scholarly journals HISTORICAL BEACH EROSION OF SOUTHWEST SURUGA COAST AND SHORE PROTECTION

2000 ◽  
Vol 16 ◽  
pp. 601-606
Author(s):  
Takaaki UDA ◽  
Satoquo SEINO ◽  
Toshinori ISHIKAWA ◽  
Masumi SERIZAWA
Keyword(s):  
Beach Erosion ◽  
Shore Protection

BEACH PROCESSES AND SHORE PROTECTION ALONG THE NORTHERN COLOMBIA COAST

2020 ◽  
Vol 1 (2) ◽  
pp. 60-85
Author(s):  
PING WANG
Keyword(s):  
Beach Erosion ◽  
Trade Wind ◽  
Sand Transport ◽  
Shore Protection ◽  
Tropical Zone ◽  
Longshore Sediment Transport ◽  
Longshore Transport ◽  
Shoreline Protection ◽  
Beach Processes ◽  
Northeast Trade Wind

The shoreline of northern Colombia is located in the tropical zone along the south coast of Caribbean Sea. Its coastal processes are strongly influenced by the northeast trade wind, which results in the dominating northeasterly approaching wave occurring over 95% of the time. This drives a persistent southwestward longshore sand transport. The state of the beach along the generally northeast-southwest trending northern Colombia coast is strongly influenced by this constant unidirectional longshore sediment transport. At locations where this westward longshore sand transport is interrupted, naturally or  anthropogenically, beach accretion occurs along the updrift shoreline coupled with erosion at the downdrift side. Natural interruption of longshore transport can be caused by tidal inlets, protruding headland, shoreline orientation change, and nearshore bathymetry variations. Anthropogenic interruption of the longshore transport along the northern Colombia coast is mainly caused by the construction of groins, as well as harbors at some locations. Numerous groins were constructed due to their local success in creating beach accretion at the drift side. However, severe beach erosion occurs along the downdrift shoreline. Shoreline protection along the northern Colombia coast, and coasts in the tropical area in general, should carefully consider the persistent unidirectional longshore sand transport and should not be misguided by the local updrift accumulation as being a successful project.

scholarly journals Shore Protection Structures Increase and Evolution on the Northern Tuscany Coast (Italy): Influence of Tourism Industry

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1647 ◽  
Author(s):  
Enzo Pranzini ◽  
Giorgio Anfuso ◽  
Irene Cinelli ◽  
Marco Piccardi ◽  
Giovanni Vitale
Keyword(s):  
Negative Impact ◽  
Management Plan ◽  
Tourism Industry ◽  
Beach Erosion ◽  
Shore Protection ◽  
Natural Sediment ◽  
Forcing Function ◽  
Hard Structures ◽  
The 19Th Century ◽  
Protection Structures

Analysis of a large shoreline database (from 1878 to 2017) and recompilation of information on type/age of shore protection structures along the Northern Tuscany, allowed a deep insight of the progressive armouring of this coastal sector. The area experienced beach erosion since the end of the 19th century due to reduced sediment inputs from rivers and harbour constructions. Shore protection structures started to develop at the beginning of the 20th century, first to protect settlements and coastal roads, later to maintain a beach for tourist activity. The changing of the goal and the increasing awareness of the negative impact of some structures resulted in an evolution of coastal defence projects: initially, seawalls and revetments, later detached breakwaters and, more recently, groins. Today, a reduction in hard structures is perceived by removing or lowering detached breakwaters and groins below mean sea level. The forcing function of the growing tourism industry is producing a demand for projects and their design is detailed in this paper: results will be of use in the correct design of a long-term, general, erosion management plan to restore the natural sediment circulation patterns.

scholarly journals NEW TYPE BLOCKS FOR SEAWALL SLOPE PROTECTION

1984 ◽  
Vol 1 (19) ◽  
pp. 170 ◽  
Author(s):  
Osamu Toyoshima
Keyword(s):  
Coastal Areas ◽  
Beach Erosion ◽  
Shore Protection ◽  
Land Preservation ◽  
New Type

