Spatio -Temporal Analysis of Shoreline Changes along Makran Coast Using Remote Sensing and Geographical Information System (original) (raw)
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Analysis of Shoreline Shift using Satellite Imagery near Makassar City
Journal of Geoscience, Engineering, Environment, and Technology
Shoreline shift have occurred in the Coastal region of Makassar City in recent years due to abrasion and accretion. Spatial temporal feature extraction of the Makassar City Region has been carried out using remote sensing techniques withRadiometri, Geometric Corrections and Composite Imagein the Landsat image dataset in 2009 and 2019. This study aims to analyze shoreline shift near Makassar City with remote sensing technology using Landsat imagery data, based on multi-temporal data with visual and digital analysis techniques between 2009 and 2019. This research contributes to local and central government as baseline data (data base) in making decisions for handling coastal areas. The results showed that the length of the Makassar City coastline without including the coastline length of the islands separated from land in a row that is equal to 37.79 km in 2009. While in 2019 there was a significant change that is 49.82 km. This shows the addition of a coastline of 12.03 km in the s...
Shoreline Change Monitoring Along the South Gujarat Coast Using Remote Sensing and Gis Techniques
2013
The present study is to investigate the shoreline changes along the South Gujarat coast using multi temporal satellite images of Landsat MSS (1972), Landsat TM (1990), Landsat ETM (2001) and IRS P6, LISS-IV (2011). The coastal stretch of the study area in 124 km and it is distributed in part of three district of Surat, Navsary and Valsad district in Gujarat and part of Daman union terrotery. The shoreline consider as the high tide line (HTL) as it is easily photo interpreted and field located. Visual interpretation of satellite imageries has been carried out to demarcate the HTL based on various geomorphology and land use & land cover features. The satellite data has been process in ERDAS IMAGINE s/w and HTL is demarcated in ARC Map s/w. The study found that the coastal erosion is a major problem in the study. Presently, (i.e., 2001 to 2011time period) about 83.06 % of the South Gujarat coast is eroding, about 10.15% of coast is stable and about 6.78 % of the coast is accreting in n...
Indian Journal of Geo Marine Sciences, 2021
Shoreline change study is very challenging for any coastal scientists because of its dynamic changes. Erosion and accretion processes directly control the shoreline and coastal landforms. The present study is attempted to assess the shoreline changes between the Vembar and Tharuvaikulam coast of the Thoothukudi district, Tamil Nadu, India. Both the places were regarded as two zones viz. Vembar and Tharuvaikulam zone. These zones are further subdivided into three grids to understand and mark the erosion and deposition zones. The shorelines were digitized from satellite images of Landsat-5 (1997) and Landsat-8 (2018), and also the base details were extracted from a survey of India (SOI, 1968). These shorelines were taken to Geographic Information System for overlay analysis to determine the extent of erosion and accretion in the study area. The result of this study shows that during the period 1968-1997, Vembar and Tharuvaikulam zones have noticed accretion with a rate of 6.9 m 2 /y and 4.5 m 2 /y, respectively. Whereas, during the period 1997-2018, the Vembar zone was subjected to erosion with a rate of-1 m 2 /y. While in the Tharuvaikulam zone, the accretion process has reduced with a rate of 0.1 m 2 /y. The study results have shown that the Vembar zone has undergone erosion, whereas; the Tharuvaikulam zone has undergone both erosion and accretion. The accretion process rate is less compared to the erosion process during 1968-1997. The study concludes that the erosion is increasing due to natural and human intervention.
Arabian Journal of Geosciences, 2013
Shoreline is one of the rapidly changing landform in coastal area. So, accurate detection and frequent monitoring of shorelines are very essential to understand the coastal processes and dynamics of various coastal features. The present study is to investigate the shoreline changes along the coast between Kanyakumari and Tuticorin of south India, where hydrodynamic and morphologic changes occur continuously after the December 2004 tsunami. Multi-date satellite data of Indian Remote Sensing (IRS) satellites (1999, 2000, 2003, 2005, and 2006) are used to extract the shorelines. The satellite data is processed by using the ERDAS IMAGINE 9.1 software and analyzed by ArcGIS 9.2 workstation. The different shoreline change maps are developed and the changes are analyzed with the shoreline obtained from the Survey of India Toposheets (1969). The present study indicates that accretion was predominant along the study area during the period 1969-1999. But recently (from 1999 onwards), most of the coastal areas have experienced erosion. The study also indicates the reversal of shoreline modifications in some coastal zones. The coastal areas along the headlands have experienced both erosion and accretion. Though the coastal erosion is due to both natural and anthropogenic activities, the coastal zones where sand is mined have more impacts and relatively more rate of erosion than that of other zones. Improper and in-sustainable sand mining leads to severe erosion problem along this area. So the concept of sustainable management should be interpreted in the management of the near-shore coastal sand mining industry.
Shoreline Change Threat to Coastal Zone: A Case Study of Karwar Coast
Shoreline is a triple interface of air, water and land and also the wet and dry boundary between land and sea. It is key geo-indicator of coastal environmental resource threats within the coastal zone. Shoreline change leads to causes for change in natural habitats, infrastructure change in the coastal zone and so on. These changes which rise to serious issues those are related to the coastal zone. The present study is carried out for the Karwar Coast, West Coast of India, using remote sensing and GIS Techniques. LANDSAT-8 remote sensing data which is available from 2013, coupled with GIS techniques used for the shoreline analysis. The acquired image was subjected to layer stacking to remove errors from raw image data using ERDAS IMAGINE 2014 tool and analyzed by ArcGIS 10.3 tool. For extraction of shoreline the High-Water Line (HWL) considered and visual interpretation of satellite imageries has been carried out to segregate the HWL, in addition to this to collect the ground truth data, the shoreline track is carried out using Trimble GPS (Global Positioning System) device. Digital Shoreline Analysis System (DSAS) were used to find rates of change of shoreline such as End Point Rate (EPR), Net Shoreline Movement (NSM). Results were concentrated on EPR as the analysis was carried for every two years from 2013 to 2017 of postmonsoon period to find out erosion and accretion. It is found to be Tagore beach is changed from accretion zone to erosion zone, and Devbagh beach is experiencing erosion. The study finds that the shoreline change is threatening to Karwar coastal zone.
