scholarly journals RECESSION OF PREDOMINANTLY SANDY BLUFFS

2018 ◽  
pp. 78
Author(s):  
Mahsa Ghazian Arabi ◽  
Ali Farhadzadeh ◽  
Ali Khosravi
Keyword(s):  
Coastal Zone Management ◽  
Wave Climate ◽  
Wave Flume ◽  
Zone Management ◽  
Sand Bars ◽  
Past Half Century ◽  
Erosion Mechanisms ◽  
Incident Waves ◽  
Coastal Bluff ◽  
Important Progress

Climate change and sea level rise are anticipated to accelerate coastal erosion, a major societal issue during the past half-century (Hapke, et al., 2009). While important progress has been made in predicting sandy beach responses to various ocean climates, a similar progress has not been made for coastal bluffs. Coastal bluff recession is a natural process that can become a hazard when it endangers buildings and developed properties. Despite some early works on cohesive shoreline erosion mechanisms (Dalrymple, et al., 1986; Sunamura, 1985), prediction of bluff recession still remains one of the main questions in coastal zone management. Several experiment studies were conducted in wave flumes to investigate the effective parameter. Earlier experiments focused mainly on hard cliff and cohesive bluffs erosion in the 1970s, under normally incident waves and have been reported by Sanders (1968), Horikawa and Sunamura (1970), and Sunamura (1983). During the 1980s–1990s a number of studies were conducted to understand erosion of cohesive coastal profiles with or without an overlying veneer of sand (Nairn, 1986, and Skafel and Bishop, 1994). These works used artificial or prototype clays for the cliff and focused primarily on the erosion process of the clay at beach or foreshore. A recent study by Caplain et al. (2011) investigates the effect of wave climate on the rate of sandy cliff recession in a wave flume. They reported observations of sand movements, sand bars dynamics and cliff recession rate.

scholarly journals Shoreline Stabilization with Experimental Groin Field(s): Modular Adjustable Permeable Groins

2018 ◽  
Author(s):  
Nicholas De Gennaro ◽  
Frank Gable
Keyword(s):  
South Carolina ◽  
Retention Rate ◽  
Coastal Zone Management ◽  
Cost Benefit ◽  
Cost Effective ◽  
The United States ◽  
Wave Climate ◽  
Shoreline Stabilization ◽  
Zone Management ◽  
Engineered Structures

This manuscript introduces prospective hard engineering solutions to continuous episodic erosional events on beaches utilized for recreation and tourism. The basis of this paper is information from a modeling study completed in 2011 on a two mile stretch of beach in South Carolina. The study utilized three alternative groin systems and a no groin option. The optimum spacing of the groin applications and the retention rate of a replenished beach at the location was determined based on running a computer model (Genesis) for the environmental conditions (wave climate, littoral transport, etc.) at the demonstration site. It was also determined that the innovative groin alternative presented in this paper would likely develop as the most effective cost/benefit relationship among the more conventional alternatives utilized in the United States. The experimental groin system (modular adjustable permeable groin(s) MAPG) was calculated to save initial construction costs by 25% to 30%as compared to the other alternatives. This was significant when considering that adjacent beach impacts are minimized and the beach berm is better protected over the typical beach re-nourishment cycle. This paper attempts to facilitate further discussion of regional sediment budget and (coastal zone) management by bridging the divide between choosing only sand nourishment vs. engineered structures. We demonstrate that reintroducing engineered structures in combination with beach nourishment can be a cost effective solution to episodic erosional events over time while allowing longshore sediment transport.

Disintegrated coastal zone management (DICZM): an example from Auckland, New Zealand

2020 ◽  
Author(s):  
Martin Brook ◽  
Alex Palma ◽  
Rosemary Garill ◽  
Nick Richards ◽  
Jon Tunnicliffe
Keyword(s):  
New Zealand ◽  
Coastal Zone ◽  
Coastal Zone Management ◽  
Land Development ◽  
High Energy ◽  
Wave Climate ◽  
Engineering Properties ◽  
Coastal Protection ◽  
Zone Management ◽  
Auckland Region