Japan is a mountaineous country, and coastal areas have been looked upon quite valuable. In most cases, shorelines were slightly advancing until 1950, although there are some exceptional coasts which have been under continuous erosion for more than a thousand years. However, in the last thirty years, beaches began to be eroded one after another, and the countermeasure against beach erosion has become one of the most important problems in the national land preservation. Since the early 1960's, many seawalls against the beach erosion have been constructed. The table shows the amounts of the shore protection works constructed in the last twenty years.

scholarly journals RECENT ADVANCES IN COASTAL STRUCTURE DESIGN

2011 ◽  
Vol 1 (8) ◽  
pp. 23
Author(s):  
Charles E. Lee
Keyword(s):  
Structure Design ◽  
Beach Erosion ◽  
Scale Model ◽  
Small Scale ◽  
Shore Protection ◽  
Corps Of Engineers ◽  
Modern Design ◽  
Recent Advances ◽  
New Findings ◽  
Design And Construction

The type and scope of work accomplished and responsibility and authority of the office to which he is attached is indicative of the interests of an author and of the information available to him. It is therefore pertinent to cover in this general section a summary of the responsibility and the delegated authority of the Corps of Engineers as regards Coastal Engineering. The subject of recent advances in coastal structures is quite broad and complex and modern design practice incorporates old and new findings. This paper discusses various aspects of proper modern design of breakwaters and jetties with special attention to newer findings, their proper application and the means by which the findings were made. The Corps has the responsibility for the planning, investigation, design and construction of Federal civil works navigation projects. This consists generally of harbor and channel works. Their responsibility extends to the control of all works, private or governmental, to assure that navigation will not be adversely affected. They are also charged with the responsibility of planning, investigation, design and construction of Federal civil works projects involving shore protection from wave and currents, protection from effects of hurricane, tsunamis and tidal flooding, and of beach erosion control. The accomplishment of such a mission therefore includes research of an applied nature to permit advancement in knowledge and technique. Most of this research is based on small scale model studies accomplished at the U. S. Army Engineer Waterways Experiment Station at Vicksburg, Mississippi, and at the laboratory of the Corps of Engineers Beach Erosion Board in Washington, D. C. In addition a limited number of prototype studies are being initiated in the charge of the staffs of various District Engineers.

scholarly journals SHORE PROTECTION ON THE COAST OP "YAIZU"

1966 ◽  
Vol 1 (10) ◽  
pp. 66
Author(s):  
Goichi Seo ◽  
Tatsuma Fukuchi
Keyword(s):  
Coastal Area ◽  
Beach Erosion ◽  
Shore Protection ◽  
History Of

This report describes the history of beach erosion and the countermeasures against it extending over the last few centuries on the coast of "YAIZU" Pishing Port. It also includes a study on the causes of erosion by analysing geographical, topographical and oceanogrphical conditions of the coastal area.

scholarly journals Beachfront Owners Perception of Beach Erosion along an Armored Shoreline in Southern Brazil

2000 ◽  
Vol 27 (2) ◽  
pp. 93 ◽  
Author(s):  
LUCIANA SLOMP ESTEVES ◽  
MARIA ALEJANDRA GOMEZ PIVEL ◽  
AMALIA PUCCIENELLI DA SILVA ◽  
RODRIGO DO CARMO BARLETTA ◽  
MAURO PAQUETE VRANJAC ◽  
...  
Keyword(s):  
Rio Grande ◽  
Beach Erosion ◽  
Storm Events ◽  
Shore Protection ◽  
Rio Grande Do Sul ◽  
Urban Centers ◽  
Beach Width ◽  
The Impact ◽  
Rising Sea Level ◽  
Protection Structures

