scholarly journals Influência da orientação de praia na retração da linha de costa induzida por marés de tempestade: Armação e Canasvieiras, Ilha de Santa Catarina - SC

2020 ◽  
Vol 13 (4) ◽  
pp. 1730 ◽  
Author(s):  
Karine Bastos Leal ◽  
Jarbas Bonetti ◽  
Pedro De Souza Pereira
Keyword(s):  
Spatial Models ◽  
Storm Surges ◽  
Shoreline Change ◽  
Wave Climate ◽  
Sandy Beaches ◽  
Santa Catarina ◽  
Digital Shoreline Analysis System ◽  
Analysis System ◽  
Tidal Characteristics ◽  
Polygon Method

Os processos de recuo da linha de costa em praias arenosas oceânicas estão comumente relacionados à ocorrência de marés de tempestade e agravados pelas construções sobre o limite superior de praia. Neste contexto, o trabalho apresentado quantificou a variabilidade da linha de costa de duas praias urbanizadas, Armação e Canasvieiras, situadas no sul do Brasil, que possuem orientações distintas ao clima de ondas, e relacionou sua exposição às marés de tempestade registradas entre os anos de 2009 e 2018. Para isso foram datadas e caracterizadas as marés de tempestade quanto às ondas, maré e ventos durante sua ocorrência. A variação da linha de costa foi calculada por meio do Método do Polígono de Mudança e do DSAS, que representam as variações a partir de modelos espaciais distintos. Os resultados mostram que houve recuo do limite superior nas duas praias e que o mesmo está relacionado às ocorrências de marés de tempestade. A praia da Armação apresentou recuo de até -4 m/ano e na praia de Canasvieiras registrou-se recuo de até -1m/ano. Constatou-se que na praia mais exposta, Armação, as marés de tempestade estão associadas às ondulações de SE e ventos de S. Por outro lado, os eventos na praia de Canasvieiras estão associados às ondulações de NE e ventos de N, tendo em ambas sido registrados durante as marés de sizígia. Nesta praia mais abrigada os eventos ocorrem sob condições meteo-oceanográficas particulares e podem igualmente causar impactos. Influence of beach orientation on shoreline retreat induced by storm surges: Armação and Canasvieiras, Ilha de Santa Catarina – SC A B S T R A C TCoastal retreat processes in oceanic sandy beaches are commonly related to storm surges and intensified by urbanization on the upper beach limit. In this research, shoreline variability was quantified in an interannual basis between 2009 and 2018 in two urbanized beaches in southern Brazil. Both Armação and Canasvieiras beaches have different orientations and exposures to the regional wave climate, but historically present severe wave-induced damage reports. The study was carried out based on the Change Polygon Method and the Digital Shoreline Analysis System (DSAS), two distinct shoreline change approaches based on different spatial models. The identified historical storm surges were discriminated according to waves, winds and tidal characteristics during their occurrence. It was concluded that the observed upper limit retreats in both beaches were, in fact, induced by storm surges. Due to its orientation, Armação beach is exposed to storm surges with SE waves and S winds. During the analyzed period, this beach showed a retreat up to -4 m/year. On the other hand, the events at Canasvieiras beach were associated with NE waves and N winds, showing a retreat up to -1 m/year. All the analyzed storm surge events occurred during spring tides and were concentrated in autumn. Although Armação beach is more exposed to storm surges due to its orientation, Canasvieiras beach, even with its sheltered shoreline orientation, can also be impacted depending on the storm surges characteristics.Keywords: Wave climate. The Change Polygon Method. Digital Shoreline Analysis System.

Shoreline Change Detection and Forecast along the Yancheng Coast Using a Digital Shoreline Analysis System

Wetlands ◽  
2021 ◽  
Vol 41 (4) ◽  
Author(s):  
Dandan Yan ◽  
Xiuying Yao ◽  
Jingtai Li ◽  
Liping Qi ◽  
Zhaoqing Luan
Keyword(s):  
Change Detection ◽  
Shoreline Change ◽  
Digital Shoreline Analysis System ◽  
Analysis System

Rapid detection of changes in the riverbanks of Laigiang river of the South Central Coast Vietnam: A methodology based on Digital Shoreline Analysis System and Sentinel-2

2021 ◽  
Vol 14 (11) ◽  
pp. 13-24
Author(s):  
Anh Tu Ngo ◽  
Stéphane Grivel ◽  
Thai Le Phan ◽  
Huu Xuan Nguyen ◽  
Trong Doi Nguyen
Keyword(s):  
Linear Regression ◽  
Shoreline Change ◽  
The South ◽  
Central Coast ◽  
Shoreline Changes ◽  
South Central ◽  
Digital Shoreline Analysis System ◽  
Analysis System ◽  
End Point Rate ◽  
Sentinel 2