Assessment of shoreline changes ofAlibag coast (Maharashtra, India)using remote sensing and GIS
2015
The analytical and data integration capability of GIS and the spatial, temporal, spectral and radiometric resolutions of remote sensing help to gain insights into the biophysical systems. These technologies are widely used in geomorphological studies. Remote sensing and GIS technologies were used to study the shoreline changes of Alibag in Raigad district of Maharashtra, India, which lies between 18° 30’N and 18° 45’ N latitude, and 72° 45’ E and 73° 00’E longitude. IRS-1D LISS III satellite image (2005) and Survey of India (SOI) toposheet (1971) with the map ID 47 B/14 both on the scale 1: 50,000 were used in the change detection study. GIS software GRAM++ and ArcView 3.2 were used for the analysis. Total areas of erosion and accretion along the Alibag coast were found to be 3.81 km2 and 6.5 km2 respectively during the last 34 years (1971 to 2005) Ground-truthing validated the findings of the study. Anthropogenic activities like land reclamation, increased human settlements, indust...
Extraction of shoreline changes in Selangor coastal area using GIS and remote sensing techniques
Journal of physics, 2017
Nowadays, coastal zones are facing shoreline changes that stemming from natural and anthropogenic effect. The process of erosion and accretion will affect the physical environment of the shoreline. Therefore, the study of shoreline changes is important to identify the patterns of changes over time. The rapid growth of technology nowadays has facilitated the study of shoreline changes. Geographical Information System (GIS) alongside Remote Sensing (RS) technology is a useful tool to study these changes due to its ability to generate information, monitoring, analysis and prediction of the shoreline changes. Hence, the future projection of the trend for a specific coastal area can be done effectively. This study investigates the impact of shoreline changes to the community in Selangor area which mainly focus on the physical aspects. This study presents preliminary result using satellite image from SPOT 5 to identify the shoreline changes from the year 1984 to 2013 at Selangor coastal area. Extraction of shoreline from satellite image is vital to analyze the erosion and accretion along the shoreline area. This study shows that a shoreline change for the whole area is a categorized as a medium case. The total eroded and accretion of Selangor area from 1984 to 2013 is 2558 hectares and 2583 hectares respectively. As a result, Kapar, Jugra, Telok Panglima Garang and Kelanang are categorized as high risk erosion area. Shoreline changes analysis provides essential information to determine on the shoreline changes trends. Therefore, the results of this study can be used as essential information for conservation and preservation of coastal zone management.
Journal of Earth System Science, 2023
Shoreline changes have been monitored for the tropical West Coast of Maharashtra using the Survey of India (SOI) toposheet, Remote Sensing (RS) data, and its incorporation in the Geographical Information System (GIS) for the time period from 1980 to 2013. Indian Remote Sensing (IRS) Resource Sat (P6-R2) satellite data of 2013 year were geocoded using an image-to-image rectiBcation process with the help of permanent points on the ground. The registered satellite imageries were added in Arc GIS 10.3 software with a false colour composite (FCC) band combination (3:2:1) to get clear contrast of the land–water boundary. The toposheet and satellite imagery waterlines were digitised using the line feature in Arc GIS 10.3 software. The shorelines digitised for different years were overlaid, and polygons were created for every changed location to compute shoreline changes from 1980 to 2013 to quantify the rate of erosion or accretion along the shoreline under investigation. Computed results were validated through detailed ground observations. The obtained results indicate that *265 km (45.28%) of the coast is under erosion, *234.17 km (40.02%) under deposition and *85.97 km (14.70%) of the coast is stable. Maximum shoreline erosion is observed in the northern part extent from the Alibag to Shrivardhan and the deposition in the southern part of the coastal tract. The Maharashtra coast lost *1.65 km2 net area during 1980–2013. In some places, sand spits are growing or receding in response to coastal currents and storm events. The present pattern of shoreline changes is related to the physical setting of the shoreline, varying wind and wave climate and anthropogenic activity. Keywords. Shoreline changes; RS-GIS; erosion–accretion; Maharashtra coast.
Shoreline Change Detection of a Part of Thoothukudi Coast using Remote Sensing and GIS
— Coastal studies is a wide field, which mainly indicates the changes in the earth surface easily and clearly due to the actions that take place in its surface and subsurface rapidly due to various parameters like wind, wave, tides, eruption, faulting etc. All these help in, identifying the proper changes that take place in the area frequently. In the present study, the erosion and depositional activities that happened along the coastline from Thoothukudi to Vembar was studied in detail with the help of Geology, Geomorphology and Bathymetry and the Digital Shoreline Change Analysis technique and the shoreline changes for a time period of 22 years in the study area. From the field study the area under high erosion was noted and the area that has undergone deposition was determined. The area where remedial measures has to be taken is been noted and the places where vegetation has to be raised were also identified. Remedial measures include beach nourishment and dune grass planting in the study are suitable for the reduction of the erosion in the place. From the study, it is been confirmed that erosion occurs at a higher rate when compared with accretion in the area.