass in the nose. Surgical excision with cauterization of the base is the treatment of choice. Recurrence is common even after meticulous clearance of the disease. This is a retrospective study done in a tertiary care hospital in Mangalore, India. The case records of histopathologically confirmed cases of rhinosporidiosis, during 10 years period between January 2007 and December 2016, were studied. Demographic profile, symptoms, site of involvement, treatment done, follow up and recurrence during follow up were noted and analysed. Out of the 34 patients, 31 (91.17%) were males and 3 (8.82%) were females. All were agriculturists. Commonest age group is 3rd and 6th decade. Bathing in pond water was the common source of infection. Nasal obstruction was the most common symptom. The most frequent site of occurrence is nasal cavity, with inferior turbinate being preferred site. Out of the 34 cases, 22 (64.70%) were recurrent cases with past history of surgery. Out of the 34 patients treated in our centre, no recurrence was seen in newly diagnosed cases during the study period, whereas 2 of the recurrent cases came with recurrence. Keywords: Rhinosporidiosis, Surgical treatment, Recurrence.

Development of a magnetically separable co-immobilized laccase and versatile peroxidase system for the conversion of lignocellulosic biomass to vanillin

ABSTRACT Lignin obtained from renewable biomass is a potential feedstock for the synthesis of various value-added chemicals through efficient biocatalytic routes. The ligninolytic enzymes-assisted depolymerization of lignin to vanillin constitutes the most commercially attractive and promising approach in green chemistry as vanillin constitutes the second most prevalent flavoring agent. Thus, in the present work, immobilized laccase and versatile peroxidase, and further, a co-immobilized laccase and versatile peroxidase system on magnetic silica microspheres (MSMS) were developed to generate a robust biocatalytic system that mediates the depolymerization of lignin obtained from Casuarina equisetifolia biomass. The depolymerization of lignin by free and immobilized laccase showed a vanillin yield of 24.8% and 23%, respectively, at pH 4.0 in 6 h at 30°C against a vanillin yield of 20% and 21.7% with the free and immobilized versatile peroxidase, respectively, at pH 5.0°C and 50°C. Comparatively, the system with the co-immobilized laccase and versatile peroxidase exhibited a 1-fold and 1.2-fold higher vanillin yield than the free and immobilized laccase system, respectively. On comparing with the versatile peroxidase system, the co-immobilized biocatalytic system displayed 1.3-fold and 1.2-fold increased vanillin yield than the free and immobilized versatile peroxidase system, respectively, at a pH of 6.0 in 6 h at 30°C with an enzyme concentration of 1 U/ml. The reusability studies of the co-immobilized biocatalytic system exhibited that both the enzymes retained up to 40% of its activity till sixth cycle. Implications: The waste biomass of Casuarina equisetifolia is widely available around the coastal regions of India which does not have any agricultural or industrial applications. The present work exploits the lignocellulosic content of the Casuarina biomass to extract the lignin, which provides a renewable alternative for the production of the commercially high-valued compound, vanillin. This work also integrates a co-immobilized biocatalytic process comprising of laccase and versatile peroxidase leading to an environmentally benign enzymatic process for the depolymerization of lignin to vanillin.

The impact of Indian Ocean dipole on tropical Indian Ocean surface wave heights in ERA5 and CMIP5 models

AbstractThe present study examines the relationship between the tropical Indian Ocean (TIO) significant wave height (SWH) and Indian Ocean dipole (IOD) during boreal summer season (June through August) in the latest version of European Centre for Medium‐Range Weather Forecasts reanalysis (ERA5) and wave simulations forced with surface winds and sea‐ice fields from the Coupled Model Intercomparison Project version‐5 (CMIP5) models. The interannual variability of SWH shows a significant negative correlation with the IOD over TIO. SWH anomalies display meridional tripole pattern with significant negative (positive) anomalies over eastern equatorial Indian Ocean caused by anomalous easterlies (westerlies), and positive (negative) anomalies over southeastern TIO and the north Bay of Bengal during positive (negative) phase of IOD. The strong wave heights along the east coast of India during positive IOD and the south and southwest coast of India during negative IOD are noticed. CMIP5 models GFDL‐CM3, MRI‐CGCM3 and the multi‐model mean display considerable skill in capturing these teleconnections with substantial magnitude differences. A thorough understanding of the teleconnections between IOD and TIO wave heights is a significant prerequisite for the accurate forecast of surface waves in the Indian Ocean. Hence, this study advocates the importance evaluating the ability of models in representing the SWH and IOD interactions and its implications on Indian coastal regions in the form of inundation, coastal flooding and other vulnerabilities in a changing climate scenario.