The research focuses on using Sentinel-2 that can be integrated with the Digital Shoreline Analysis System (DSAS) as an effective tool for the determination of changes in the riverbanks and using linear regression to predict shoreline changes. The research applied the assessment of shoreline changes in the period of 2015- 2020 and forecast to 2025 in Laigiang river of the South Central Coast region of Vietnam. Based on the DSAS tool, parameters such as Shoreline Change Envelope (SCE), Net Shoreline Movement (NSM), End Point Rate (EPR) and Linear Regression Rate (LRR) were determined. The analysis results show that the accretion process in the Laigiang river in the period of 2015-2020 with the accretion area ranges from 81.47 ha. Meanwhile, the area of shoreline erosion only fluctuates around 54.42 ha. The rhythm of evolution is a determinant element for this transitional system.

scholarly journals Shoreline Change Analysis of Pontang Cape of Serang Regency of Banten Province

Omni-Akuatika ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 90
Author(s):  
Abdurrahman Al Farrizi ◽  
Ankiq Taofiqurohman ◽  
Subiyanto Subiyanto
Keyword(s):  
Coastal Zone ◽  
Shoreline Change ◽  
Sand Mining ◽  
Change Analysis ◽  
Factors Affecting ◽  
Shoreline Changes ◽  
Sea Sand ◽  
Digital Shoreline Analysis System ◽  
Analysis System ◽  
Shoreline Change Analysis

Coastal areas, being vulnerable to environmental problems, have one of the most frequent problems which are the change in the shorelines. Shoreline changes, namely abrasions, can cause problems such as land degradations or loss of land in a coastal zone. This problem occurs in many areas, one of which is Pontang Cape. This study aims to determine the distance and rate of shoreline changes that occured in the Cape and its surroundings, as well as explaining the analysis points based on similar studies that had been conducted. This research used ArcMap software and Digital Shoreline Analysis System (DSAS) toolset to determine the distance and rate of shoreline changes for 19 years (1999-2018). Based on the results, there were two shoreline segments where different phenomena of shoreline change took place, namely Banten Bay (accretion) and Pontang Cape-Lontar (abrasion). The most likely causes of changes in the shorelines are sediment runoffs from rivers that lead to bay and sediment transports that affect Banten Bay accretions, while sea sand mining and conversions of mangrove swamps into fishery ponds are factors affecting abrasions in Pontang Cape.Keywords: Abrasion, Accretion, Pontang Cape, Banten Bay, DSAS

scholarly journals Caracterização dos setores erosivos e deposicionais da linha de costa de Icapuí (CE) com base em produtos de sensoriamento remoto e técnicas de geoprocessamento

2020 ◽  
Vol 13 (1) ◽  
pp. 143
Author(s):  
Cláudio Ângelo Da Silva Neto ◽  
Cynthia Romariz Duarte ◽  
Michael Vandesteen Silva Souto ◽  
Eduardo Viana Freires ◽  
Willamys Rangel Nunes de Sousa ◽  
...  
Keyword(s):  
Far East ◽  
Shoreline Change ◽  
Temporal Analysis ◽  
Coastal Zones ◽  
Dynamic Features ◽  
Coastal Morphology ◽  
Erosion And Deposition ◽  
Digital Shoreline Analysis System ◽  
Analysis System ◽  
Landsat Satellite

