Recognition of bathymetry on the basis of color aerial photographs: Baltic shallow coastal zone studies

2018 ◽  
Author(s):  
Kazimierz Furmanczyk ◽  
Lukasz Cieszynski
Keyword(s):  
Coastal Zone ◽  
Aerial Photographs

scholarly journals Διαχρονική παρατήρηση των μεταβολών της ακτογραμμής τμήματος της παράκτιας ζώνης του νόμου Πιερίας και εκτίμηση των επιπτώσεων από την μελλοντική άνοδο της θαλάσσιας στάθμης

2005 ◽  
Vol 38 ◽  
pp. 182
Author(s):  
Κ. ΤΣΑΝΑΚΑΣ ◽  
Ε. ΚΑΡΥΜΠΑΛΗΣ ◽  
Ι. ΠΑΡΧΑΡΙΔΗΣ
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Coastal Zone ◽  
Global Climate ◽  
Aerial Photographs ◽  
Qualitative Assessment ◽  
Gis And Remote Sensing ◽  
Socioeconomic Environment ◽  
Area North ◽  
Remote Sensing Techniques

The aim of this study is to detect shoreline changes along part of the coastal zone of Piena during the time period between 1969 and 2000 using aerial photographs and satellite images. Additionally, a quantitative and qualitative assessment of the future sea-level rise (triggered by the global climate change) implications to the physical and socioeconomic environment of the area is attempted taking into account various sea-level rise scenarios. Retreating as well as prograding regions along the study area were defined and retreating/prograding rates for the time periods 1969-1987 and 1987-2000 were estimated using GIS and Remote Sensing techniques. Building activity rates for the coastal area of Paralia Katerinis were also estimated for the same periods. The coastline of the study area is retreating^ except than the area north of torrent Mavroneri where a progradation rate of 48 cm/year was estimated between 1969 and 1987. Retreating rate of the coast for the northern part of the area (Saltworks) is estimated to be 25 cm/year and 19 cm/yrear for the periods of 1969-1987 and 1987-2000 respectively. The broader study area is particularly vulnerable to a potential future sealevel rise due to the low-lying topography of the coastal zone and intensive socioeconomic activities such as tourism and commerce.

scholarly journals Recent and future trends of beach zone evolution in relation to its physical characteristics: The case of the Almiros Bay (Island of Crete, south Aegean Sea)

2013 ◽  
Vol 16 (1) ◽  
pp. 104-113 ◽  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Coastal Zone ◽  
Satellite Image ◽  
Aegean Sea ◽  
Aerial Photographs ◽  
Future Trends ◽  
Shoreline Retreat ◽  
Future Evolution ◽  
Wave Heights

<p>The present study investigates recent and future evolution of the beach zone of Almiros Bay, one of the most touristic developed beaches of north Crete, in relation to its morphodynamic setting and the anticipated sea level rise. The beach zone is exposed to northerly winds, with maximum wave heights and periods of 4.3 m and 9 s, respectively. The comparison of the aerial photographs (1982-1996) and a satellite image of 2007 have revealed an extended retreat of the beach zone, with its highest retreating rates (i.e. 0.6-0.8 m y-1 for the last 25 years) found at its central part. Moreover, an estimation of the future shoreline retreat, due to the anticipated sea level rise (i.e. 0.38 or 1 m for the year 2100), has shown that there is a potential coastal zone loss from 48% up to 100%, respectively. A gross evaluation of the economical impact due to the aforementioned beach loss accounts to approximately from $ 270,000 up to $ 720.000, annually.</p>

scholarly journals Assessment of potential beach erosion risk and impact of coastal zone development: a case study on Bongpo–Cheonjin Beach

2021 ◽  
Vol 21 (12) ◽  
pp. 3827-3842
Author(s):  
Changbin Lim ◽  
Tae Kon Kim ◽  
Sahong Lee ◽  
Yoon Jeong Yeon ◽  
Jung Lyul Lee
Keyword(s):  
Survey Data ◽  
Coastal Zone ◽  
Parabolic Type ◽  
Sediment Supply ◽  
Beach Erosion ◽  
Aerial Photographs ◽  
Erosion Risk ◽  
Risk Curve ◽  
Zone Development ◽  
Beach Survey