<p>Typically, integrated coastal zone management (ICZM) uses the informed participation and cooperation of all stakeholders to assess the societal goals in a given coastal area. ICZM seeks, over the long term, to balance environmental, economic, social, cultural and recreational objectives, all within the limits set by natural dynamics. We outline coastal instability in the Auckland region of New Zealand, where the effects of natural coastal dynamics appear to have been underplayed, or even overlooked, during the residential land development process. Auckland is New Zealand’s largest city, with the Auckland region encompassing c. 3,300 km of coastline, with a highly variable wave climate and coastal geomorphology. The sparsely inhabited high energy west coast records significant wave heights of 2-3 m for much of the year. In contrast, the eastern bay coastlines are lee coasts, protected by offshore islands in the Hauraki Gulf and the Coromandel Peninsula. Nevertheless, significant coastal cliff instability does occur along these eastern coasts, which are heavily populated, with houses often constructed within 10 m of the cliff edge. Coastal instability in the Beachlands area in particular, is part-conditioned by engineering properties of the cliff materials, which include soft, Pleistocene sediments. In particular, shear surfaces develop along clay-rich tephra layers, which are of low-permeability, leading to increased porewater pressure, and cliff failure.  Despite the clear failure mechanisms, coastal protection works and routing of domestic stormwater over the cliffs has led to further coastal instability.</p>

Integrated Approach to Coastal Zone Management in Puerto Galera, Oriental Mindoro, Philippines

1984 ◽  
Vol 16 (3-4) ◽  
pp. 433-440
Author(s):  
O C A Iriberri
Keyword(s):  
Coastal Zone ◽  
Coastal Zone Management ◽  
Integrated Approach ◽  
Physical Parameters ◽  
Ecological Studies ◽  
Continuous Increase ◽  
Zone Management ◽  
Single Fragment ◽  
Human Attitude ◽  
And Migration

Coastal zone management requires an understanding of the complex milieu of interactions and activities taking place in an environmental system. Man is beginning to recognize that the old method of dealing with individual issues and problems as single fragment of a whole ecosystem is not enough. This paper tries to deal with the integrated manner in carrying out effectively the management of the coastal zone in Puerto Galera, Oriental Mindoro by the Man and the Biosphere Interagency Committee on Ecological Studies. To attain the objective of the project, the different agencies monitor, identify, observe, investigate various natural and physical parameters contributing to the ecological balance and study the rational use of the resources along the coastal zone. Result of the study showed that although such factors as land use practices of shifting cultivation (kaingin), human attitude towards forest and its resources, and continuous increase in population and migration of people were observed, such pressure on lands has not greatly affected the Puerto Galera coastal zone resources.

Unmanned Aerial Vehicle (UAV) applications in coastal zone management—a review

2021 ◽  
Vol 193 (3) ◽  
Author(s):  
Richard Adade ◽  
Abiodun Musa Aibinu ◽  
Bernard Ekumah ◽  
Jerry Asaana
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Coastal Zone ◽  
Coastal Zone Management ◽  
Zone Management ◽  
Aerial Vehicle

scholarly journals Beach Certification Schemes in Latin America: Are They Applicable to the Brazilian Context?

2021 ◽  
Vol 13 (2) ◽  
pp. 934
Author(s):  
Luidgi Marchese ◽  
Camilo M. Botero ◽  
Seweryn Zielinski ◽  
Giorgio Anfuso ◽  
Marcus Polette ◽  
...  
Keyword(s):  
Latin America ◽  
Land Use Planning ◽  
Management Strategy ◽  
Economic Value ◽  
Coastal Zone Management ◽  
Management Tool ◽  
Potential Contribution ◽  
Coastal Zones ◽  
Beach Management ◽  
Zone Management

Beaches are multidimensional ecosystems that develop relevant natural functions and host tourist activities of great economic value. Therefore, they are currently being subjected to severe human pressure and natural impacts often enhanced by climate change. Beach certification schemes (BCSs) were designed to bridge the gap between recreation and conservation uses. The aim of this paper is to assess the compatibility and potential contribution of nine Beach Classification Schemes (BCSs) used in Latin America with the Orla Project implemented in Brazil to optimize land use planning of coastal zones, including beaches. The weaknesses and strengths of each BCSs were assessed according to the criteria for integrated coastal zone management. As a result, four of the nine BCSs were found to be the most compatible with the context of Brazilian beaches (Ecuadorian, Colombian, Cuban, and Argentinean BCSs), indicating that BCSs can contribute to specific aspects of beach management, but they should not be the only management strategy. In conclusion, the strengths of the four BCSs identified in this study can be used to build a new management tool for Brazilian beaches aligned with the Orla Project—the main coastal planning and management instrument currently used.

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