Brazil has about 8500 km of coastline that is mostly undeveloped. However, the pressure of fast-growing coastal urban centers is already impacting the shore. This paper characterizes shore protection works in Hermenegildo Beach, evaluates their efficiency to protect property against the impact of storm events, and presents the response of beachfront owners to erosion. Hermenegildo is a beach village located 12km north of the border with Uruguay in Rio Grande do Sul, the southernmost state in Brazil. Several factors contribute to beach erosion in Hermenegildo: storm surge, redistribution of wave energy, rising sea level, the presence of an underlying layer of impermeable peat, and human activities. The shoreline is heavily armored with about 61% of beachfront houses protected by revetments (30%), seawalls (18%), or a combination of both (13%). A strong storm struck the Rio Grande do Sul coast in 16 April 1999 and resulted in severe beach erosion and destroyed 22 houses, besides all concrete structures, half of the quarrystone revetments, and 80% of the timber seawalls. Shore protection structures in Hermenegildo are threatened by erosion because: (1) they were built too close to the water, (2) shoreline retreat has been observed, and (3) armoring has reduced beach width. Most of the beachfront owners are aware of the severe beach erosion problem and appear to understand basic coastal dynamics. About 82% of the interviewed beachfront owners lost property due to erosion; 88% subsequently built protection structures to prevent further loss. Surprisingly, 88% of those who did not experience property damage also built defense structures. Armoring is commonly an initiative of beachfront owners who build low-budget structures without consultation by technical experts.

scholarly journals Complete Proceedings - Single PDF Download

1982 ◽  
Vol 1 (18) ◽  
Author(s):  
Billy L. Edge
Keyword(s):  
Offshore Structures ◽  
Beach Erosion ◽  
Height Distribution ◽  
Shore Protection ◽  
Construction Monitoring ◽  
Wave Height Distribution ◽  
Major Subject ◽  
Profile Changes ◽  
Engineering Conference ◽  
And Performance

These proceedings of the Eighteenth Coastal Engineering Conference held in Cape Town, Republic of South Africa, November 14-19, 1982 include the 167 papers presented at the conference. The proceedings are divided into 5 major subject areas. Part I, theoretical and observed wave characteristics, includes discussions on wave height distribution, waves in nearshore zones, tide predictions, wave energy conversion and wind effects. Part II, covers aspects of coastal sediment problems such as sediment transport, shore protection, beach profile changes, and beach erosion. Part III, coastal structures and related problems, covers construction, monitoring and performance of different coastal and offshore structures. Coastal, estuarine, and environmental problems are addressed in Part IV, including design of coastal water intakes, salinity intrusion, ocean outfalls, and environmental effects of construction. The final section covers ship motion response.

scholarly journals DESIGN AND CONSTRUCTION OF GROINS

2010 ◽  
Vol 1 (1) ◽  
pp. 27
Author(s):  
Donald F. Horton
Keyword(s):  
Present State ◽  
Current Practice ◽  
State Of The Art ◽  
Beach Erosion ◽  
Shore Protection ◽  
Proper Design ◽  
The Subject ◽  
Design And Construction

Groins are frequently used for shore protection and improvement. Not infrequently the owner of shore property who has had groins built to protect or improve his property is disappointed with the results. More often than not this unhappy situation must be attributed to the fact that too much was expected by the owner. The owner in such a case is not properly to be criticized, because a great deal remains to be learned about groins; their effects, their proper design and construction. In the present state of the art of shore protection and improvement it is not possible to design and build groins without facing numerous uncertainties, particularly in the area of advance determination of the results which will be accomplished. This condition is faced frankly at the very beginning of this paper and should be kept in mind throughout the consideration of the subject of groin design and construction. This paper presents a digest of what is considered by the writer to be the best current practice. No pretense is made for the development of original ideas on the subject. The writer is indebted to many engineers who have contributed accounts of their experiences to the literature, and to the members of the Beach Erosion Board and its staff, especially Dr. Martin A. Mason.

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.

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