Abstract. In many parts, coastal erosion is severe due to human-induced coastal zone development and storm impacts, in addition to climate change. In this study, the beach erosion risk was defined, followed by a quantitative assessment of potential beach erosion risk based on three components associated with the watershed, coastal zone development, and episodic storms. On an embayed beach, the background erosion due to development in the watershed affects sediment supply from rivers to the beach, while alongshore redistribution of sediment transport caused by construction of a harbor induces shoreline reshaping, for which the parabolic-type equilibrium bay shape model is adopted. To evaluate beach erosion during storms, the return period (frequency) of a storm occurrence was evaluated from long-term beach survey data conducted four times per year. Beach erosion risk was defined, and assessment was carried out for each component, from which the results were combined to construct a combined potential erosion risk curve to be used in the environmental impact assessment. Finally, the proposed method was applied to Bongpo–Cheonjin Beach in Gangwon-do, South Korea, with the support of a series of aerial photographs taken from 1972 to 2017 and beach survey data obtained from the period commencing in 2010. The satisfactory outcomes derived from this study are expected to benefit eroding beaches elsewhere.

scholarly journals ENVIRONMENTAL DEGRADATION OF THE COASTAL ZONE OF THE WEST PART OF NESTOS RIVER DELTA, N.GREECE

2017 ◽  
Vol 43 (2) ◽  
pp. 1074
Author(s):  
G. Xeidakis ◽  
A. Georgoulas ◽  
N. Kotsovinos ◽  
P. Delimani ◽  
E. Varaggouli
Keyword(s):  
High Resolution ◽  
Coastal Zone ◽  
Satellite Images ◽  
Rate Of Change ◽  
Water Flooding ◽  
Aerial Photographs ◽  
The West ◽  
Delta Coastline ◽  
High Resolution Satellite Images ◽  
High Dams

The coastal zone is a transitory zone between land and sea. Due to its importance to man, not only for its high food production but also for recreation, sea transportation and industrial activities, coastal zone receives high environmental pressure from him. This paper deals with degradation phenomena of the coastal zone in the west section of the River Nestos Delta, North Aegean Sea, with special stress on the geomorphological changes in the coastline. The length of the coastline in this part of river Nestos Delta (the Kavala- Chrisoupoli part), from Nea Karvali village to the west, up to the river mouth to the east, is around 35 km long. This section constitutes the biggest and more extended sector of the Nestos Delta; it is the section where the main course and the various branches of the river were located, in the past. Along the coastal zone of this section of the delta many lagoons, sand bars, spits, barrier islands, washover fans, etc. were developed in its geologic past. Some of these geoforms still exist, but the majority of them have been destroyed by physical and/or anthropogenic interventions. Two of the last interventions are the diversion and entrenchment of the river to the east, in early 50’s and the construction of two high dams in the river course inland, in 2000. These human interventions deprived this land of flooding waters and sediments resulting in: (a) drying of most of the river channels and courses crossing this area of the river’s delta, (b) erosion of the coastal landforms and retreat of the shoreline in the majority of the delta coasts. There are, of course, a few places along the coastline where deposition and accretion are still taking place. In more detail, along the coastline taken into consideration in the present paper, one can meet: • stretches with high erosion rates, like the Akroneri Cape (spit), the inner coastline of Keramoti bay (Kokala -Piges coast), the Monastiraki coastline, etc, • stretches with high accretion rates like the Keramoti peninsula/spit, and • stretches at equilibrium or low rate of change like the barrier (spit) west of Akroneri Cape up to Nea Karvali coast and a short stretch of the coastline south-east of Keramoti peninsula. Comparing the Delta coastline of 1945 (from available aerial photographs) and the coastline of 2002 (from high resolution satellite images), before the construction of the Thisavros and Platanovrisi high dams (period 1945-2002), it has been estimated that: 88% of the delta and the adjacent coastlines has been accreted while only 12% has been eroded. In other words, there was a surplus of accretion by 76% and the delta was procreated. Comparing the Delta coastline of 2002 (from high resolution satellite images) and the coastline of 2007 (from high resolution D-GPS field measurements), after the construction of the dams (period 2002-2007), it has been estimated that: only 39% of the delta and the adjacent coastlines has been accreted while 61% has been eroded. In other words, there was a surplus of erosion by 22% and the delta began to retreat. This was due to Δελτίο της Ελληνικής Γεωλογικής Εταιρίας, 2010 Bulletin of the Geological Society of Greece, 2010 Πρακτικά 12ου Διεθνούς Συνεδρίου Proceedings of the 12th International Congress Πάτρα, Μάιος 2010 Patras, May, 2010 the great reduction (by almost 80%) of the river’s sediment load reaching to the sea. Thus, up to 2002, or so, the balance accretion – erosion in the whole delta coastline was positive, whereas after 2002 the erosion and retreat predominates in the delta’s coastline. The prevention of sediments and fresh water flooding in the delta area, has also affected the crops production in the fields in the vicinity of the delta as well as the fish output in the lakes and lagoons of the coastal zone.