Spatial variations in dissolved inorganic nutrients in the groundwaters along the Indian coast and their export to adjacent coastal waters.

Submarine Groundwater Discharge (SGD) is one of the main external nutrient sources to the coastal waters. The concentrations of nutrients in groundwaters are a few folds higher than that of adjacent coastal waters; therefore, SGD enhances nutrients levels in the coastal waters and influences coastal biota. In order to examine the spatial and seasonal variability in nutrient concentrations and exchange to the coastal waters, groundwater samples were collected at ~ 90 locations along the Indian coast during the wet and dry seasons. This study revealed that dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphates (DIP) and urea were found to be high during the dry than wet period. Higher concentrations of DIN and DIP were observed during both wet and dry periods in the groundwater along the east than the west coast of India. The State-wise mean amount of fertilizer used during Kharif (wet) and Rabi (dry) period in each Indian State showed significant correlation with mean concentrations of DIN and urea. The observed linear relationship of DIN with bacterial respiration and inverse relationship with DO saturation and ammonium in groundwater suggested that decomposition of organic matter and nitrification contributed to the DIN pool in the groundwater. The mean rate of SGD fluxes varied between 1.6 × 104 m3/day and 1.75 × 1011 m3/day in the Indian coastal region. The annual mean SGD flux of DIN and DIP was estimated to be 0.103 ± 0.02 and 0.021 ± 0.01 Tg (1 Tg = 1012 g) to the western coastal Bay of Bengal (east coast of India) and 0.06 ± 0.03 and 0.015 ± 0.01 Tg/y to the eastern coastal Arabian Sea (west coast of India) respectively. The estimated SGD flux of DIN and DIP to the Indian coastal waters amounted to 0.163 ± 0.04 and 0.036 ± 0.02 Tg/y respectively, and it is almost close to that of nutrients discharged by rivers (0.22 ± 0.05 and 0.11 ± 0.03 Tg/y respectively). Among the external sources of nitrogen and phosphorus, such as river discharge, atmospheric deposition, the contribution by SGD is highly significant in the Bay of Bengal (30 and 17% respectively) than in the case of Arabian Sea (24 and 25% respectively).

Bay of Bengal cyclones Mora and Maarutha in regional atmospheric modeling system

The coastal region of India is exposed to nearly 7% of tropical cyclones occurring in the world. The large basin of Bay of Bengal incites cyclones with varying intensity that is capable enough to cause huge damage to life and money. To understand the underlying mechanism behind these TCs and enhance their forecast accuracy, it is essential to simulate them precisely using different numerical models by applying appropriate micro-physics, Cumulus Convection (CC) and Planetary Boundary Layer (PBL) schemes. The present study uses the Regional Atmospheric Modeling System (RAMS) to simulate TCs Mora and Maarutha in the Bay of Bengal region and associated landfall in Northeast India and Bangladesh. The study is an approach to investigate and analyze winds, precipitation and other dynamical variables associated with the formation of these cyclones by providing initial and boundary conditions from the NCEP-FNL (Final) operational global analysis data (6 hourly temporal and 1.0° spatial resolution). The model output is further nudged towards the observational soundings which are obtained from NCAR-ADP upper air observational dataset. Along with this, an attempt has been made to obtain the optimum configuration of distribution and intensity of a precipitation field to match observations.

How dorice seedlings of landrace Pokkali survive in saline fields after transplantation? Physiology, biochemistry, and photosynthesis.

