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 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 COASTAL EROSION MANAGEMENT AT YUCATAN, MEXICO: ENGINEERING EFFORTS AND EXPERIENCES

2012 ◽  
Vol 1 (33) ◽  
pp. 8
Author(s):  
Mariana Berenice Gonzalez Leija ◽  
Enrique Alvarez del Rio
Keyword(s):  
Coastal Erosion ◽  
Local Community ◽  
Academic Research ◽  
Transport Processes ◽  
Coastal Development ◽  
Beach Erosion ◽  
Shore Protection ◽  
Littoral Drift ◽  
Property Owners ◽  
Positive Experiences

The coast of Yucatan, located in the Gulf of Mexico, is a fragile island barrier system where beach erosion has turned into a problem since the last 25 years. This, in combination with hurricane strikes (Gilbert (1988), Isidore (2002)), led to environmental damages along about 300 km, in 60 km of which, the coastal infra-structure is at risk; fact that decreased the coastal development. Mitigate the erosion required emergency protection works mainly made by beach property owners. The lack of planning and engineering design resulted in areas with high ero-sion rates and the destruction of neighboring beaches and properties. Among the most important causes that enhanced erosion phenomena along Yucatan are: construction of Progreso pier affecting littoral drift causing ero-sion at the west side beaches, shore normal rock-timber and sand-bags groins constructed empirically by property owners accelerating erosion and stimu-lating even more groin construction, during 90´s groin construction shifted to the east (up-drift) of Progreso Port, and in the last 25 years urban, touristic and fisher industries growth in the region, force the construction of jetties for small harbours along the coast. Axis Ingeniería, and academic research institutions, in conjunction with federal and state authorities the promotion of programs for beach rehabilitation consisting on groins removal and the use of soft solutions (i.e. structures based on geosynthetics for shore protection). The Progreso Beach 7 km nourishment has been one of the most successful efforts resulting in the the development of a stable beach for about 10 years, even without maintenance works. Based on local knowledge obtained with the use of measures that have disregarded the equilibrium of sediment transport processes; Axis Ingenieria used these experiences in combination with technical, environmental legal requirements, capabilities of the local community and socioeconomic tools to implement soft and easily removal structures using geotextile tubes along the coast, that had resulted on positive experiences for beach/dune protection and recovery (i.e. Progreso to Chicxulub , Telchac and Las Coloradas beaches , Yucatan). This poster resumes the experiences from projects dealing with coastal erosion issues that AXIS Ingenieria has conducted being the goal the development and implementation of a Yucatan beach manage-ment program.

INVESTIGATIONS OF THE BALTIC SEA COASTAL ZONE ABOVE-WATER PART TOPOGRAPHY DYNAMICS BY MEANS OF TERRESTRIAL LASER SCANNER (SVETLOGORSK CITY, KALININGRAD REGION)

2017 ◽  
Author(s):  
Nikolay Lugovoy ◽  
Nikolay Lugovoy ◽  
Askar Ilyasov ◽  
Askar Ilyasov ◽  
Elena Pronina ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Coastal Zone ◽  
Coastal Erosion ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
The Baltic Sea ◽  
Coastal Dynamics ◽  
Kaliningrad Region ◽  
The Baltic

The paper describes application of the terrestrial laser scanner for investigation of coastal dynamics of the Svetlogorskaya Bay, Baltic Sea. Methods of investigation and results of surveys repeated over the two consecutive years for quantification of coastal erosion and slope processes within the coastal zone are presented.

Coastal zone development: Mitigation, marsh creation, and decision-making

1982 ◽  
Vol 6 (4) ◽  
pp. 317-328 ◽  
Author(s):  
Margaret Seluk Race ◽  
Donna R. Christie
Keyword(s):  
Decision Making ◽  
Coastal Zone ◽  
Zone Development ◽  
Marsh Creation

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 Dynamics of Farming Systems under the Context of Coastal Zone Development: The Case of Xuan Thuy National Park, Vietnam

Agriculture ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 138 ◽  
Author(s):  
Thi Trang Nhung NGUYEN ◽  
Huu Cuong TRAN ◽  
Thi Minh Hop HO ◽  
Philippe BURNY ◽  
Philippe LEBAILLY
Keyword(s):  
Coastal Zone ◽  
National Park ◽  
Production Efficiency ◽  
Family Income ◽  
Farming Systems ◽  
Coastal Development ◽  
Variable Cost ◽  
Integrated Aquaculture ◽  
Rural Livelihood ◽  
Zone Development