Coastal changes through time is the only constant: Case study of west coast of Naxos Island, Cyclades, Greece

2021 ◽  
Author(s):  
Niki Evelpidou ◽  
Alexandros Petropoulos ◽  
Anna Karkani ◽  
Giannis Saitis
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Coastal Zone ◽  
Coastal Lagoons ◽  
Sand Dunes ◽  
Aerial Photographs ◽  
Western Coast ◽  
Residential Areas ◽  
Anthropogenic Pressures ◽  
The Impact

&lt;p&gt;Coastal areas include various landforms, such as dunes, lagoons and wetlands, which constitutes them as areas of particular environmental and geomorphological values. Coastal lagoons and dunes are of great environmental importance, given that, among others, they provide habitat for rare species of flora and fauna, but they also contribute to the protection of the coastal zone from sea level rise, storms, etc. Although these features are unique elements for sustainable development and are of great importance to the natural environment and economy, due to their relatively small size, they are one of the most vulnerable and threatened ecosystems. Such a case is the western coast of Naxos Island, hosting several wetlands bordering with low-lying sand dunes.&lt;/p&gt;&lt;p&gt;Naxos island lies in the center of the Aegean Sea, being part of the Cyclades Island group. The western coasts of Naxos include a number of natural features, which have been inherited from their palaeogeographical evolution over the last 10,000 years. Typically, the western coastal zone is composed of a sandy beach, bordered by low lying sand dunes, lagoons and an alluvial plain. These systems are becoming increasingly vulnerable, due to natural processes such as intensity of waves, but also due to human interventions that have blocked sediment input to the coastal zone and the increasing touristic development. The erosion of the dunes, the intense storms, the sea level rise, extreme events such as storms or tsunamis, and the increased tourist &quot;raid&quot;, will lead to marine flooding not only to the beach, but also to the lagoons and many acres of land (rural, residential areas).&lt;/p&gt;&lt;p&gt;The aim of our study is to assess the vulnerability of the western coasts of Naxos to sea level rise, considering both natural and anthropogenic pressures. For this purpose, we used a series of methodologies for the environmental and geomorphological study of the coastal zone and the shallow submarine area, which included: a) photointerpretation of aerial photographs from 1960 until today, b) systematic seasonal aerial monitoring by drone, since 2015, c) mapping of the coastal zone and topographic sections using DGPS and d) dune mapping and sampling, e) sampling of underwater beachrocks. Through our analysis we aim to better elucidate the impact of the relative sea level rise in the study area.&lt;/p&gt;

scholarly journals The synanthropisation of vascular plant flora of mires in the coastal zone (Kashubian Coastal Region, N Poland) – range, reasons for, and spatial characteristics

2014 ◽  
Vol 98 ◽  
pp. 1-55 ◽  
Author(s):  
Agnieszka Budyś
Keyword(s):  
Alien Species ◽  
Coastal Zone ◽  
Vascular Plant ◽  
Coastal Region ◽  
Aerial Photographs ◽  
Actual State ◽  
Raised Bog ◽  
Raised Bogs ◽  
Baltic Coast ◽  
Characteristic Features

The paper deals with symptoms, directions and actual state of anthropic transformation of the flora in various ecological types of peatlands in the coastal zone. The main purpose of the work was to define phases and characteristic features of flora’s change in particular mires types and point the reasons for this process. The research was conducted in eastern part of Polish Baltic Coast (Kashubian Coastal Region). Contemporary flora was recorded in 2000-2004. The floristic list was completed with all data from former research. Chosen features of environment were analysed using topographic and geological maps and aerial photographs. Correlation between flora differentiation and some features of environment were analysed with multivariate analyses (DCA, PCA, RDA,CA) and GIS technique. There were 958 species recorded in the total flora of studied area, 93 among them became locally extinct. The big share in contemporary flora have synanthropic species and plants of wide ecological amplitude. Geographically alien species stand for 24% of nowadays flora. The results show that due to anthropic pressure, coastal raised bogs and fens are presently a mosaic of secondary habitats with very high floristic diversity, however raised bog habitats are more resistant to alien species expansion than fens. Despite deep flora disturbances, such as eurytopisation or allochtonisation, contemporary flora of coastal peatlands still has some characteristic features connected with geology, ecological differentiation and geobotanical location.