Rice, one of the most important staple food crops in the world, is highly sensitive to soil salinity at the seedling stage. The ultimate yield of this crop is a function of the number of seedlings surviving after transplantation in saline water. Oryza sativa cv. IR64 is a high-yielding salinity-sensitive variety, while Pokkali is a landrace traditionally cultivated by the local farmers in the coastal regions in India. However, the machinery responsible for the seedling-stage tolerance in Pokkali is not understood. To bridge this gap, we subjected young seedlings of these contrasting genotypes to salinity and performed detailed investigations about their growth parameters, ion homeostasis, biochemical composition, and photosynthetic parameters after every 24h of salinity for three days. Taken together, all the physiological and biochemical indicators, such as proline accumulation, K+/Na+ ratio, lipid peroxidation, and electrolyte leakage, clearly revealed significant differences between IR64 and Pokkali under salinity, establishing their contrasting nature at this stage. In response to salinity, the Fv/Fm ratio (maximum quantum efficiency of Photosystem II as inferred from Chl a fluorescence) and the energy conserved for the electron transport after the reduction of QA (the primary electron acceptor of PSII), to QA-, and reduction of the end electron acceptor molecules towards the PSI (Photosystem I) electron acceptor side was higher in Pokkali than IR64 plants. These observations reflect a direct contribution of photosynthesis towards seedling-stage salinity tolerance in rice. These findings will help to breed high-yielding crops for salinity prone agricultural lands.

TRACING EARLY MARITIME SOUTHEAST ASIA THROUGH ARCHAEOLOGICAL ELEMENTS AND BENGAL’S CONTACT (400 BCE – 800 CE)

Some archaeological evidence from early Bengal (the eastern coastal region of India) found in the different sites of the mainland and maritime Southeast Asia is the vital source for grasping the historical study of the immense process of 'Indianisation.' The valuable archaeological elements are Northern Black Polished Wares, Rouletted Wares, Beads, Seals with Kharoshti-Brahmi scripts, prove of most elegant clothes and the concept of Temple Architecture from Bengal. This article is an endeavour to expose these elements to demonstrate the Bengal's connection behind the 'Indianisation’ process. In the initial stage (400 BCE to 800 CE) of ‘Indianisation,' Bengal kept a vital role in this massive course along with other Indian regions (Tamil Nadu, Arikamedu, Uttar Pradesh, Orissa). This issue has drawn the attention of scholars from the last few generations. In the ancient period, there were some direct maritime trade routes from Bengal to the Southeast Asian region. Traders from other parts of India also used the ports of Bengal on the way towards Southeast Asia because of its strategic location. Some striking indications may come out from the study that will specify the role of Bengal behind the 'Indianisation' process. This study followed the qualitative method with historical research that focuses on the archaeological findings, ancient literature, and secondary documents. Keywords: Bengal, Southeast Asia, Indianisation, trade, archaeological elements

Numerical analysis of the ground-mounted solar PV panel array mounting systems subjected to basic wind for optimum design

Comprehensive numerical modeling and investigations have been carried out to analyze the effect of wind loads on various solar array mounting frame structures using ANSYS 18 Workbench (Mechanical). Extensive damages of solar arrays and mounting frames have been reported the world over due to high winds. In this study, six array mounting frame types have been considered, subjected to the basic wind of 55 m/s specified for coastal regions of India. India has six basic wind speed zones ranging from 33 m/s to 55 m/s. Many utility-scale solar farms installed in this region are susceptible to high winds. Solar arrays considered of dimension 6 m × 4 m consisting of 12 photo-voltaic (PV) panels each of size 1 m × 2 m, with panel tilt angle varying from 10° to 50°. Wind load subjected to the PV panels in the solar array considered as normal pressure force over the top and bottom surfaces to simulate forward and backward wind direction. Three different materials with their respective mechanical properties, i.e., structural steel channel for mounting truss members, aluminum casing to encapsulate PV panels, and plexiglass sheet for PV panels, were considered and simulated. Wind pressure forces have been determined, using respective net wind pressure coefficients, induced by respective wind speed and tilt angle. Maximum deformation and maximum stresses were determined by modeling and simulation in ANSYS Workbench and compared the results with various array mounting system arrangements for each case of panel tilt angle subjected to both forward and backward wind incidence.