A importância das zonas costeiras implica na necessidade de contínuos estudos relacionados ao monitoramento de seus processos. Neste contexto, a linha de costa representa uma das feições mais dinâmicas, e sua variabilidade é um indicador da erosão ou deposição costeira. A fim de avaliar as tendências de mudança da linha de costa do município de Icapuí, localizado no extremo leste do estado do Ceará, este trabalho envolveu a utilização de imagens orbitais do satélite Landsat, compondo uma série temporal de 30 anos com intervalos de cinco anos entre cada cena. Foram aplicados o Método de Mudança do Polígono e o Digital Shoreline Analysis System (DSAS) na caracterização da linha de costa, quantificando suas taxas de variação e balanço sedimentar em área. A área total foi setorizada em quatro porções, utilizando a morfologia costeira como critério de segmentação. Os resultados indicaram a existência de três hotspots de erosão e deposição, relacionados à desembocadura do riacho Arrombado, no setor leste; à desembocadura do estuário Barra Grande, que separa os setores centrais leste e oeste; e ao promontório de Ponta Grossa, que condiciona uma inflexão da linha de costa no setor oeste. Cada um destes setores apresenta dinâmica de deposição a barlamar e erosão a sotamar, com destaque para os processos acentuados de retrogradação entre as praias de Barreiras de Baixo e Barrinhas, no setor central oeste, e a forte dinâmica deposicional da praia de Ponta Grossa, no setor oeste. Identification of the erosive and depositional sectors of the Icapuí (CE) shoreline based on remote sensing products and geoprocessing techniques A B S T R A C TThe importance of coastal zones implies the need for continuous studies related to the monitoring of their processes. In this context, the shoreline represents one of the most dynamic features, and its variability is an indicator of erosion or coastal deposition. In order to evaluate the changing trends of the coast of the Icapuí city, located in the far east of the state of Ceará, this work involved the use of Landsat satellite orbital images, composing a 30-year time series with five-year intervals between each scene. The Polygon Change Method and the Digital Shoreline Analysis System (DSAS) were applied to characterize the shoreline, quantifying its variation rates and sedimentary balance in area. The total area was divided into four portions, using coastal morphology as a segmentation criterion. The results indicated the existence of three erosion and deposition hotspots, related to the Arrombado stream inlet, in the eastern sector; the Barra Grande estuary inlet, which separates the central east and west sectors; and the Ponta Grossa promontory, which conditions a shoreline inflection in the western sector. Each of these sectors has a deposition dynamic to updrift and erosion to downdrift, with prominence to the accentuated processes of retrogradation between the Barreiras de Baixo and Barrinhas beaches, in the central west sector, and the strong depositional dynamics of Ponta Grossa beach, in the west sector.Keywords: coastal erosion; shoreline change; temporal analysis.

scholarly journals SPATIAL ANALYSIS OF SHORELINE CHANGES IN THE COASTAL OF SUBANG DISTRICT, WEST JAVA

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Ankiq Taofiqurohman ◽  
M. Furqon Azis Ismail ◽  
M. Furqon Azis Ismail ◽  
M. Furqon Azis Ismail
Keyword(s):  
Regression Analysis ◽  
Spatial Analysis ◽  
Field Survey ◽  
Shoreline Change ◽  
Residential Construction ◽  
Maximum Width ◽  
Shoreline Changes ◽  
Digital Shoreline Analysis System ◽  
Analysis System ◽  
System Program

<p>ABSTRACT</p> <p>Observation of coastal shoreline changes in the Subang District was conducted using Digital Shoreline Analysis System Program based on the satelite images of Landsat TM from 1996 to 2010. The purpose of this study was to determine the distance of shoreline change. Methods used in this study were field survey and regression analysis of shoreline data. The results of this study indicated the existence of a region experiencing accretion and abrasion. The maximum width of accretion of the coast was 1,051.55 meter while the maximum abration was 1,206.83 meter. Coastal shoreline change in Subang District occurred mainly due to the development activities such as residential construction, altering the coastal mangrove to ponds and rice paddies, and sediment transport from the river around Subang District.</p> <p>Keywords: shoreline, Subang District, satelite images, accretion, abration</p>

SPATIAL ANALYSIS OF SHORELINE CHANGES IN THE COASTAL OF SUBANG DISTRICT, WEST JAVA

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Ankiq Taofiqurohman ◽  
M. Furqon Azis Ismail ◽  
M. Furqon Azis Ismail ◽  
M. Furqon Azis Ismail
Keyword(s):  
Regression Analysis ◽  
Spatial Analysis ◽  
Field Survey ◽  
Shoreline Change ◽  
Residential Construction ◽  
Maximum Width ◽  
Shoreline Changes ◽  
Digital Shoreline Analysis System ◽  
Analysis System ◽  
System Program

ABSTRACT Observation of coastal shoreline changes in the Subang District was conducted using Digital Shoreline Analysis System Program based on the satelite images of Landsat TM from 1996 to 2010. The purpose of this study was to determine the distance of shoreline change. Methods used in this study were field survey and regression analysis of shoreline data. The results of this study indicated the existence of a region experiencing accretion and abrasion. The maximum width of accretion of the coast was 1,051.55 meter while the maximum abration was 1,206.83 meter. Coastal shoreline change in Subang District occurred mainly due to the development activities such as residential construction, altering the coastal mangrove to ponds and rice paddies, and sediment transport from the river around Subang District. Keywords: shoreline, Subang District, satelite images, accretion, abration

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