scholarly journals Quantitative interpretation of risk potential of beach erosion due to coastal zone development

2021 ◽  
Author(s):  
Changbin Lim ◽  
Taekon Kim ◽  
Sahong Lee ◽  
Yoon Jeong Yeon ◽  
Jung Lyul Lee
Keyword(s):  
Coastal Zone ◽  
Coastal Erosion ◽  
Beach Erosion ◽  
Aerial Photographs ◽  
Base Line ◽  
Littoral Drift ◽  
Erosion Damage ◽  
Anthropogenic Development ◽  
Zone Development ◽  
Risk Potential

Abstract. Coastal erosion is more severe due to human-induced coastal zone development in addition to natural climate change. Anthropogenic development affecting coastal erosion is divided into three areas; watersheds, coastal waters, and coastal land areas. In this study, the ultimate effect of anthropogenic development on changes in the amount of sand, changes in the littoral drift, and changes in shoreline variability in these three planar areas is expressed as quantitative risk potential of beach erosion damage, defined as a change in the planar surface of the sand beach. The change in the amount of sand is due to the law of conservation of matter, and the littoral drift characteristic of sand is interpreted as a change in the main crest line at the breaking point, and the response characteristics of shoreline position is interpreted as change in the erodibility and recovery characteristics of beach sand. This quantitative method was applied to Bongpo-Cheonjin Beach of erosion grade D (frequency of erosion damage within 5 years) in Gangwon-do, Korea to identify the cause of erosion and evaluate the detailed applicability of this method. It was interpreted using a series of aerial photographs taken from 1972 to 2017 and survey data obtained from the erosion rating project started in 2010. In the erosion rating project, the GPS shoreline survey of 4 times per year and the sand sampling at the swash zones of base line at 150 m intervals are mainly carried out. We showed the feasibility of methodology evaluating the risk potential for beach erosion proposed in this study, and it can be expected that this method will be applicable to eroded beaches elsewhere.

scholarly journals Determining Long-Term Land Cover Dynamics in the South Baltic Coastal Zone from Historical Aerial Photographs

2021 ◽  
Vol 13 (6) ◽  
pp. 1068
Author(s):  
Andrzej Giza ◽  
Paweł Terefenko ◽  
Tomasz Komorowski ◽  
Paweł Czapliński
Keyword(s):  
Land Cover ◽  
Surface Area ◽  
Coastal Zone ◽  
Land Surface ◽  
Environmental Changes ◽  
Remote Sensing Data ◽  
Temporal Variations ◽  
Aerial Photographs ◽  
Tree Cover ◽  
Human Society

Coastal regions are dynamic environments that have been the main settlement destinations for human society development for centuries. Development by humans and environmental changes have resulted in intensive land cover transformation. However, detailed spatiotemporal analyses of such changes in the Polish Baltic coastal zone have not been given sufficient attention. The aim of the presented work is to fill this gap and, moreover, present a method for assessing indicators of changes in a coastal dune environment that could be an alternative for widely used morphological line indicators. To fulfill the main aim, spatial and temporal variations in the dune areas of the Pomeranian Bay coast (South Baltic Sea) were quantified using remote sensing data from the years 1938–2017, supervised classification, and a geographic information system post-classification change detection technique. Finally, a novel quantitative approach for coastal areas containing both sea and land surface sections was developed. The analysis revealed that for accumulative areas, a decrease in the land area occupied by water was typical, along with an increase in the surface area not covered by vegetation and a growth in the surface area occupied by vegetation. Furthermore, stabilized shores were subject to significant changes in tree cover area mainly at the expense of grass-covered terrains and simultaneous slight changes in the surface area occupied by water and the areas free of vegetation. The statistical analysis revealed six groups of characteristic shore evolutionary trends, of which three exhibited an erosive nature of changes. The methodology developed herein helps discover new possibilities for defining coastal zone dynamics and can be used as an alternative solution to methods only resorting to cross sections and line indicators. These results constitute an important step toward developing a predictive model of coastal land cover changes.

Sign in / Sign up

Export Citation Format

Share Document