The study was conducted in Xuan Thuy National Park to provide a comparative assessment of different farming systems under the context of the coastal zone development of Vietnam. Based on a sample of 234 farmers in this area, SCP (Structure–Conduct–Performance) analysis revealed three farming systems: integrated aquaculture–mangrove (IAM), intensive shrimp (ISH), and rice-based (RB) farming. The evaluation of farm performance among the systems indicated that ISH incurred the highest values of variable cost and sustainable family income. Meanwhile, IAM obtained the lowest production cost due to the availability of allocated natural resources. The imbalance of applying synthesized fertilizers and an overdependence on nitro-based fertilizers were reported in the case of RB systems. In comparison with the other coastal areas of Vietnam, these farming systems achieved a lower level of production efficiency. It is urgent for policy makers to take action to promote sustainable farming practices in accordance with the stringent enforcement of environmental standards to reduce potential impacts and strengthen the coexistence of systems. Additionally, the purpose of securing rural livelihood under coastal development is aligned with the recommended solutions for economic improvement in this study.

Estimate of Storm Induced Beach Erosion Through the ETS Approach

2008 ◽  
Author(s):  
Rosaria E. Musumeci ◽  
Carla Faraci ◽  
Felice Arena ◽  
Enrico Foti
Keyword(s):  
Return Period ◽  
Extreme Events ◽  
Coastal Erosion ◽  
Beach Erosion ◽  
Coastal Protection ◽  
Shoreline Retreat ◽  
Submerged Breakwater ◽  
The One

In the present paper the risk of beach erosion is evaluated by applying the Equivalent Triangular Storm (ETS). The selected case study is ‘La Plaja’ beach located in the South of Catania, Sicily. The proposed approach has shown that when the ETS model is applied, a shoreline retreat has been found which on average overestimates the one obtained by means of actual storm data of about 35%. The model has been applied for the determination of the return period of shoreline recession due to beach erosion during extreme events in order to recover risk maps, which can provide useful information in the planning of coastal interventions. Finally the model has been applied to predict the shoreline retreat in the presence of a submerged breakwater, confirming that the introduction of such coastal protection work strongly limits the risk of coastal erosion.

scholarly journals Rapid retreat of permafrost coastline observed with aerial drone photogrammetry

2019 ◽  
Vol 13 (5) ◽  
pp. 1513-1528 ◽  
Author(s):  
Andrew M. Cunliffe ◽  
George Tanski ◽  
Boris Radosavljevic ◽  
William F. Palmer ◽  
Torsten Sachs ◽  
...  
Keyword(s):  
Coastal Erosion ◽  
Average Rate ◽  
Temporal Frequency ◽  
Shoreline Change ◽  
Yukon Territory ◽  
Aerial Photographs ◽  
The Arctic ◽  
Storm Events ◽  
Short Term

Abstract. Permafrost landscapes are changing around the Arctic in response to climate warming, with coastal erosion being one of the most prominent and hazardous features. Using drone platforms, satellite images, and historic aerial photographs, we observed the rapid retreat of a permafrost coastline on Qikiqtaruk – Herschel Island, Yukon Territory, in the Canadian Beaufort Sea. This coastline is adjacent to a gravel spit accommodating several culturally significant sites and is the logistical base for the Qikiqtaruk – Herschel Island Territorial Park operations. In this study we sought to (i) assess short-term coastal erosion dynamics over fine temporal resolution, (ii) evaluate short-term shoreline change in the context of long-term observations, and (iii) demonstrate the potential of low-cost lightweight unmanned aerial vehicles (“drones”) to inform coastline studies and management decisions. We resurveyed a 500 m permafrost coastal reach at high temporal frequency (seven surveys over 40 d in 2017). Intra-seasonal shoreline changes were related to meteorological and oceanographic variables to understand controls on intra-seasonal erosion patterns. To put our short-term observations into historical context, we combined our analysis of shoreline positions in 2016 and 2017 with historical observations from 1952, 1970, 2000, and 2011. In just the summer of 2017, we observed coastal retreat of 14.5 m, more than 6 times faster than the long-term average rate of 2.2±0.1 m a−1 (1952–2017). Coastline retreat rates exceeded 1.0±0.1 m d−1 over a single 4 d period. Over 40 d, we estimated removal of ca. 0.96 m3 m−1 d−1. These findings highlight the episodic nature of shoreline change and the important role of storm events, which are poorly understood along permafrost coastlines. We found drone surveys combined with image-based modelling yield fine spatial resolution and accurately geolocated observations that are highly suitable to observe intra-seasonal erosion dynamics in rapidly changing Arctic landscapes.

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