Tide-rainfall flood quotient: an incisive measure of comprehending a region’s response to storm-tide and pluvial flooding

It is undeniable that coastal regions worldwide are facing unprecedented damages from catastrophic floods attributable to storm-tide (tidal) and extreme rainfall (pluvial). For flood-risk assessment, although recognizing compound impact of these drivers is a conventional practice, the marginal/individual impacts cannot be overlooked. In this letter, we propose a new measure, Tide-Rainfall Flood Quotient (TRFQ), to quantify the driver-specific flood potential of a coastal region arising from storm-tide or rainfall. A set of inundation and hazard maps are derived through a series of numerical and hydrodynamic flood model simulations comprising of design rainfall and design storm-tide. These experiments are demonstrated on three different geographically diverse flood-affected coastal regions in India. The new measure throws light on existing knowledge gaps on the propensity of coastal flooding induced by the marginal/individual contribution of storm-tide and rainfall. It shall prove useful in rationalizing long-term flood management strategies customizable for storm-tide and pluvial dominated global coastal regions.

Kinetic studies of partially purified lipase from marine actinomycete streptomyces acrimycini ngp 1

This study was focused on partial purification and characterization of lipase from Streptomyces acrimyciniNGP 1, isolated from marine sediment of south Indian coastal region. In purification steps, 4.53 fold purification was achieved after 85% ammonium sulphate precipitation with 0.97 percent recovery. In further purification steps, 1.33 fold purification was achieved by Sephadex G-100 chromatography with 1.61 percent of recovery. The specific activity of purified enzyme was 1525 U/mg. Zymogram of crude enzyme on native-PAGE presented bands with lipase activity of molecular weight and Isoelectric point were 50 kDa and 7.4 respectively. These features render this lipase of interest as a biocatalyst for applications such as biodiesel production and detergent formulations.

Phytochemical Screening and Effect of Cymodocea serrulata on HepG2-Human Hepatocellular Carcinoma Cell Line

Cymodocea serrulata, a seagrass commonly known as karumbupassi has been used as a food and also as a medicine by coastal region people and by fishermen while traveling in the sea. It is used as a tranquilizer for babies as it has a soothing quality, it helps during pregnancy and against cough and malaria. C.serrulata is seen abundant in South Indian coastal region. Although there is a report on the antibacterial, antioxidant, and anti-inflammatory property of C.serrulata, there are no evident details on phyto-compounds present in it. Invitro antiproliferative test was performed by MTT (methylthiozoltetrazolium) assay method against HePG2 celline of liver cancer cells. MTT assay is a colorimetric assay used for the determination of cell proliferation and cytotoxicity, based on reduction of the yellow colored water soluble tetrazolium dye MTT to formazan crystals. Mitochondrial lactate dehydrogenase produced by liver cells reduces MTT to insoluble formazan crystals, which upon dissolution into an appropriate solvent exhibits purple color, the intensity of which is proportional to the number of viable cells and can be measured spectrophotometrically at 570nm.

Climatology of landfalling atmospheric Rivers and associated heavy precipitation over the Indian coastal regions

AbstractThe Indian coastal regions encountered frequently by extreme weather events such as heavy precipitation events (HPE). In the present study, an assessment has been made to understand the climatological relationship between atmospheric rivers (ARs) and HPEs for Indian coastal regions. For this purpose, India Meteorological Department gridded rainfall dataset, and four different reanalyses datasets for the occurrence of ARs were analysed for different seasons during 1980–2015. The influence of ARs towards the cause of HPEs was stronger over the West coast (WC) compared to the East coast of India (ECI). Over the WC the association between HPE with ARs is ~40% (for rainfall events >124.4·mm·day−1) than East coast (EC) by ~28%. The 64.4–124.4·mm·day−1 events are higher over the WC by ~18% compared to ~5% over the EC. While for the events (<64.4·mm·day−1), the percentage of occurrence is moreover the WC (~7%) compared to the EC (~2%). The study reveals that ARs is in good correlation with the occurrence of HPE. Using Poisson regression model, investigated the relationship between the AR totals in the summer and Northeast monsoon and the large‐scale climate indices. A sufficiently significant negative (positive) dependency observed between ARs and the Southern Oscillation Index (SOI) (Indian Ocean Dipole [IOD] and Niño 3.4 indices) with a larger rate of AR occurrence associated with lower SOI values and larger frequency of AR occurrence associated with larger IOD and Niño 3.4 values for both the coasts of India.

Quantification of long-range transported aeolian dust towards the Indian peninsular region using satellite and ground-based data - A case study during a dust storm over the Arabian Sea

The Arabian Sea is an enclosed basin surrounded by land and is prone to receive large amount of aeolian dust from the continent. This can significantly impact surface water biogeochemical processes. In this study, an attempt has been made to quantify the amount of dust transported from Middle East region to Indian subcontinent (sampling site is Goa; 15.45°N 73.80°E; located in the northeast Arabian Sea) via the Arabian Sea. We identified a dust storm episode (02–10 April 2015) in the Arabian Peninsula and its propagation to the study site (Goa) using satellite data (MODIS and CALIPSO). The impact of the dust storm at Goa has been computed using ambient particulate matter concentration and satellite retrieved optical parameter. These observations were further substantiated using ground-based micro-pulse lidar measurement. The daily averaged lidar profile shows relatively high depolarization ratio (0.1–0.25), as well as high daily average backscatter coefficient (up to 0.08 Sr−1 Km−1) and extinction coefficient (up to 0.9 Km−1) during the storm period compared to non-dusty days. During this period, a two-layer (rich in non-spherical particle) structure with significantly high linear depolarization ratio is observed, indicating the impact of the dust storm at the coastal region of India. Ambient mass concentration of dust estimated using CALIPSO profile are comparable with the gravimetric mass measured from high volume sample collection. The back-trajectory analysis further supports the advection of air-mass from the Middle East to Eastern Arabian Sea. This study highlight the significant role of long-range transport in impacting dust load at the remote/receptor sites.

Impact of 2004 co-seismic coastal uplift on the mangrove cover along the North Andaman Islands

The December 2004 earthquake and the subsequent tsunami have incurred devastating impacts on vital habitats along the Indian coastal region, where few of them are irreversible. The earthquake has uplifted the northern Andaman coast, resulting in a drastic reduction of tidal water influx into the adjoining mangrove-laden mudflats. Satellite images of the period from 2003 to 2019 were used to assess the impact of coastal upliftment on the northern Andaman mangroves. Through satellite data analysis, we report a loss of 6500 ha of northern Andaman mangroves. Tidal hydrodynamics simulation under the post-earthquake scenario showed a vast area of mudflats deprived of tidal influx. This reduction in the tidal inundation has incurred a gradual and permanent mangrove area degradation. The earthquake impact on the mangroves was not spontaneous, but a gradual process, where the mangroves were intact until Mach 2006. The earthquake and the resultant coastal uplift have significantly altered the coastal geomorphology as well as the plant demography of the study area. Field visit revealed the terrestrial vegetation growth along the erstwhile mudflats, and vast areas of mangrove peat are observed, surrounded by successions of marshy and terrestrial plants. As mangroves are preferred habitat for diverse marine and terrestrial organisms and act as a vital food source and juvenile shelters for various fish species, the extensive loss of mangrove area may adversely affect a large scale biological ecosystem.

Application of Crop-residue Biomass as a Catalyst for Bio-diesel Production from Waste Cooking Oil

To produce biodiesel economically, one should select an appropriate feedstock and catalyst. Waste cooking oil is available after frying various types of food items in India. Catalyst is required to be heterogeneous. India produces a great number of crop residues every year. They need to be utilized to avoid disposal issues. The crop residue, coconut coir is available from food processing industries, especially in the coastal regions of India. It is the source of carbon. So, it was selected as a catalyst. The coconut coir was activated by NaOH, followed by sulphonation. The resulting catalyst was used to produce biodiesel using waste cooking oil. The formations of biodiesel were studied using alcohol to oil ration (A:O), time of reaction, reaction temperature, and catalyst loading. At the optimized conditions of these parameters, biodiesel yield was more than 90%. The biodiesel thus synthesized was characterized in terms of fuel properties, namely, calorific values, flash point, density, viscosity, acid value, cloud point, pour point, and cetane number. These values were compared with the standard ones.

A Review on Antidiabetic Properties of Indian Mangrove Plants with Reference to Island Ecosystem.

Mangrove ecosystem has many potential species that are traditionally used by the coastal communities for their traditional cure for health ailments as evidenced by their extensive uses to treat hepatic disorders, diabetes, gastrointestinal disorders, anti-inflammation, anticancer, and skin diseases, etc. In recent times, the diabetes mellitus (DM), a serious physiological disorder all over the world, occur due to the relative or complete deficiency of insulin in the body, characterized by an abnormally high blood glucose level. India has a rich traditional knowledge on plant-based drug formulations that are protective and curative for many health ailments. In this context, we aimed to compile the works done on the antidiabetic activities of mangrove species from Indian coastal regions especially on Andaman and Nicobar Islands as well as some recent works reported from other countries. A total of 126 published articles and 31 mangrove species related pieces of information were gathered with reference to antidiabetic properties of mangroves. This review summarizes the chemical structures, molecular formula, molecular weight, and their biological activities with an aspiration that it might be helpful for the future bioprospecting industries who are interested in develop the natural drugs for DM.

Service life assessment of chloride affected bridge located in coastal region of India considering variation in the inherent structural parameters

Deterioration of RC bridges due to chloride induced corrosion is a grave concern worldwide. It occurs essentially, when the reinforcement embedded in concrete is exposed to marine or aggressive environments. Over the past few decades, many studies aimed at determining the parameters influencing the service life of structures affected by reinforcement corrosion. The aim of the present work is to put forward a reliable and simple service life model for predicting the useful life or period of RC bridges affected by chloride ingress and to validate the output of the model with the deterioration of an existing RC bridge structure. The application of the service life model has been done in an Indian bridge in the context of coastal environment. Parametric studies have been conducted in the model for examining the effect of various parameters such as water-cement ratio, reinforcement diameter, cover thickness, type of binder and corrosion rate on the variation of service life of the RC bridge structure. The results of the parametric study explained in a detailed manner so as to get an actual insight of the structural degradation mechanism for structures exposed to chemically aggressive environments.

Attenuation of Wave Energy Due to Mangrove Vegetation off Mumbai, India

Coastal regions of India are prone to sea level rise, cyclones, storm surges, and human-induced activities, resulting in flood, erosion, and inundation, and some of these impacts could be attributed to climate change. Mangroves play a very protective role against some of these coastal hazards. The primary aim of the study was to estimate wave energy attenuation by mangrove vegetation using modeling, and to validate the model results with measurements conducted off Mumbai coast, where a mangrove forest is present. Wave measurements were carried out from 5–8 August 2015 at three locations in a transect normal to the coast using surface-mounted pressure-level sensors in spring tide conditions. The measured data presented wave height attenuation of the order of 52%. Model set-up and sensitivity analyses were conducted to understand the model performance with respect to vegetation parameters. It was observed that wave attenuation increases with an increase in drag coefficient, vegetation density, and stem diameter. For a typical set-up in the Mumbai coastal region having a vegetation density of 0.175 per m2, stem diameter of 0.3 m, and drag coefficient varying from 0.4 to 1.5, the model reproduced attenuation ranging from 49% to 55%, which matches reasonably well with the measured data. Spectral analysis performed for the cases with and without vegetation very clearly portrays energy dissipation in the vegetation area. This study also highlights the importance of climate change and mangrove vegetation.

Seawater intrusion and submarine groundwater discharge along the Indian coast

Intrusion of seawater into the coastal aquifers is a major concern as it affects the quality of groundwater. The objective of this study is to delineate the extent of seawater intrusion in the Indian coast based on previous studies and estimate the area as well as locations of seawater intrusion and submarine groundwater discharge based on the groundwater level of the years 2007 and 2017. Several researchers have reported seawater intrusion in the coastal regions of India by different methods of investigation. These studies indicate that the east coast of India is affected greater than the west coast by seawater intrusion. The maximum extent (about 14 km) of seawater intrusion in India is reported in regions north of Chennai. It is estimated that around 7% of the total coastal area is affected by seawater intrusion, where groundwater is below mean sea level. Around 57% of the coastal area of India has groundwater level in the range from 0 to 10 m msl. Future research needs to focus on the areas where seawater intrusion and submarine groundwater discharge were identified based on this study.

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

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.